BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Data Collecting and Treatment Control System in the «Alpha-Electr on» Space Experiment onboard the International Space Station DTSTART;VALUE=DATE-TIME:20161011T120000Z DTEND;VALUE=DATE-TIME:20161011T121500Z DTSTAMP;VALUE=DATE-TIME:20260814T160401Z UID:indico-contribution-97-801@cern.ch DESCRIPTION:Speakers: Peter Naumov (NRNU MEPhI)\nThe fast multilayer scint illation detector of the new telescope-spectrometer for the ALFA-ELECTRON space experiment is in ground testing mode now. A module data control sys tem for spectrometer is discussed. An algorithm for data treatment is pres ented. The device will planned to install on the outer surface of the Russ ian Segment of the International Space Station in 2018.\n\nhttps://indico. particle.mephi.ru/event/4/contributions/801/ LOCATION:Milan Hotel Vivaldi-Boccerini URL:https://indico.particle.mephi.ru/event/4/contributions/801/ END:VEVENT BEGIN:VEVENT SUMMARY:Sharp increasing of positron to electron fluxes ratio below 2 GV measured by PAMELA DTSTART;VALUE=DATE-TIME:20161011T103000Z DTEND;VALUE=DATE-TIME:20161011T104500Z DTSTAMP;VALUE=DATE-TIME:20260814T160401Z UID:indico-contribution-97-743@cern.ch DESCRIPTION:Speakers: Vladimir Mikhailov (NRNU MEPHI)\nMagnetic spectromet er PAMELA was launched onboard a satellite Resurs-DK1\ninto low-Earth pola r orbit with altitude 350-600 km to the study cosmic ray antiparticle flux es in a wide energy range from ~ 100 MeV to hundreds GeV. This paper prese nts the results of observations of temporal variations of the positron and electron fluxes in the 2006-2015. The ratio of the positron and electro n fluxes below 2 GV shows sharp increasing since 2014 due to changing of the polarity of the solar magnetic field.\n\nhttps://indico.particle.mep hi.ru/event/4/contributions/743/ LOCATION:Milan Hotel Vivaldi-Boccerini URL:https://indico.particle.mephi.ru/event/4/contributions/743/ END:VEVENT BEGIN:VEVENT SUMMARY:Electron plus positron spectrum in the energy range 50 – 1500 Ge V from the PAMELA data. DTSTART;VALUE=DATE-TIME:20161011T104500Z DTEND;VALUE=DATE-TIME:20161011T110000Z DTSTAMP;VALUE=DATE-TIME:20260814T160401Z UID:indico-contribution-97-742@cern.ch DESCRIPTION:Speakers: Alexander Kvashnin (LPI)\nInternational space experi ment PAMELA was started in 2006 and finished its work in 2016. The main ai ms of the experiment were the study of the spectra of cosmic rays and of t heir elemental composition\, including the spectra of antiprotons and posi trons in a wide energy range. \n The objective of this work is to develop a methodology for the selection of electrons (including positrons) with en ergies above 50 GeV and to obtain the summary spectrum of electrons and po sitrons in a wide energy range 50 – 1200 GeV. In our analyses we have u sed the data from three detectors - magnetic spectrometer\, the calorimete r and neutron detector. \n We developed the simple method for separation o f electrons and positrons from the total flux of charged particles enterin g the aperture of the spectrometer\, and the determination of the energy o f these particles. We have got the spectrum of electrons and positrons in the energy range of 50 to 1200 GeV. The geometrical factor of the magnetic spectrometer\, the calorimeter and neutron detector is 21 cm2•ster.\n T o extend energy range and increase the statistics at high energies\, we de veloped a methodology of the selection of electrons according only of the calorimeter and neutron detector (in this case the geometric factor is inc reased more than 20 times). The events when the axis of the cascade passes through the top and bottom planes of the calorimeter were chosen. The pre liminary results for this case are presented.