5:15 PM - 6:45 PM
[PCG20-P11] Development status of the geostationary orbit high energy proton flux measurement instrument (RMS-p) III
Keywords:space weather, high energy proton, silicon semiconductor detector, Cherenkov photodetector
National Institute of Information and Communications Technology is developing a space environment measurement instrument (RMS: Radiation Monitors for Space weather) that will be mounted on the next generation meteorological observation satellite, based on the research project "Research and Development of observing technology on Himawari satellite" commissioned by the Ministry of Internal Affairs and Communications. The energy range covered by the proton flux measurement instrument (RMS-p) ranges from 10 MeV to over 1 GeV. RMS-p is equipped with both low-energy (RMS-p-lo) and high-energy (RMS-p-hi) instruments to achieve a wide dynamic range.
The energy range of protons measured by RMS-p-lo is from 10 to about 500 MeV, and the energy of incident protons is measured by stacking of eight silicon semiconductor detectors (SSDs). In November 2023, to evaluate the measurement performance of RMS-p-lo, a proton beam irradiation test (irradiation energy: 20 MeV to 160 MeV) was carried out at HIMAC of the National Institute of Radiological Science and Technology. By combining with the results of Geant4 simulation, the responsibility for protons with energy of 20 MeV to 160 MeV was confirmed.
On the high-energy side, RMS-p-hi combines a single silicon semiconductor detector with a Cherenkov light radiator for energy measurement. In February 2024, the RMS-p was installed at the J-PARC Center of the Japan Atomic Energy Agency, and a proton beam irradiation test from 400 MeV to 3 GeV was conducted. As a result, it was confirmed that the proton beam energy can be measured by RMS-p-hi in the case where the energy of the irradiated proton is 500 MeV or more. The response of the RMS-p-lo to protons with energies of 400 MeV to 500 MeV was also confirmed. The performance evaluation based on the irradiation test results of the RMS-p is reported.
The energy range of protons measured by RMS-p-lo is from 10 to about 500 MeV, and the energy of incident protons is measured by stacking of eight silicon semiconductor detectors (SSDs). In November 2023, to evaluate the measurement performance of RMS-p-lo, a proton beam irradiation test (irradiation energy: 20 MeV to 160 MeV) was carried out at HIMAC of the National Institute of Radiological Science and Technology. By combining with the results of Geant4 simulation, the responsibility for protons with energy of 20 MeV to 160 MeV was confirmed.
On the high-energy side, RMS-p-hi combines a single silicon semiconductor detector with a Cherenkov light radiator for energy measurement. In February 2024, the RMS-p was installed at the J-PARC Center of the Japan Atomic Energy Agency, and a proton beam irradiation test from 400 MeV to 3 GeV was conducted. As a result, it was confirmed that the proton beam energy can be measured by RMS-p-hi in the case where the energy of the irradiated proton is 500 MeV or more. The response of the RMS-p-lo to protons with energies of 400 MeV to 500 MeV was also confirmed. The performance evaluation based on the irradiation test results of the RMS-p is reported.