Some experiments in high energy physics require precision measurement of some process count rate.In those cases one usually just divides the number of events over measurement time. Time information for the events is seldom not used. In this report we discuss few techniques to use time of event arrival to search for anomalies in events and significantly reduce some systematic errors.All...
The report deals with measurements of electron bunch length using coherent backward transition radiation generated by a bunch in a gold target. Such bunches are used in novel compact laser- based acceleration. The aim is to compare efficiently non-polarized and polarized photons backward transition radiation for use in measurement of longitudinal size electron bunch. By calculation, it was...
The new Fast Interaction Trigger (FIT) [1] was developed for the upgrade of the ALICE detector [2] at CERN LHC. FIT will consist of two arrays of Cherenkov radiators (T0+) and a large segmented scintillator ring (V0+). FIT will serve as the main luminometer, as well as the detector which will determine collision time, multiplicity, centrality, and reaction plane in ALICE during Runs 3 and 4....
The Inner Tracking System (ITS) plays a key role in the precise determination of secondary vertices in high energy hadron collisions in ALICE at the LHC. The beam luminosity of the collider will be increased by more than 10 times after the upgrade planned in 2020. This will provide new possibilities of studies of rare processes in high energy hadron collisions including production of...
The characteristics of the calibration quasi-monochromatic beam of secondary electrons of the accelerator S-25R “PAHRA” of the P. N. Lebedev Physics Institute of Russian Academy of Sciences based on the magnet SP-57 are presented. The energy resolution of the beam from a copper converter in the thickness range of 0.1 - 5 mm and the interpolar gap of the magnet 6 cm in the energy range of the...
The application of the platform MICRO TCA standard in physical experiments. Chassis and specialized modules for data acquisition systems. Data storage and transmission systems developed by a Russian company. Construction of distributed systems for data collection and control of physical experiments with the use of Micro-TCA platforms.
Authors: E.S.Kozlova on behalf the NEST collaboration
The Noble Element Simulation Technique (NEST) is a comprehensive mostly-empirical standalone package for complete and accurate simulation both the scintillation light and ionization yields of noble elements for many particle types (nuclear recoil, electron recoil, Kr83, alphas, etc.). Instead of NEST v.1.0, v.2.0 could fully work both as...
Construction of the advanced megascience facilities, basing on advanced particle detector technologies, is closely connected with development of read-out electronics, having as a core element – application specific integrated circuit (ASIC).
In order to reach limit specifications of multichannel detector setups a whole set of factors defines ASIC design. Today application specific chips...
An experiment for measuring the flux of cosmic gamma rays with energy above 100TeV is currently being prepared at the Baksan Neutrino Observatory of the Institute for Nuclear Research, Russian Academy of Sciences. At present the plastic scintillation counters with a total continuous area of 410m^2 are installed in the muon detector (MD) underground tunnels, and they are totally equipped with...
Current gamma-ray and cosmic-ray satellite experiments employ plastic scintillators to discriminate charged and neutral particles and to identify nuclei .
Scintillators are commonly read out using the classical photomultiplier tubes (PMTs).
Recent measurements and R&D projects are demonstrating that Silicon Photomultipliers (SiPMs) are suitable for the detection of fast light signals with...
The new coordinate-tracking detector based on drift chambers (CTUDC) is developed in MEPhI. The detector represents two planes with total area of 30 m2 placed on opposite sides of Cherenkov water detector of 2000 m^3 volume. Each plane consists of 8 large multiwire drift chambers (4000x508x112 mm^3). The key advantages of these chambers are a large effective area (1.85 m^2) and a good...
Liquid Argon Time Projection Chambers (LAr TPCs) are ideal detectors for neutrino experiments, providing both particle track imaging and calorimetry in a dense medium. The sensitivity required by future neutrino physics implies unprecedented detector masses, for which traditional LAr TPC designs face challenges e.g. due to the long drift distances of O(10m). In order to efficiently drift...
The RED100 is a two-phase emission liquid xenon detector to search for rare events such as coherent elastic neutrino nucleus scattering (CEνNS) and neutrinoless double positron decay ( 0ν2β+). To detect these processes detector was specially built to work at ground level laboratory with intensive muon background.The RED100 experimental setup consists of several systems that provide stable...
