BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Ultracold neutron source based on superfluid helium for the PIK re actor DTSTART;VALUE=DATE-TIME:20261028T134500Z DTEND;VALUE=DATE-TIME:20261028T140000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6375@cern.ch DESCRIPTION:Speakers: Vitaliy Lyamkin (NRC "Kurchatov Institute" - PNPI)\n New ultracold neutron source based on superfluid helium is being construct ing at the PIK reactor for researches in the field of fundamental interact ions physics. The use of superfluid helium will allow achieving an UCN den sity in the source chamber of 3400 cm-3\, which is an order of magnitude h igher than the current UCN density in sources around the world.\nTo create this UCN source some important technologies has been developed and implem ented: obtaining and maintaining superfluid helium at low temperatures und er conditions of heat influx from the reactor\, manufacturing neutron guid es with a high UCN reflection coefficient\, developing heat exchangers for ultra-low temperatures and obtaining isotopically pure helium-4. \nThe UC N source neutron guide system is designed for four scientific stations. Du ring the first stage of the source's operation\, it is planned to install an EDM spectrometer with a measurement sensitivity of 1E-27 e∙cm/year an d two experiments to measure the neutron lifetime with an accuracy of 0.1 seconds using gravitational and magnetic traps.\n\nhttps://indico.particle .mephi.ru/event/626/contributions/6375/ LOCATION: Conference Hall 3 URL:https://indico.particle.mephi.ru/event/626/contributions/6375/ END:VEVENT BEGIN:VEVENT SUMMARY:The new accelerator facility for applied research DC-140 FLNR JINR status DTSTART;VALUE=DATE-TIME:20261030T070000Z DTEND;VALUE=DATE-TIME:20261030T071500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6369@cern.ch DESCRIPTION:Speakers: Vasiliy Semin (JINR)\nA wide range of applied resear ch with accelerator ions beam is being implemented at the Flerov Laborator y of Nuclear Reactions JINR. Currently\, more than 6\,000 hours of acceler ated time are allocated to such work per year. The volume of applied resea rch is constantly increasing. To meet the requirements for beams and accel eration time\, FLNR is implementing a program to create a new accelerator complex\, DC-140. \n The accelerator complex is based on the DC-140 cyc lotron with an ion source DECRIS-5M. The complex includes three channels w ith experimental setups. The cyclotron operates at a single frequency of 8 .632 MHz and accelerates ions in two modes: the 2nd harmonic to an energy of 4.8 MeV/nucleon and the 3rd harmonic to an energy of 2.214 MeV/nucleon. The DECRIS-5M work on frequency 18 GHz allows obtaining ion beams from 16 O to 209Bi. The extraction of the accelerated beam using an electrostatic deflector operating together with a passive magnetic channel and permanen t magnets quadrupole (PMQ) ensures high acceleration efficiency. The exper imental channels are equipped with all necessary diagnostic systems\, a sy stem for forming the sample irradiation field and experimental chambers. \ n The project started in 2020. The construction of facility has been imp lemented since 2022. Commissioning of the complex's systems will begin at the end of 2025. The commissioning with accelerated beams started in Augus t 2026. The current status of the project and first experimental results a re presented in the report.\n\nhttps://indico.particle.mephi.ru/event/626/ contributions/6369/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6369/ END:VEVENT BEGIN:VEVENT SUMMARY:Characterization of argon recoils at the keV scale with ReD and Re D+ DTSTART;VALUE=DATE-TIME:20261030T153000Z DTEND;VALUE=DATE-TIME:20261030T154500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6396@cern.ch DESCRIPTION:Speakers: Simone Sanfilippo (INFN – LNS\, Catania (Italy))\n Dual-phase liquid argon time projection chambers (LAr TPCs) are widely use d in the direct\nsearch for weakly interacting massive particles (WIMPs)\, traditionally targeting masses of\nthe order of 100 GeV. Future-generatio n LAr TPCs aim to extend this search towards lower\nWIMP masses\, down to the GeV scale. In this regime\, WIMP interactions are expected to\nproduce nuclear recoils (NRs) in liquid argon with energies of only a few keV\, w here the\ndetector response is still not fully characterized.\nTo address this challenge\, the Recoil Directionality (ReD) experiment was developed within\nthe DarkSide-20k Collaboration to produce and characterize few-keV nuclear recoils in liquid\nargon. A compact dual-phase LAr TPC was irradi ated with neutrons from a 252Cf source\,\nproducing argon nuclear recoils through neutron scattering. A downstream spectrometer\nconsisting of 18 pl astic scintillators detected neutrons scattered by argon nuclei\, enabling \nthe recoil energy to be reconstructed through two-body kinematics. This technique allowed\nthe ionization yield of liquid argon\, Q_y\, defined as the number of electrons produced per\nunit energy deposition\, to be meas ured in a model-independent manner down to 2 keV.\nThe measured Q_y is fou nd to be consistent with existing measurements at higher recoil\nenergies\ , while showing an increase towards lower energies. These results provide new\nexperimental constraints on the modeling of low-energy nuclear recoil s in liquid argon and\nare particularly relevant for the interpretation of Dark Matter searches in the low-mass WIMP\nregime.\nIn this contribution\ , an overview of the ReD experiment and its measurement technique will\nbe presented\, together with the main results of the published measurement. Finally\, the\nimpact of the improved characterization of the argon respon se on the sensitivity of the\nupcoming DarkSide-20k experiment will be dis cussed\, highlighting the enhanced discovery\npotential for low-mass Dark Matter candidates.\n\nhttps://indico.particle.mephi.ru/event/626/contribut ions/6396/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6396/ END:VEVENT BEGIN:VEVENT SUMMARY:Energy-Transfer Mechanisms in Nd-Containing Perovskite Quantum-Dot Liquid Scintillators for Rare Nuclear Process Detection DTSTART;VALUE=DATE-TIME:20261030T164500Z DTEND;VALUE=DATE-TIME:20261030T170000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6387@cern.ch DESCRIPTION:Speakers: Vasily Kornoukhov (NRNU MEPhI)\nWe investigate Nd-co ntaining mixed-halide perovskite quantum dots in organic liquids as candid ate scintillation media for rare nuclear processes. Photoluminescence meas urements have been completed for twelve compositions based on pseudocumene \, dodecane\, and syntin\, with varying 2\,5-diphenyloxazole (PPO) and nap hthalene content. Comparative data analysis is ongoing.\nIn the analyzed p seudocumene dilution series\, emission maxima lie at 501.5–505.5 nm. Add ing PPO at 2 g/L does not enhance quantum-dot emission under the optical e xcitation conditions studied. Relative suppression increases with dilution \, reaching 48.8% in peak intensity and 35.3% in integrated band intensity at a nominal 1:30 dilution compared with the corresponding sample without PPO. Steady-state spectra alone cannot distinguish absorption losses from changes in energy transfer and nonradiative decay.\nFurther absorption an d fluorescence-decay measurements are planned to examine energy transfer b etween the solvent\, organic additives\, and quantum dots. Scintillation p erformance will be assessed independently using ¹³⁷Cs\, with relative light yield evaluated from the Compton edge near 477 keV in a fixed geomet ry\, accounting for photodetector spectral sensitivity.