\n\nhttps://indico.particle.m ephi.ru/event/4/contributions/742/ LOCATION:Milan Hotel Vivaldi-Boccerini URL:https://indico.particle.mephi.ru/event/4/contributions/742/ END:VEVENT BEGIN:VEVENT SUMMARY:Time variations of the proton flux in Earth inner radiation belt d uring 23/24 solar cycles based on the PAMELA and the ARINA data. DTSTART;VALUE=DATE-TIME:20161011T114500Z DTEND;VALUE=DATE-TIME:20161011T120000Z DTSTAMP;VALUE=DATE-TIME:20260814T160401Z UID:indico-contribution-97-703@cern.ch DESCRIPTION:Speakers: Vitaly Malakhov (NRNU MEPhI)\nThe PAMELA and the ARI NA experiments are carried out on the board of satellite RESURS-DK1 since 2006. The main goal of the PAMELA instrument is measurements of high energ y antiparticles in cosmic rays while the ARINA instrument is intended stud ying high energy charged particle bursts in the magnetosphere. Both of the se experiments have a possibility to study trapped particles in the inner radiation belt. The complex of these two instruments covers proton energy range from 30 MeV up to trapping limit (E= ∼2 GeV). Continuous measureme nts with the PAMELA and the ARINA spectrometers include falling and rising phases of 23/24 solar cycles and the maximum of 24th one. In this report we present temporal profiles of proton flux in the inner zone of the radia tion belt (1.11 \n\nhttps://indico.particle.mephi.ru/event/4/contributions /703/ LOCATION:Milan Hotel Vivaldi-Boccerini URL:https://indico.particle.mephi.ru/event/4/contributions/703/ END:VEVENT BEGIN:VEVENT SUMMARY:Selection of low-energy antiprotons stopped in coordinate-sensitiv e calorimeter of PAMELA spectrometer DTSTART;VALUE=DATE-TIME:20161011T110000Z DTEND;VALUE=DATE-TIME:20161011T111500Z DTSTAMP;VALUE=DATE-TIME:20260814T160401Z UID:indico-contribution-97-607@cern.ch DESCRIPTION:Speakers: Svetlana Rodenko (National Research Nuclear Universi ty MEPhI)\nExperimental measurements of the antiproton flux in the near Ea rth space are important for astrophysics\, including the exploration of th e hypothetical "dark" matter particle properties. From June 2006 up to Jan uary 2016\, the scientific experiment PAMELA on board the spacecraft Resur s-DK1 was carrying out the study the various cosmic rays components in the wide energy range. PAMELA spectrometer allows registering low-energy anti protons (E \n\nhttps://indico.particle.mephi.ru/event/4/contributions/607/ LOCATION:Milan Hotel Vivaldi-Boccerini URL:https://indico.particle.mephi.ru/event/4/contributions/607/ END:VEVENT BEGIN:VEVENT SUMMARY:Identification of low-energy antiprotons on pi-meson background us ing machine learning methods in PAMELA experiment DTSTART;VALUE=DATE-TIME:20161011T111500Z DTEND;VALUE=DATE-TIME:20161011T113000Z DTSTAMP;VALUE=DATE-TIME:20260814T160401Z UID:indico-contribution-97-598@cern.ch DESCRIPTION:Speakers: Anton Lukyanov (PhD student)\nOne of main tasks in P AMELA experiment is identification of cosmic ray (CR) antiprotons on diffe rent\nkinds of background. One example of such background at low energies are pi-meson particles which are\ngenerated in elements of spectrometer co nstruction by high-energy CR protons. We propose an approach\nbased on mac hine learning methods\, in particular\, Support Vector Machines (SVM). We use two\ndifferent sets of features for classification: track system featu res (12 measurements of ionization\nenergy losses along particle track) an d calorimeter features (different combinations of energy\nrelease inside c alorimeter along reconstructed particle trajectory).\n\nConstructed classi fier showed classification accuracy of 96% for antiprotons and 89% for pi- mesons\nwhen rigidity $R$ is up to 2 GeV. When $R \\in (2\, 5]$ classifica tion accuracy for pi-mesons is 15%.