A new method of high-energy gamma ray incident direction reconstruction is
developed for gamma-ray detectors with multilayered converters. The method uses
data from converter and, if available, from position-sensitive calorimeter to
reconstruct an electromagnetic cascade axis and to determine the incident direction
of a primary gamma. For the first time to find point of intersection of...
Several thousands of gamma-ray bursts were observed by various experiments, but their sources of origin still remain unclear up to now. During several GRBs very high-energy photons were detected both in space and ground-based experiments (up to some tens of GeV and up to some TeV, respectively).
The GAMMA-400 project will be the new generation of satellite gamma-observatory. Three apertures...
Nature of the Dark Matter is one of the most fundamental physics problems. While practically all currently running Dark Matter experiments yield no positive result the DAMA/LIBRA collaboration continues to claim observation of the Dark Matter signal in the NaI(Tl) detector located deep underground. The new data released from the DAMA/LIBRA phase-2 experiment favors presence of a modulated...
Abstract: The Compact Linear Collider (CLIC) is a proposed
high-luminosity linear electron-positron collider at the energy
frontier, designed to be built near CERN, Geneva. To maximize the
physics potential of CLIC a staged approach is adopted with three
distinct energy stages currently assumed to be 380 GeV, 1.5 TeV and 3
TeV. The initial energy stage is optimized for the precise...
The AE$\mathrm{\overline{g}}$IS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is a CERN based experiment aiming to probe the Weak Equivalence Principle of General Relativity with antimatter by studying free fall of antihydrogen in the Earth's gravitational field.
A pulsed cold beam of antihydrogen produced by charge exchange between Rydberg positronium and cold antiprotons...
The Super Charm–Tau factory at the Budker Institute of Nuclear Physics (Novosibirsk, Russia) is an electron-positron collider that will operate in the center-of-mass energy range from 2 to 5 GeV with the peak luminosity of about
$10^{35}$ cm$^{-2}$s$^{-1}$. The main goal of experiments is to study processes with $c$ quark or $\tau$ leptons in the final state.
We'll discuss the physics case...
The Nuclotron-based Ion Collider fAcility (NICA) is a new accelerator complex being constructed at the Joint Institute for Nuclear Research (JINR). The general objective of the project is to provide beams for the experimental study of hot and dense strongly interacting QCD matter. The heavy ion programme includes two planned detectors: BM@N (Baryonic Matter at Nuclotron) – a fixed target...
The WWR-M reactor at NRC «Kurchatov Institute» - PNPI is going to be equipped with an high-density ultracold neutron source. Method of UCN production is based on their accumulation in the superfluid helium at 1.2K temperature. Thus, the source will provide the UCN density at EDM spectrometer equals to ρ= 1.3E4 n/cm3 which is 2 order magnitude greater than the output density of...
The CALICE collaboration develops and tests highly granular calorimeter prototypes for future collider experiments. Scintillator-SiPM-based prototype of the ILD hadron calorimeter was tested with steel and tungsten absorbers using single-particle beams from the CERN SPS. The results of beam tests are presented as well as an application of the software compensation technique for energy...
The long baseline neutrino experiments T2K has obtained a first hint on CP violation in neutrino oscillations and excluded CP conservation at the 95% confidence level. To strengthen this result the T2K collaboration is expected to collect the full exposure of 7.8×1021 protons on target, thanks to planned upgrades to the J-PARC and the neutrino beamline. An upgrade of the T2K near detector...
The Tile Calorimeter (TileCal) of the ATLAS experiment at the LHC is the central hadronic calorimeter designed for the reconstruction of hadrons, jets, tau-particles and missing transverse energy. This sampling calorimeter uses steel plates as absorber and scintillating tiles as active medium. The light produced by the passage of charged particles is transmitted by wavelength shifting fibres...
The procedure of the energy calibration of the highly granulated electromagnetic calorimeter PHOS of the ALICE experiment is presented. PHOS consists of 12544 PbWO4 crystals with Avalanche PhotoDiodes (APD) as photodetectors. It is accompanied by an LED monitoring system and cooling plant which maintains a stable temperature of the crystals at -25$^\circ$ C.
After this latest and new...
Abstract.