\nThe detector conc ept combines neodymium incorporation and scintillation in the same active volume. Potential applications\, subject to scintillation and stability va lidation\, include detectors for ¹⁵⁰Nd double-beta-decay studies\, ne utrino experiments\, and gamma-ray spectroscopy.\nKeywords: liquid scintil lator\; perovskite quantum dots\; neodymium\; energy transfer\; photolumin escence\; double-beta decay\; gamma-ray detection.\n\nhttps://indico.parti cle.mephi.ru/event/626/contributions/6387/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6387/ END:VEVENT BEGIN:VEVENT SUMMARY:Determination of Ionization Yields for Recoil Nuclei in Argon DTSTART;VALUE=DATE-TIME:20261030T154500Z DTEND;VALUE=DATE-TIME:20261030T160000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6386@cern.ch DESCRIPTION:Speakers: Mikhail Bakulev (MSU Physics Faculty)\nTwo-phase (li quid–gas) argon detectors exhibit good sensitivity to relatively low rec oil-nucleus energies (~ 1 keV) — which is precisely why they have found widespread application in nuclear physics and astrophysics experiments. Sc aling up to active masses of tens of tonnes opens up another area for them — WIMP searches. Reconstruction of the recoil-nucleus energy from the d etector signal is impossible without knowledge of the ionization yield\, i .e. the ratio of the number of electrons emitted from the liquid into the gas to the recoil-nucleus energy. Ionization yields are most conveniently measured using neutrons that mimic WIMPs.\n\nWork on measuring argon ioniz ation yields with a two-phase detector is underway at the Budker Institute of Nuclear Physics. The recoil-nucleus energy of 120 keV obtained in earl ier measurements with a 2.45 MeV neutron beam from a D–D reaction-based neutron generator [1] was relatively high\; moreover\, the accumulated sta tistics were insufficient to achieve the required accuracy. A solution was found in the use of the VITA accelerator-based neutron source at BINP SB RAS\, employed for the development of boron neutron capture therapy (BNCT) techniques [2\, 3]: it made it possible both to increase the statistics a nd to move to lower recoil-nucleus energies. For two series of test measur ements\, a scintillation detector based on a stilbene single crystal and a photomultiplier tube was used instead of the two-phase detector. This mad e it possible to determine the detection thresholds of the neutron dtector s and the quenching factors of the stilbene crystals. Agreement with the e xperiment was also demonstrated by Monte Carlo simulations of the energy s pectra of scattered neutrons.\n\nThe next phase of the experiment is curre ntly being prepared: the light collection of the two-phase detector is to be increased\, and the detector itself is to be placed in the bunker of th e VITA accelerator-based neutron source. The light collection is planned t o be improved by coating the entire surface of the detector with the wavel ength shifter tetraphenylbutadiene (TPB). A series of studies has already been carried out\, in which the re-emission efficiency of TPB was measured and aging effects were investigated. The sensitivity to optical scintilla tion signals is expected to be enhanced by installing an additional photod etector array of silicon photomultipliers (SiPMs) ArrayC-60035-4P-BGA. For these SiPMs\, the gain\, the cross-talk probability\, and the dark noise count rate at cryogenic temperature have been measured.\n\nReferences\n 1. A. E. Bondar et al.\, Siberian Physical Journal 12\, 3 (2017). \n 2 . С. Ю. Таскаев. Ускорительный источник не йтронов VITA. М.: ФИЗМАТЛИТ\, 2024. 248 c. \n 3. S. Ta skaev et al. VITA accelerator neutron sources: status and research results . Preprint 202605.0884 (2026).\n\nhttps://indico.particle.mephi.ru/event/6 26/contributions/6386/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6386/ END:VEVENT BEGIN:VEVENT SUMMARY:Water Cherenkov Detector for Study of Wavelength Shifting Plates DTSTART;VALUE=DATE-TIME:20261030T144500Z DTEND;VALUE=DATE-TIME:20261030T150000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6384@cern.ch DESCRIPTION:Speakers: Nikita Shvarev (The Institute for Nuclear Research o f the Russian Academy of Sciences)\nThe Hyper-Kamiokande experiment [1] ai ms for a search for CP violation in neutrino oscillations\, proton decay\, measurements of solar and atmospheric neutrinos\, and other neutrino phys ics using a large water Cherenkov detector. The outer veto Chrenkov detect or will use about 4000 optical modules based on PMT’s and wavelength -shifting (WLS) plates [2]\, which enhances light collection efficiency an d improves particle identification.\n\nThis report describes the prototype of water Cherenkov detector constructed to evaluate the characteristics o f WLS plates under conditions of Hyper-Kamiokande. The prototype features a scaled-down water tank and an outer detector module consisting of a 3-in ch Hamamatsu R14374 photomultiplier tube (PMT) [3] and a 30 × 30 cm\, 7 m m thick WLS plate. The water purification system of this detector has curr ently achieved a resistivity of approximately 8 MΩ·cm. Parameters of WLS plates were measured using cosmic-ray muons. It was obtained that such a module (PMT plus WLS plate) increases light collection (the number of coll ected photons) by more than 2 times compared to the light collection of a bare PMT. \n\nFuture work will focus on upgrading the water purification s ystem to achieve characteristics approaching those of ultrapure water. Acq uiring data to create a Monte Carlo model of the WLS plates' optical chara cteristics is also a part of the future plans.\n\n\nKey words: Hyper-Kamio kande outer detector\, Water Cherenkov detector\, Water purification syste m\, Wavelength-shifting (WLS) plates\, Hamamatsu R14374 photomultiplier tu be (PMT)\, PMT coupling\, Cherenkov light\n\n1. Hyper-Kamiokande Proto-Col laboration\, K. Abe\, Ke. Abe\, et al. Hyper-Kamiokande Design Report 28 N ovember 2018 https://doi.org/10.48550/arXiv.1805.04163\n2. Alexander Izmay lov\, Gleb Erofeev\, et al. Development of the Wavelength-Shifting Plate L ight Collector for the Outer Detector of Hyper-Kamiokande https://doi.org/ 10.22323/1.468.0112\n3. Hamamatsu Photonics K.K.\, Datasheet “Photomulti plier tubes R14374\, R14689” www.hamamatsu.com\n\nhttps://indico.particl e.mephi.ru/event/626/contributions/6384/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6384/ END:VEVENT BEGIN:VEVENT SUMMARY:Construction of a Cryogenic CsI(pure) Scintillation Detector Proto type for Low Energy Neutrino Registration DTSTART;VALUE=DATE-TIME:20261030T141500Z DTEND;VALUE=DATE-TIME:20261030T143000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6383@cern.ch DESCRIPTION:Speakers: Alexander Strizhak (Institute for Nuclear Research o f the Russian Academy of Sciences(RU))\nThis talk presents the constructio n and testing of a modular scintillation detector prototype designed to re gister low-energy neutrino-induced recoil electrons with sub-keV threshold s (\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6383/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6383/ END:VEVENT BEGIN:VEVENT SUMMARY:R&D plastic scintillator with pulse shape discrimination capabilit y DTSTART;VALUE=DATE-TIME:20261030T151500Z DTEND;VALUE=DATE-TIME:20261030T153000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6382@cern.ch DESCRIPTION:Speakers: Tikhon Kozin ()\nThe work reports result of studies conducted to improve scintillation performance of plastic scintillators (P S) capable of neutron/gamma pulse-shape discrimination. A research group l ed by Zaitseva from LLNL made a major contribution to the field of develop ment such materials. However\, despite the accumulated experience of mater ial production\, there is a demand to modify their composition in order to improve their optical\, scintillation and mechanical characteristics. Com mercial products with good scintillation properties (EJ276D) are currently difficult to purchase. In this regard\, the creation of domestic\, commer cially available analogues is relevant for solving problems in fundamental and applied physics.