| Autor: |
Park, I.1 park_inchun@isee.nagoya-u.ac.jp, Miyoshi, Y.1, Mitani, T.2, Hori, T.1, Takashima, T.2, Kurita, S.3, Shinohara, I.2, Kasahara, S.4, Yokota, S.5, Keika, K.4, Claudepierre, S. G.6,7, Looper, M. D.6 |
| Předmět: |
|
| Zdroj: |
Journal of Geophysical Research. Space Physics. Jul2021, Vol. 126 Issue 7, p1-13. 13p. |
| Abstrakt: |
This study investigates the characterization and calibration of the high‐energy electron experiments (HEP) instrument onboard the exploration of energization and radiation in geospace (ERG). Two detector modules, HEP‐L and HEP‐H, which employ stacks of multichannel silicon strip detectors, detect electrons in the energy ranges of 70 keV–1 MeV and 700 keV–2 MeV, respectively. The detector response to electron irradiation needs to be assessed to obtain accurate electron fluxes from these detectors. In this study, we perform Monte Carlo simulations using the Geant4 particle simulation tool to reconstruct incident electron fluxes from detected count rates. Based on the simulation results, we investigate the response characteristics of the detectors when electrons with a certain range of energy are irradiated onto them. A response function is constructed by combining the simulation results for different incident energies. A response matrix is calculated by binning the response function according to the energy channels of the detector, and an inverse matrix derived from the response matrix is used to calibrate the observational data. Compared with the data obtained from another electron instrument onboard the Arase satellite (MEP‐e), whose energy range overlaps with that of the HEP, the differential flux data for the overlapping energy range (85–95 keV) are consistent with each other. The basic characteristics of the HEP detectors are thus confirmed to provide well‐calibrated data. Key Points: Arase high‐energy electron instrument (HEP) observational data (70 keV–2 MeV) is calibrated using a Geant4 simulationA new "inverse matrix calibration" method is developed for this calibrationThe calibrated HEP data shows good agreement with the data from MEP‐e that is a lower energy electron instrument onboard Arase satellite [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
| Externí odkaz: |
|
Plný text