On-ground calibration of the X-ray, gamma-ray, and relativistic electron detector onboard TARANIS
arxiv(2024)
摘要
We developed the X-ray, Gamma-ray and Relativistic Electron detector (XGRE)
onboard the TARANIS satellite, to investigate high-energy phenomena associated
with lightning discharges such as terrestrial gamma-ray flashes and terrestrial
electron beams. XGRE consisted of three sensors. Each sensor has one layer of
LaBr_3 crystals for X-ray/gamma-ray detections, and two layers of plastic
scintillators for electron and charged-particle discrimination. Since 2018, the
flight model of XGRE was developed, and validation and calibration tests, such
as a thermal cycle test and a calibration test with the sensors onboard the
satellite were performed before the launch of TARANIS on 17 November 2020. The
energy range of the LaBr_3 crystals sensitive to X-rays and gamma rays was
determined to be 0.04-11.6 MeV, 0.08-11.0 MeV, and 0.08-11.3 MeV for XGRE1, 2,
and 3, respectively. The energy resolution at 0.662 MeV (full width at half
maximum) was to be 20.5
calibration test were then used to validate a simulation model of XGRE and
TARANIS. By performing Monte Carlo simulations with the verified model, we
calculated effective areas of XGRE to X-rays, gamma rays, electrons, and
detector responses to incident photons and electrons coming from various
elevation and azimuth angles.
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