\nIn this work\, methods for obtaining plastic scinti llators with PSD capability were reproduced. Poly(styrene-co-divinylbenzen e) was used as the scintillation base and 2\,5-diphenyloxazole\, para-terp henyl\, a mixture of diisopropylnaphthalene isomers and diphenyl were used as fluors. The light yield\, transparency\, figure of merit and hardness of the obtained PS samples were measured. The best performance for a sampl e with the composition 40% PPO\, 0.2% POPOP\, 7.5% DVB was achieved. The l ight yield was 1.12±0.05\, the transmittance coefficient (optical path le ngth 1 cm) at a wavelength of 430 nm was 0.72±0.02\, the figure of merit for n/γ pulse shape discrimination was 3.65±0.13\, and the Shore D hardn ess was 48±2. The obtained results are compared with the EJ276D sample an d literature data.\n\nhttps://indico.particle.mephi.ru/event/626/contribut ions/6382/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6382/ END:VEVENT BEGIN:VEVENT SUMMARY:Pyroelectric accelerator with quasimonoenergetic electron producti on: current status and challenges DTSTART;VALUE=DATE-TIME:20261030T140000Z DTEND;VALUE=DATE-TIME:20261030T141500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6372@cern.ch DESCRIPTION:Speakers: Andrei Oleinik (Belgorod State Unversity)\nPyroelect ric effect in some single crystals exposed to temperature variations under vacuum provides a simple route for producing and accelerating electron be ams. In particular\, lithium tantalate (LiTaO₃) crystals can generate el ectric field strong enough to accelerate electrons to energies exceeding 1 00 keV. This principle forms the basis of pyroelectric accelerators—comp act systems that operate without conventional external high-voltage suppli es or hazardous materials and have potential applications in electron\, io n\, neutron\, and X-ray generation\, as well as for calibrations detectors in large facilities.\nWe report our recent achievements in development o f pyroelectric accelerators. The quasi-continuous X-ray generation from a LiTaO₃-based pyroelectric accelerator driven by periodic temperature var iations is demonstrated [1]. This way allows to overcome the unpredictable nature of conventional pyroelectric X-ray sources. Stable X-ray emission (as electron quasimonoenergetic production) was achieved over repeated hea ting–cooling cycles\, highlighting the potential of this approach for co mpact and continuous radiation sources. Nowadays\, the way to control the energy of generated electron flow in a pyroelectric accelerator is propose d and developed\n\nThe research was supported by a grant from the Russian Science Foundation (Project No. 26-72-10002).\n\n[1]. Karataev\, P.\, Ali\ , M.\, Fedorov\, K. et al. Quasi-continuous X-ray generation in LiTaO3-bas ed pyroelectric accelerator driven by periodically varying temperature. Sc i Rep 15\, 31209 (2025).\n\nhttps://indico.particle.mephi.ru/event/626/con tributions/6372/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6372/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the optical properties of the scintillator strip – WLS fiber system for the AGORA muon detector DTSTART;VALUE=DATE-TIME:20261030T150000Z DTEND;VALUE=DATE-TIME:20261030T151500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6380@cern.ch DESCRIPTION:Speakers: Eduard Ginya (JINR)\nThe development of efficient an d cost-effective muon detection systems is an important task for future ci rcular lepton colliders such as CEPC and FCC-ee. Within the R&D program fo r the AGORA detector concept\, a scintillator-based muon system with wavel ength-shifting (WLS) fiber readout is being investigated. The performance of such a detector depends on the scintillator geometry\, the method of WL S fiber integration\, and the optical transport properties of the scintill ator and fiber.\nIn this report\, experimental and Monte Carlo studies of scintillator strips with Kuraray Y-11 double-clad WLS fiber readout are pr esented. The light yield was measured for strips of various geometries to compare their optical performance. A dedicated study using extruded strips with 10×40 mm² cross sections from different manufacturers\, with diffe rent fiber integration methods\, determined the effective length of the WL S fiber segment where photon capture occurs\, found to be approximately 4 cm — a result reproduced by an optical Monte Carlo model in good agreeme nt with the experimental data.\nMonte Carlo simulations were also used to study the timing characteristics of photon propagation in double-clad Kura ray Y-11 WLS fibers\, comparing 1 mm and 2 mm fiber diameters as well as s traight and loop configurations.\nThe obtained results characterize the in fluence of strip geometry\, fiber integration methods\, and fiber configur ation on light collection and photon timing\, providing experimental and s imulation input for the optimization of scintillator strips and WLS fiber readout for the future AGORA muon system and other physics facilities.\n\n https://indico.particle.mephi.ru/event/626/contributions/6380/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6380/ END:VEVENT BEGIN:VEVENT SUMMARY:Studies of anomalously long-delayed afterpulses in vacuum photomul tipliers DTSTART;VALUE=DATE-TIME:20261030T143000Z DTEND;VALUE=DATE-TIME:20261030T144500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6394@cern.ch DESCRIPTION:Speakers: Nikita Ushakov (INR RAS)\nWe report a systematic stu dy of afterpulses with anomalously long delays in photomultiplier tubes (P MTs) with photocathode diameters ranging from 0.75 inch (Philips/HZC XP191 1) to 20 inch (Hamamatsu R12860 and NNVT N6205). Our studies reveal a clea r dependence of the afterpulse delay on the PMT geometry\, specifically on the distance between the photocathode and the first dynode\; for the Hama matsu R12860\, for instance\, this delay reaches 260 µs. These measuremen ts are motivated by large-scale neutrino detectors\, where delayed afterpu lses can mimic genuine neutron-capture signals and produce accidental coin cidences with preceding positron events\, thereby degrading sensitivity to neutrinos.\n\nThe amplitudes of such afterpulses remain at the single-pho toelectron level\, and their probability is below 0.1% per photoelectron. The observed delay times and the absence of dependence on the operating vo ltage indicate that these afterpulses cannot be satisfactorily explained w ithin the standard ion-feedback model. Their characterization is essential for reliable background suppression and event reconstruction in large neu trino telescopes\, and further studies are needed to clarify their origin. \n\nhttps://indico.particle.mephi.ru/event/626/contributions/6394/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6394/ END:VEVENT BEGIN:VEVENT SUMMARY:Charge-exchange straggling and correlated A–E reconstruction for heavy-ion isotope identification in silicon detectors DTSTART;VALUE=DATE-TIME:20261030T161500Z DTEND;VALUE=DATE-TIME:20261030T163000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6376@cern.ch DESCRIPTION:Speakers: Andrei Azhakin (Faculty of Physics\, Lomonosov Mosco w State University)\nIsotope identification in multilayer silicon detector s requires joint reconstruction of mass number A and energy E. Different A –E pairs may yield nearly identical mean profiles\, while deposited-ener gy fluctuations limit isotope separation. For partially stripped ions\, st ochastic electron capture and loss alter the charge state and add charge-e xchange fluctuations\, requiring explicit modeling.