Different types of gamma and electron detectors based on registration
of the electromagnetic (EM) cascades are widely used in the modern HEP
experiments. Thus the properties of EM showers are of particular
interest. In this report the new results on the fluctuations of charge particles fluxes in the EM cascades initiated by 10 to 1000
GeV electrons in lead are presented. GEANT4 was...
In the MPDRoot, projective geometry of the Electromagnetic Calorimeter had been developed, also specific classes had been prepared. Using this package, characteristics of the detector had been studied by Monte Carlo methods. We obtained information about energy and spatial resolution as well as registration effectivity for the different clusterisation procedures.
In the August few detector...
The main goal of the NICA/MPD facility is a study of the properties of hot and dense baryonic matter. One of posible ways is to study of strangeness production in nuclear collisions.The enhance production of strange particles in heavy-ion collision is consider to be signal for quarck-gluon plasma formation.In this talk MPD detector abilities to measure different hypernuclei species in Au+Au...
A new measurement of the neutron lifetime, carried out with the aid of a large gravitational spectrometer made in Petersburg Institute of Nuclear Physics (PNPI) is presented. In our experiment the measurement of neutron lifetime is carried out using the method of storing ultracold neutrons in a material trap with gravity barrier. Further improvement of the obtained result can be achieved at...
Overview of the construction and characterisation of the first prototype of large Micromegas chamber “LM2 Module-0” for the upgrade of the ATLAS Muon System is presented.
Performance studies of the detectors with cosmic rays and X-ray source are shown and discussed. Preliminary results of operating the detector under high rate irradiation at the CERN GIF++ irradiation facility and the future...
We plan to develop an advanced Transition Radiation Detector (TRD) for hadron identification in the TeV momentum range, based on the simultaneous measurement of the energies and of the emission angles of the Transition Radiation (TR) X-rays with respect to the radiating particles. To study the feasibility of this project, we have carried out a beam test campaign at the CERN SPS facility with...
The Compressed Baryonic Matter (CBM) experiment at the future Facility for
Antiproton and Ion Research (FAIR) aims to study the properties of nuclear
matter at high net-baryon densities and moderate temperatures.
The Silicon Tracking System (STS) is the key detector to reconstruct with
a high efficiency up to 1000 charged particle trajectories created in heavy-ion
collisions at interaction...
CMS experiment is one of the two general purpose experiments at the LHC pp collider. For LHC Phase-2, the instantaneous luminosity delivered to the experiment will reach $5\times10^{34}$ cm$^{-2}$s$^{-1}$, resulting in high particle fluxes that requires the detectors to be upgraded. The forward regions, corresponding to the endcaps of the detectors, are the most affected parts. In the CMS...
BM@N (Baryonic Matter at the Nuclotron) is the fixed target experiment aimed to study nuclear matter in the relativistic heavy ion collisions at the Nuclotron accelerator in JINR. Detectors based on Gas Electron multipliers (GEM) have been identified as appropriate for the BM@N central tracking system, which is located inside the BM@N analyzing magnet. Cathode Strip Chamber (CSC) is installed...
Performance of the ALICE charge-particle veto detector in pp collisions at 13 TeV
Sergey Evdokimov for the ALICE collaboration
The charged-particle veto (CPV) detector of the ALICE experiment is a multi-wire proportional chamber with pad readout. It is designed to improve photon identification in the photon spectrometer PHOS. One module of the CPV detector was put in operation in LHC Run2...
Brief overview on microstructure gaseous detectors (MSGD) used in high-energy physics and description of technological steps for producing gas electron multiplier (GEM) made of polycrystalline CVD diamond are presented. GEM is widely used in modern gas detectors of ionizing radiation in experiments on high-energy physics at accelerators and in other fields of science. The test results of the...
Precision measurements of beta-spectra have always been and are still playing an
important role in several fundamental physical problems, predominantly in
neutrino physics.
Magnetic and electrostatic spectrometers possess the superior energy resolution,
but at the same time such devices appear to be very complex and large-scale
setups.
Since the electron free path at $3$~MeV (which...
for the CBM Collaboration — Physikalisches Institut, Eberhard Karls Universität Tübingen
The CBM experiment at FAIR is being designed for the study of the QCD phase diagram in the region of the high baryon chemical potential at relatively moderate temperatures. The Silicon Tracking System (STS) is the central detector for momentum reconstruction of the produced charged particles in the CBM...