\nFor evaluation of classification accu racy we used k-fold cross-validation method with $k=5$.\n\nhttps://indico. particle.mephi.ru/event/4/contributions/598/ LOCATION:Milan Hotel Vivaldi-Boccerini URL:https://indico.particle.mephi.ru/event/4/contributions/598/ END:VEVENT BEGIN:VEVENT SUMMARY:Hard spectra of extreme Ground Level Enhancements DTSTART;VALUE=DATE-TIME:20161011T101500Z DTEND;VALUE=DATE-TIME:20161011T103000Z DTSTAMP;VALUE=DATE-TIME:20260814T160401Z UID:indico-contribution-97-586@cern.ch DESCRIPTION:Speakers: Ilya Usoskin (University of Oulu)\nGround Level Enha ncement (GLE) is a significant increase of the count rate registered on gr ound-based neutron monitors (NMs). So far\, 72 GLEs have been recorded by the worldwide neutron monitor network since the 1950s. The energy spectrum of solar energetic particles (SEP) for these events varied quite a lot be tween the events\, as measured directly and indirectly. Here we studied a statistical relation between the event-integrated intensity of a GLE (expr essed in percent-hours) and the 'hardness' of the solar particle energy sp ectra\, quantified as the ratio of the the integral omnidirectional event- integrated fluences of particles with energy above 30 MeV ($F_{30}$) and a bove 200 MeV ($F_{200}$). We specifically analyzed the event-integrated en ergy spectrum for the GLE 71 (17-May-2012)\, the only directly measured by PAMELA over the entire span. We found no clear relation between the inten sity and the spectral hardness for weak and moderate GLE events\, but all extreme GLE events were characterized by a very hard spectrum. This implie s that a hard spectrum can be securely assumed for all extreme GLE events\ , e.g.\, those studied using cosmogenic isotope data in the past.\n\nhttps ://indico.particle.mephi.ru/event/4/contributions/586/ LOCATION:Milan Hotel Vivaldi-Boccerini URL:https://indico.particle.mephi.ru/event/4/contributions/586/ END:VEVENT BEGIN:VEVENT SUMMARY:Comparison of hadron shower data in the PAMELA experiment with Gea nt 4 simulations DTSTART;VALUE=DATE-TIME:20161011T113000Z DTEND;VALUE=DATE-TIME:20161011T114500Z DTSTAMP;VALUE=DATE-TIME:20260814T160401Z UID:indico-contribution-97-572@cern.ch DESCRIPTION:Speakers: Vladislav Alekseev (P. G. Demidov Yaroslavl State Un iversity)\nThe sampling imaging electromagnetic calorimeter of $\\approx 1 6.3$ radiation lengths and $\\approx 0.6$ nuclear interaction length desig ned and constructed by the PAMELA collaboration as a part of the large mag netic spectrometer PAMELA. Calorimeter consists of 44 single-sided silicon sensor planes interleaved with 22 plates of tungsten absorber (thickness of each tungsten layer 0.26 cm). Silicon planes are composed of a $3\\time s3$ matrix of silicon detectors\, each segmented into 32 read-out strips w ith a pitch of 2.4 mm. The orientation of the strips of two consecutive la yers is orthogonal and therefore provides two-dimensional spatial informat ion. Due to the high granularity\, the development of hadronic showers can be study with a good precision.\n\nIn this work a Monte Carlo simulations (based on Geant4) performed using different available models\, and includ ing detector and physics effects\, compared with the experimental data obt ained on the near Earth orbit. The response of the PAMELA calorimeter to h adronic showers investigated including shower radius\, longitudinal and tr ansverse shower profiles etc.\n\nhttps://indico.particle.mephi.ru/event/4/ contributions/572/ LOCATION:Milan Hotel Vivaldi-Boccerini URL:https://indico.particle.mephi.ru/event/4/contributions/572/ END:VEVENT END:VCALENDAR