\n\nWe developed a Gean t4 framework combining GLOBAL capture/loss cross sections\, Mott-corrected δ-electron production\, and secondary-electron transport in general geom etries. To our knowledge\, no existing code provides this combination at t he level of detector energy deposition. MOCADI models charge-state evoluti on and projectile energy loss in beam lines\, but not deposited energy. We also developed an N-dimensional likelihood reconstruction of A and E usin g total deposition and correlated layer profiles. Beyond xenon\, simulatio ns predict non-Gaussian\, sometimes multi-peaked ΔE distributions in thin silicon\, where charge-exchange mean free paths can match typical 300–1 000 μm layer thicknesses while ions remain partially stripped.\n\nhttps:/ /indico.particle.mephi.ru/event/626/contributions/6376/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6376/ END:VEVENT BEGIN:VEVENT SUMMARY:Proposal of Prompt Gamma-ray detection system for Boron Neutron Ca pture Therapy based on fast inorganic scintillators DTSTART;VALUE=DATE-TIME:20261030T163000Z DTEND;VALUE=DATE-TIME:20261030T164500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6393@cern.ch DESCRIPTION:Speakers: Alexey Konotop (National Research Nuclear University "MEPhI"\, National Research Center "Kurchatov Institute")\nPrompt gamma-r ay (PG) detection is a powerful method of the irradiation monitoring in Bo ron Neutron Capture Therapy (BNCT). Combination of intensity and position information gives a radiologist complementary information about tissues in jure that allows to clarify the treatment plan.\nExisting PG imaging syste ms are based on expansive materials with relatively weak radiation hardnes s. Here we propose an alternative system based on the inorganic scintillat ors and present the first results with LYSO(Ce) crystals coupled to SiPM p hotodetectors.\n\nhttps://indico.particle.mephi.ru/event/626/contributions /6393/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6393/ END:VEVENT BEGIN:VEVENT SUMMARY:Slow control system at the RED-100 experiment DTSTART;VALUE=DATE-TIME:20261030T160000Z DTEND;VALUE=DATE-TIME:20261030T161500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6392@cern.ch DESCRIPTION:Speakers: Andrei Galavanov ()\nCoherent elastic neutrino-nucle us scattering (CEvNS) was theoretically predicted in 1974 within the frame work of the Standard Model of particle physics. It was experimentally obse rved for the first time only in 2017 by the COHERENT collaboration. The RE D-100 two-phase emission detector was developed to study CEvNS on Xe and A r nuclei.\nDetector operation at a nuclear power plant in 2021-2022 demons trated the need for significantly increased automation of the experimental setup. At this talk discusses the current status of the experiment's slow control system\, specifically the management and optimization of the work ing gas circulation and purification processes\, as well as the liquid nit rogen flows used for detector cooling.\n\nhttps://indico.particle.mephi.ru /event/626/contributions/6392/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6392/ END:VEVENT BEGIN:VEVENT SUMMARY:Magnetic field compensation system for the Baksan large neutrino t elescope DTSTART;VALUE=DATE-TIME:20261030T083000Z DTEND;VALUE=DATE-TIME:20261030T084500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6395@cern.ch DESCRIPTION:Speakers: Arslan Lukanov ()\nThe Baksan large neutrino telesco pe is a large-scale liquid scintillation detector under development at the Baksan neutrino observatory of the Institute for Nuclear Research of the Russian Academy of Sciences. The detector will employ a large number of ph otomultiplier tubes (PMTs). The Earth's magnetic field can significantly a ffect PMT perfomance and\, consequently\, the energy and timing characteri stics of the detector. Therefore\, a magnetic field compensation system is required to ensure stable operation of the photodetectors.\nThe influence of the Earth's magnetic field on the Hamamatsu R7081-100 WA-S70 PMT\, sel ected for the 5-ton BLNT prototype\, was experimentally investigated. The measurements were performed under controlled magnetic fields generated by Helmholtz coils.The PMT gain\, peak-to-valley ratio of the single-photoele ctron charge spectrum\, and transit-time characteristics were studied as f unctions of the magnetic field components. The results demonstrate that ma gnetic fields of the order of 0.1 G can already affect the PMT response. T hus\, developing a magnetic field compensation system is a necessary task. \nThe developed system provides an active approach for producing a homogen eous compensating magnetic field over a large detector volume.\n\nhttps:// indico.particle.mephi.ru/event/626/contributions/6395/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6395/ END:VEVENT BEGIN:VEVENT SUMMARY:Estimation of the reliability of detecting linear point structures in two-dimensional distributions of experimental data based on the Hough transform DTSTART;VALUE=DATE-TIME:20261030T101500Z DTEND;VALUE=DATE-TIME:20261030T103000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6389@cern.ch DESCRIPTION:Speakers: Amina Guseinova ()\nUnusual rectangular structures w ere observed for the first time using a resulting fragment mass–mass mat rix in experiments on the FOBOS spectrometer studying the spontaneous fiss ion of 248Cm and 252Cf nuclei. These structures are associated with a larg e "missing" mass and are bounded by magic nuclei\, and they were interpret ed as a manifestation of a new exotic decay mode – triple collinear clus ter decay (TCCD). These pioneering results have been repeatedly confirmed and refined in a series of subsequent experiments. At the stage of interpr eting the obtained data\, an assessment of the statistical reliability of the aforementioned linear structures in the mass–mass distribution of th e registered fragments is required.\n\nThis report presents the results of a comparison between assessments of the statistical reliability of point linear structures using the standard Hough transform and a modified Hough transform that offers greater robustness to noise and outliers. In the cla ssical Hough method\, each experimental point is treated as a point source of votes in parameter space. To reduce the influence of extreme points\, random points are generated inside a bounding circle\, which lowers the pr obability of false maxima along diagonal directions. However\, this approa ch does not account for finite measurement accuracy. In this work\, a Houg h method has been implemented in a way that each experimental point is rep resented by a circle whose radius corresponds to the measurement uncertain ty. The sought line is then treated as a band of finite thickness (greater than one pixel). Such a band may fully or partially overlap the "smeared" point. The simulation was carried out on a 100×100 pixel field with appr oximately 25 random points generated. During voting\, partial intersection s of the line band with the uncertainty regions of the points were taken i nto account. The results of both methods were compared. It is shown that t he probability of a random occurrence of linear structures on the plane do es not exceed 2% for either method.