Performance of the HEPD-02 LYSO calorimeter and expected sensitivity to GRBs detection

Discussion timeslot (ZOOM-Meeting): 20. July 2021 - 18:00
ZOOM-Meeting URL: https://desy.zoom.us/j/91999581729
ZOOM-Meeting ID: 91999581729
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session: https://icrc2021-venue.desy.de/channel/43-New-and-Upcoming-Instruments-for-Space-Based-Gamma-Ray-Astronomy-GAD/87
Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-05/6

Abstract:
'A High-Energy Particle Detector will be launched on board the CSES-02 satellite with the main purpose of deepening our comprehension of the Earth magnetosphere, investigating the Inner Van Allen belts and contributing to the understanding of sub-GeV cosmic rays.rnHEPD-02 is composed of two segmented scintillator layers for the trigger, a silicon pixel tracker and a calorimeter. The detector is surrounded by a plastic scintillator veto, except for the front side. rnThe calorimeter is composed of twelve layers of $1.1times15times15,text{cm}^3$ plastic scintillator pads and two layers of 3 LYSO bars, as large as $2.5times4.9times15,text{cm}^3$, disposed orthogonally to each other. rnThanks to its features, HEPD-02 could identify gamma-rays converting in the LYSO crystals by requiring all the other sub-detectors to act as a veto. rnIn particular, Gamma Ray Bursts (GRBs) are extremely energetic events generated billions of light years away from the Earth, possibly during neutron star mergers or supernova explosions. HEPD-02 would join the fleet of space detectors continuously monitoring the sky and searching for GRBs, widening the sky coverage and contributing to the knowledge of these phenomena. rnWe report the measured radioactive background of a HEPD LYSO crystal due to the decay of $^{176}text{Lu},(2.6%text{ ab.},,T_½ = 3.78times10^{10},text{y})$, then describing a possible triggering scheme for GRBs and the expected sensitivity to GRBs in the $2-20,text{MeV}$ energy window.'

Authors: Valentina Scotti | Roberto Iuppa | Stefania Perciballi | Giuseppe Osteria | Francesco Nozzoli | Marco Mese
Collaboration: CSES-Limadou

Indico-ID: 661
Proceeding URL: https://pos.sissa.it/395/583