\n\nhttps://indico.particle.mephi.ru/ev ent/626/contributions/6389/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6389/ END:VEVENT BEGIN:VEVENT SUMMARY:Comparison of the GCV method and a subjective optimality criterion in the problem of determining the velocity of a heavy ion using a semicon ductor detector (PIN diode) DTSTART;VALUE=DATE-TIME:20261030T100000Z DTEND;VALUE=DATE-TIME:20261030T101500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6388@cern.ch DESCRIPTION:Speakers: Alina Kalish (Lomonosov Moscow State University)\nTh is paper presents a statistical comparison of two methods for determining the velocity of a heavy ion using a semiconductor detector (PIN diode): th e method based on a subjective optimization criterion that employs the mat hematical formalism of subjective modeling (MFSM) proposed by Yu. P. Pytye v\, and the generalized cross-validation (GCV) method. The MFSM makes it p ossible to formulate mathematically both a subjective model of the object under study and a subjective mathematical model of its measurements and th eir subjective interpretation. Using the MFSM\, one can mathematically for malize the subjective judgments of the researcher-modeler regarding the ph ysical properties of the object under study\, the means of its measurement \, the mathematical properties of noise\, and so on\; all such subjective information is based on the researcher-modeler's scientific experience and scientific intuition. The GCV (Generalized Cross-Validation) method is a statistical method used to select the regularization parameter when solvin g ill-posed problems\, smoothing data\, or reconstructing signals. GCV hel ps to efficiently estimate noise and to choose smoothing in problems where direct estimation of parameters is difficult. A computational experiment has been carried out that simulates the acquisition of a signal at the det ector with a halved ion registration rate\, which makes it possible to ass ess how sensitive the two compared methods are to the sampling rate of the recording equipment.\n\nhttps://indico.particle.mephi.ru/event/626/contri butions/6388/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6388/ END:VEVENT BEGIN:VEVENT SUMMARY:Electromagnetic calorimeter PHOS256 current status\, performance o n cosmic muons and simulation results DTSTART;VALUE=DATE-TIME:20261030T093000Z DTEND;VALUE=DATE-TIME:20261030T094500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6381@cern.ch DESCRIPTION:Speakers: Dmitry Averyanov (NRC "Kurchatov Institute")\nHomoge neous calorimeters based on scintillation single crystals are widely used in high-energy physics due to their good energy\, position and time resolu tion. A small precise 256-channel photon spectrometer (PHOS256) based on PbWO$_4$ crystals is proposed for an experiment at the U-70 accelerator fa cility for measurements of spectra of neutral mesons and direct photons wi th proton\, pion\, and kaon beams of momenta 26.5–50 GeV/*c* on nuclear targets.\n\nSuch a detector can also be used for measurements of the linea r photon polarization using photon conversion into e+e- pair on a dedicate d converter in front of the calorimeter via analyzing an asymmetry of clus ters containing both particles. The calorimeter’s design is optimized us ing simulations with the Pythia and Geant4 packages. The calorimeter const ruction will be discussed - the PbWO$_4$ crystals\, the avalanche photodet ectors attached to the crystals\, the main electronics\, and the cooling e quipment. The reconstruction of photon pairs from π$^0$ mesons and η mes ons will be considered to determine the optimal calorimeter position.\n\nF irst results on the detector response to the cosmic muons and the comparis on with results of Monte-Carlo simulations will be presented.\n\nhttps://i ndico.particle.mephi.ru/event/626/contributions/6381/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6381/ END:VEVENT BEGIN:VEVENT SUMMARY:Using LHC real-time information for ALICE FT0 Operation during Run 3 DTSTART;VALUE=DATE-TIME:20261030T091500Z DTEND;VALUE=DATE-TIME:20261030T093000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6379@cern.ch DESCRIPTION:Speakers: Mikhail Sukhanov (INR RAS\, MEPhI)\nThe LHC Run 3 co ncluded in June 2026. Over nearly four years of operation\, the ALICE expe riment [1] collected $\\sim$150 pb$^{-1}$ of $\\text{pp}$ and $\\sim$6.9 n b$^{-1}$ of the first $\\text{Pb}{-}\\text{Pb}$ collisions data\, exceedin g the cumulative dataset from previous Run 1 and Run 2. This period was al so remarkable for the new\nlight-ion program\, featuring the first $\\text {Ne}{-}\\text{Ne}$ and $\\text{O}{-}\\text{O}$ collisions at the LHC.\n\nT wo of the new ALICE detectors\, Inner Tracking System (ITS) and FT0 – a Cherenkov\ndetector within the Fast Interaction Trigger (FIT) [2] system – have become essential for data taking. Both are widely used for event selection\, particularly based on the vertex position in recent Run 3 anal ysis. Moreover\, the FT0 data is a source for multiplicity classification in $\\text{pp}$ collisions and centrality classification in various ion co llision systems. In addition\, the FT0 serves as the primary ALICE luminom eter in pp collisions and the machine background intensity estimator for t he ALICE experiment. These capabilities of the FT0 detector are enabled by the high performance of the front-end electronics and its integration wit h the FIT Detector Control System (DCS) [3]\, which allows for the correct ion of trigger counts based on the LHC filling scheme.\n\nThis talk is dev oted to the integration of the LHC interface signals with FT0 DCS. This co nnection enabled the Run 3 instantaneous luminosity measurement\, online b ackground estimator and other automated algorithms\, ultimately contributi ng to the excellent performance of the FT0.\n\n**References**\n\n 1. ALICE upgrades during the LHC Long Shutdown 2 / S. Acharya [et al.] // Journal of instrumentation.\n– 2024. – Vol. 19\, no. 05. – P05062. doi: http s://doi.org/ 10.1088/1748-0221/19/05/P05062\n 2. Slupecki M. Fast Interact ion Trigger for ALICE upgrade //Nuclear Instruments and Methods in Physics \nResearch Section A: Accelerators\, Spectrometers\, Detectors and Associa ted Equipment. – 2022. – Vol.1039. – P.167021. doi: https://doi.org/ 10.1016/j.nima.2022.167021\n 3. ALICE fast interaction trigger detector co ntrol system for the LHC Run 3 // M. Sukhanov [et al.] //\nInternational J ournal of Modern Physics E. – 2026. – Vol. 35. – P.2641008. doi: htt ps://doi.org/10.1142/S0218301326410089\n\nhttps://indico.particle.mephi.ru /event/626/contributions/6379/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6379/ END:VEVENT BEGIN:VEVENT SUMMARY:Comparative analysis of signal time measurement from the wave-form . DTSTART;VALUE=DATE-TIME:20261030T094500Z DTEND;VALUE=DATE-TIME:20261030T100000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6374@cern.ch DESCRIPTION:Speakers: Andrei Kuznetsov (JINR)\nThe front-end electronics o f the modern experiments is often designed with the use of sampling ADC. T he signal wave-form measured by such electronics carries information about the basic parameters of the signal of interest\, its amplitude and time. Timing measurement of the sampled wave-form is a challenging task\, especi ally when one aims for nanosecond and sub-nanosecond resolution having the sampling rate of tens MHz.\n\nUsing data from the ALICE electromagnetic c alorimeter PHOS\, we develop and compare algorithms for the signal timing measurement. The comparison was performed on small samples. Both classical data comparison algorithms and bootstrap techniques are used. The develop ed methods of timing measurement are considered as an important input towa rds precision measurements of signal time in high-energy experiments.\n\nh ttps://indico.particle.mephi.ru/event/626/contributions/6374/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6374/ END:VEVENT BEGIN:VEVENT SUMMARY:CONCEPT OF THE MUON DETECTOR FOR THE SPASCHARM FACILITY AT THE U-7 0 ACCELERATOR COMPLEX OF THE NRC "KURCHATOV INSTITUTE" - IHEP DTSTART;VALUE=DATE-TIME:20261030T084500Z DTEND;VALUE=DATE-TIME:20261030T090000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6373@cern.ch DESCRIPTION:Speakers: Rinat Fakhrutdinov (NRC "Kurchatov institute" - IHEP )\nThe conceptual design of the SPASCHARM facility [1] calls for its reloc ation to channel No. 24 of the U-70 Accelerator Complex\, with a muon dete ctor positioned at the end of the facility. This detector is required to i dentify J/ψ particles via their decay into two muons (μ+μ−) and subse quently to search for χc2 (spin 2) and χc1 (spin 1) through their decays into J/ψ + γ\, with the ultimate goal of measuring the gluon contributi on to the proton spin. This paper presents the concept for the muon detect or's construction. The proposed design comprises three pairs of tracking p lanes with a total area of ~12 m²\, interleaved with steel filters assemb led from disks approximately 4 m in diameter and 220 mm thick. Each pair o f tracking planes consists of two identical planes oriented orthogonally t o one another\, and each such plane is in turn composed of two layers of d rift tubes housed in aluminum tubes 3.7 m long with an inner diameter of 5 0 mm.\nOpenings of ~20 × 20 cm² are provided in the central regions of t he steel disks and tracking planes\, coaxial with the primary proton beam\ , to prevent the tracking planes from being overloaded by primary protons and the products of their interaction with the steel disk material.\n\nhtt ps://indico.particle.mephi.ru/event/626/contributions/6373/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6373/ END:VEVENT BEGIN:VEVENT SUMMARY:Longevity studies of the CMS cathode strip chambers with GIF++ DTSTART;VALUE=DATE-TIME:20261030T090000Z DTEND;VALUE=DATE-TIME:20261030T091500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6370@cern.ch DESCRIPTION:Speakers: Dmitrii Kozlov ()\nRadiation hardness studies of the CMS detector's cathode strip chambers have been conducted at the GIF++ ga mma irradiation facility at CERN since 2016. During the studies\, ME1/1 an d ME2/1 chambers\, which differ in design and operate in CMS under high ba ckground rate\, were subjected to intense irradiation. The accumulated cha rge per unit length of the anode wire reached 1030 mC/cm for ME2/1 and 117 0 mC/cm for ME1/1\, which is more than three times higher than the integra l dose expected for the entire period of HL-LHC operation. The characteris tics of the chambers were studied periodically in tests with SPS muon beam s. There are no signs of radiation-induced degradation of the chambers. Th e data obtained confirm the high radiation hardness of cathode strip chamb ers for operation in extreme conditions of HL-LHC.\n\nhttps://indico.parti cle.mephi.ru/event/626/contributions/6370/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6370/ END:VEVENT BEGIN:VEVENT SUMMARY:Progress in the R&D of the ASHIPH counter based on silicon photomu ltipliers for the SND detector DTSTART;VALUE=DATE-TIME:20261030T073000Z DTEND;VALUE=DATE-TIME:20261030T074500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6391@cern.ch DESCRIPTION:Speakers: Robert Efremov (Budker Institute of Nuclear Physics of Siberian Branch Russian Academy of Sciences (BINP SB RAS))\nTo increase particle identification quality in the Spherical Neutral Detector (SND) a t the VEPP-2000 electron-positron collider\, we propose upgrading the ASHI PH (Aerogel\, SHifter\, PHotomultiplier) Cherenkov counters. With the repl acement of the current microchannel-plate photomultipliers (MCP-PMTs) with silicon photomultipliers (SiPMs)\, we expect the number of detected photo ns per particle to increase by a factor of 2.5.\nThe front-end electronics (FEE) for an array of five SiPMs were developed. The SiPM array calibrati on procedure and its results are presented\, and the array homogeneity is estimated. The results of testing the FEE together with a thermal stabiliz ation system inside the SND detector are reported. An ASHIPH-SiPM counter prototype was developed and investigated with a test electron beam to stud y the light-collection inhomogeneity across the counter. Results for both aerogels (refractive indices n = 1.05 and n = 1.13) are presented. The est imated π/K separation quality is about 6σ.\n\nhttps://indico.particle.me phi.ru/event/626/contributions/6391/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6391/ END:VEVENT BEGIN:VEVENT SUMMARY:Noble Element Simulation Techniquie (NEST): status and updates DTSTART;VALUE=DATE-TIME:20261030T074500Z DTEND;VALUE=DATE-TIME:20261030T080000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6390@cern.ch DESCRIPTION:Speakers: Ekaterina Kozlova (Westlake University)\nNoble eleme nt detectors (two-phase emission detectors\, liquid phase-only detectors\, etc.) have many applications in modern research.\nFor example\, they are broadly used in dark matter registration\, non-standard neutrino interacti ons searches and even Standard Model processes observation (CEvNS). Modeli ng signal generation from these complicated interactions requires precise simulations. The main problem of modeling such phenomena is that various t heoretical predictions are inconsistent with each other and compared to ex perimental data.\n\nIn this talk\, the current status of NEST: Noble Eleme nt Simulation Technique\, which is a simulation package dedicated to respo nse of noble elements (xenon and argon) will be discussed and applicabilit y to high energy ranges will be demonstrated.\nAlso updated models on argo n will be discussed\, including S1 pulse shaping models.\n\nhttps://indico .particle.mephi.ru/event/626/contributions/6390/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6390/ END:VEVENT BEGIN:VEVENT SUMMARY:Exact Event Time Reconstruction for Time-of-Flight Particle Identi fication DTSTART;VALUE=DATE-TIME:20261030T071500Z DTEND;VALUE=DATE-TIME:20261030T073000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6385@cern.ch DESCRIPTION:Speakers: Semyon Yurchenko (Saint Petersburg State University\ , Laboratory of ulta-high energy physics)\nPrecise determination of the ev ent collision time t_{0} is essential for particle identification with tim e-of-flight detectors. In the ALICE experiment\, the event time can be rec onstructed from measured TOF signals by comparing them with expected fligh t times under different particle-mass hypotheses [1\,2]. The corresponding optimization problem is combinatorial\, and practical reconstruction proc edures therefore employ restricted hypothesis searches and rejection crite ria. \n\nWe present an exact polynomial-time method for global minimizatio n of the event-time objective function. The algorithm determines the optim al particle hypotheses together with the corresponding t0 without exhausti ve enumeration of all hypothesis assignments. The method was validated aga inst brute-force enumeration at low multiplicity\, where identical particl e assignments\, event times\, and objective-function values were obtained. It was further benchmarked against the event-time reconstruction procedur e implemented in the ALICE O2 framework [3\,4] using simulated pp and Pb-P b events. For typical events\, the optimized O2 procedure remains highly c ompetitive in execution time\, while the exact method provides a guarantee d global optimum and can therefore serve as a reference for validating heu ristic reconstruction approaches. \n\nWe also demonstrate ambiguous event configurations for which the restricted search converges to a suboptimal s olution\, producing a shifted reconstructed event time and incorrect parti cle assignments\, whereas the exact algorithm recovers the global minimum. The proposed method can therefore be used both as a validation tool and a s a component of future hybrid event-time reconstruction algorithms.\n\nRe ferences\n\n[1] ALICE Collaboration\, “Determination of the event collis ion time with the ALICE detector at the LHC\,” European Physical Journal Plus 132\, 99 (2017). doi:10.1140/epjp/i2017-11279-1\n\n[2] A. Alici for the ALICE Collaboration\, “Particle identification with the ALICE Time-O f-Flight detector at the LHC\,” Nuclear Instruments and Methods in Physi cs Research A 766\, 288–291 (2014). doi:10.1016/j.nima.2014.05.059\n\n[3 ] G. Eulisse and D. Rohr for the ALICE Collaboration\, “The O2 software framework and GPU usage in ALICE online and offline reconstruction in Run 3\,” EPJ Web of Conferences 295\, 05022 (2024). doi:10.1051/epjconf/2024 29505022\n\n[4] ALICE O2\, TOF EventTimeMaker implementation and documenta tion. EventTimeMaker.h\n\nhttps://indico.particle.mephi.ru/event/626/contr ibutions/6385/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6385/ END:VEVENT BEGIN:VEVENT SUMMARY:Development status of the Highly Granular Neutron Detector for th e BM@N Experiment DTSTART;VALUE=DATE-TIME:20261030T060500Z DTEND;VALUE=DATE-TIME:20261030T062500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6378@cern.ch DESCRIPTION:Speakers: Dmitry Finogeev ()\nA new highly granular time-of-fl ight neutron detector (HGND) is being developed and constructed for the BM @N (Baryonic Matter at the Nuclotron) experiment to identify neutrons and measure their energies in heavy-ion collisions at beam energies of up to 4 AGeV. The HGND consists of two arms\, each with 8 active layers\, each of 11×11 plastic scintillator cells 4×4×2.5 cm³ with direct light readou t by silicon photomultipliers EQR15 11-6060D-S and copper absorber plates with thickness 3 cm in between. The detector readout electronics is based on a custom-developed board featuring a 100 ps FPGA-based time-to-digital converter (TDC). The complete HGND readout system will comprise eight such boards\, each equipped with three Kintex-7 FPGAs and capable of reading o ut 248 channels.\nA fully functional 34-channel detector prototype\, corre sponding to one quarter of a single active layer\, was tested using cosmic muons and the LPI electron beam. In addition\, a two-channel prototype wa s integrated into the BM@N data-acquisition system\, including full-chain readout functionality\, and tested during the run in April of this year.\n Details of the HGND development\, readout topology and test results will b e presented.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6 378/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6378/ END:VEVENT BEGIN:VEVENT SUMMARY:TIME-OF-FLIGHT CORRECTION METHOD FOR SETUPS WITH HEAVY CRYSTALS DTSTART;VALUE=DATE-TIME:20261030T062500Z DTEND;VALUE=DATE-TIME:20261030T064500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6377@cern.ch DESCRIPTION:Speakers: Natalia Zhigareva (NRC KI)\nIn nucleus-nucleus colli sions at energies up to 2 GeV\, neutrons constitute a significant fraction of\nsecondary particles. For their registration and identification\, it i s proposed to use modules of a High\nGranularity Neutron Detector (HGND). The detector has a layered structure\, where each active\nlayer consists o f individual cells. This work considers the possibility of replacing passi ve layers\nwith active layers made of a high-density scintillator — bism uth orthogermanate Bi₄Ge₃O₁₂ (BGO).\nHowever\, the use of BGO for time-of-flight (TOF) measurements is complicated by the long signal\nrise time (>100 ns) and requires the development of specialized electronics (am plifier). The report\npresents a time-of-flight data analysis method appli ed to data obtained during testing of a BGO\ncrystal with the developed am plifier on an experimental test bench. Additionally\, the results of\nsimu lations of a prototype detector based on BGO crystals are presented.\n\nht tps://indico.particle.mephi.ru/event/626/contributions/6377/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6377/ END:VEVENT BEGIN:VEVENT SUMMARY:ACTS-based reconstruction for a straw-tube forward tracker in MPD DTSTART;VALUE=DATE-TIME:20261030T064500Z DTEND;VALUE=DATE-TIME:20261030T070000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6371@cern.ch DESCRIPTION:Speakers: Nazar Burmasov (NRC «Kurchatov Institute» - PNPI)\ nA straw-tube forward tracking detector is being considered for the second stage of the Multi-Purpose Detector (MPD) at the NICA collider. It would extend the MPD acceptance to forward rapidities and broaden the accessible physics program. In central heavy-ion collisions\, high hit density and g host hits create a large combinatorial background\, making robust track re construction challenging. We present recent developments of the ACTS-based reconstruction aimed at improving its performance in this environment.\n\ nRecent work focused on two stages that were found to limit the reconstruc tion performance: space-point creation and track seeding. The space-point algorithm combines measurements from stereo-crossed straw layers. Its ambi guity resolution was studied using a graph neural network\, and the determ inistic selection was subsequently optimized to improve the balance betwee n reconstruction efficiency and background suppression. In parallel\, a cu stom seeding algorithm was developed to exploit space points from all five tracking stations\, instead of the three fixed stations used in the previ ous ACTS-based setup. This makes seed reconstruction less sensitive to mis sing or ambiguous space points in individual stations.\n\nWith these impro vements\, high reconstruction efficiency for trackable primary pions is ac hieved in central Au-Au events at $\\sqrt{s_{\\rm{NN}}}=11$ GeV simulated with UrQMD\, while maintaining high reconstructed-track purity. Further de velopments will include matching with the forward TOF detector to study it s potential for additional ghost suppression.\n\nhttps://indico.particle.m ephi.ru/event/626/contributions/6371/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6371/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of two-phase emission detector technology for monitori ng nuclear reactor cores using the effect of coherent elastic scattering o f reactor neutrinos off nuclei DTSTART;VALUE=DATE-TIME:20261028T140000Z DTEND;VALUE=DATE-TIME:20261028T142000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6368@cern.ch DESCRIPTION:Speakers: Alexander Bolozdynya (NRNU MEPhI)\nThe fundamental p rocess of coherent elastic neutrino-nucleus scattering (CEvNS) has been pr edicted based on the Standard Model of elementary particles and interactio ns more than 40 years ago. For heavy nuclei\, the cross-section of this pr ocess exceeds (in more than two orders of magnitude) the cross-sections of other known low-energy neutrino interaction processes such as inverse bet a decay and neutrino scattering off atomic shell electrons. This interacti on channel plays a significant role in Universe processes accompanied by i ntensive neutrino fluxes and can be used to monitor the state of nuclear r eactor cores enhancing nuclear power safety. The CEvNS process was first d etected in an accelerator experiment in 2017 by the international COHERENT collaboration\, in whose work some of the authors of this project partici pate. Detecting the CEvNS process for reactor neutrinos is a significantly more challenging task\, as the energy release from elastic coherent scatt ering off heavy atomic nuclei does not exceed a few hundred eV. At the Int er-departmental Laboratory for Experimental Nuclear Physics of NRNU MEPhI the RED-100 cryogenic two-phase emission detector has been developed and c onstructed to study the CEvNS process for reactor electron antineutrinos. The detector is based on a technology first proposed at MEPhI approximatel y 50 years ago and currently used worldwide in experiments searching for d ark matter particles in the Universe.\n In 2020–2022 the RED-100 d etector\, utilizing ~200 kg of liquid xenon as working medium\, underwent testing at the Kalinin Nuclear Power Plant. The experiment demonstrated th at the reactor neutrino detection technology developed at NRNU MEPhI is ca pable of detecting the CEvNS effect in a nuclear power plant environment. This study provided the best current upper limit on the CEvNS cross-secti on for xenon nuclei\, which is consistent with the Standard Model. Prepara tory work has since been carried out for an experiment using a modified ve rsion of the RED-100 detector aimed at detecting reactor neutrinos via the CEvNS interactions with argon nuclei serving as the neutrino target.\n An analysis of the results from the first experiment using liquid xeno n as the working medium of the RED-100 (2020–2022)\, combined with labor atory tests of the RED-100 using liquid argon (2025–2026)\, has shown th at using argon atoms as a target for reactor neutrinos will enable reliabl e observation of the CEvNS effect. To verify this conclusion\, it is propo sed to conduct the second test of the RED-100 setup with liquid argon work ing medium at the Kalinin NPP. This project aims to develop independent me thods for the remote monitoring of the active core of NPP reactors.\n\nhtt ps://indico.particle.mephi.ru/event/626/contributions/6368/ LOCATION: Conference Hall 3 URL:https://indico.particle.mephi.ru/event/626/contributions/6368/ END:VEVENT BEGIN:VEVENT SUMMARY:SPRINT project at NICA DTSTART;VALUE=DATE-TIME:20261028T125000Z DTEND;VALUE=DATE-TIME:20261028T131000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6367@cern.ch DESCRIPTION:Speakers: Vladimir Ladygin (JINR)\nThe study of the spin effec ts and polarization phenomena in hadronic reactions requires the develop ment of high intensity polarized beams\, polarized targets\, beam and f ocal polarimetry\, systems of the spin manipulation and control as for the current spin experiments at the fixed targets as well as for the planned SPD experiment in collider mode at the Nuclotron/NICA complex.\n The mai n goals of the SPRINT@NICA project is to provide the spin transparen cy regime for polarized protons and deuterons over whole energy range of N uclotron and NICA\, further development of the Source of Polarized Ions with corresponding deuteron and proton beam polarimeters\, development of the polarized 3He target and beam. The extension of the spin program t o the search of axion-like particles\, measurement of the EDM with beams of polarized protons and deuterons is planned. First line experiments on the deteron and proton spin manipulation are discussed.\n\nhttps://indi co.particle.mephi.ru/event/626/contributions/6367/ LOCATION: Conference Hall 3 URL:https://indico.particle.mephi.ru/event/626/contributions/6367/ END:VEVENT BEGIN:VEVENT SUMMARY:Cosmic muon flux measurements from mid-latitude to Antarctica with a novel nested plastic scintillator detector DTSTART;VALUE=DATE-TIME:20261028T131000Z DTEND;VALUE=DATE-TIME:20261028T133000Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6366@cern.ch DESCRIPTION:Speakers: Ozturk Sertac (Istinye University)\nWe present cosmi c muon flux measurements performed across two geomagnetically distinct env ironments with a novel concentric double-layer plastic scintillator telesc ope\, developed and produced entirely in-house. The detector employs a nes ted geometry in which a cylindrical active core is coaxially enclosed by a cup-shaped outer scintillator\, so that coincidence between the two optic ally isolated volumes provides active background rejection and wide-angle acceptance within a portable\, two-channel package. Both volumes were cast from a custom epoxy-resin matrix doped with PPO and POPOP\, a liquid-phas e route that removes the need for geometry-specific glass moulds and permi ts complex shapes such as the outer cup\, which would be difficult and cos tly to machine from commercial scintillator blocks. GEANT4 simulations giv e a geometric factor of 60.6 cm²sr\, in agreement with the Sullivan analy tical prediction to within 2% and approximately three times that of a conv entional flat two-panel telescope built from the same detector diameters. The nested geometry exhibits no hard angular cut-off\, and its coincidence efficiency is flat from 50 MeV to 50 GeV\, so that soft muons below 1 GeV /c are registered without loss.\n\nThe system was deployed during the 10th Turkish Antarctic Expedition\, with measurements taken at a mid-latitude baseline in Istanbul and at Horseshoe Island\, Antarctica. After barometri c correction the Antarctic flux exceeds the Istanbul baseline by approxima tely 41%\, consistent with the reduced geomagnetic cut-off rigidity at pol ar latitudes and with an appreciable soft-component response\, the latter independently supported by a barometric coefficient ratio of about 3.3 bet ween the two sites. A Forbush decrease was also recorded in Istanbul\, coi nciding with a Kp ≈ 8 geomagnetic storm driven by a coronal mass ejectio n and corroborated by simultaneous neutron monitor data. Pre- and post-exp edition fluxes agree within statistical uncertainty\, indicating that inte rcontinental transport did not affect the detector response.\n\nThe talk a dditionally reports on the wider scintillator development programme from w hich this instrument emerged: the optical and scintillation characterisati on of the epoxy-resin material against commercial scintillators\, laborato ry results on formulations engineered for pulse-shape discrimination inclu ding lithium-tetraborate nanoparticle loading for thermal-neutron sensitiv ity\, and a Monte Carlo feasibility study of opaque plastic scintillators for muon tomography.\n\nhttps://indico.particle.mephi.ru/event/626/contrib utions/6366/ LOCATION: Conference Hall 3 URL:https://indico.particle.mephi.ru/event/626/contributions/6366/ END:VEVENT BEGIN:VEVENT SUMMARY:The "Neutron Beta Decay" installation for the reactor PIK DTSTART;VALUE=DATE-TIME:20261028T133000Z DTEND;VALUE=DATE-TIME:20261028T134500Z DTSTAMP;VALUE=DATE-TIME:20261025T175038Z UID:indico-contribution-325-6365@cern.ch DESCRIPTION:Speakers: Alexey Fomin (PNPI NRC KI)\nThe neutron instrument c omplex "Neutron Beta Decay" is currently being manufactured to be located on the beam of polarized cold neutrons on the GEK-3 N0 channel. The facili ty is designed to measure the electron\, neutrino\, and electron-neutrino asymmetries of neutron beta decay. The experiment is necessary because the results of the most recent\, most precise neutron decay experiments\, con ducted at an accuracy level of 10$^{−3}$\, cannot be described within th e Standard Model. The basis of the facility is a superconducting solenoid\ , which generates a uniform magnetic field of 0.35 T. Electrons and proton s produced during neutron decay move in a magnetic field along magnetic fi eld lines. To select a specific electron emission angle\, a magnetic mirro r effect is used by creating a region with a stronger magnetic field\, wit h an induction of 0.88 T. The decay region is selected by protons\, which are further accelerated by an electric field. This is achieved by using an electrostatic system that increases the voltage in the decay region to 30 kV. Detectors at the input and output of the neutron beam are used to rec ord the electrons and protons. The aim of the experiment is to improve the accuracy of measuring correlation coefficients by ~3 times. Comprehensive simulation of the experiment was carried out.\n\nhttps://indico.particle. mephi.ru/event/626/contributions/6365/ LOCATION: Conference Hall 3 URL:https://indico.particle.mephi.ru/event/626/contributions/6365/ END:VEVENT END:VCALENDAR