Speaker
Mr.
Yury Trofimov
(National Research Nuclear University MEPHI)
Description
GRIS (Gamma and Roentgen radiation of the Sun) is a prospective hard X-ray and gamma-ray spectrometer of solar flares with the energy range from 50 keV to 200 MeV. It is also designed for registration of high energy neutron fluxes (>30 MeV). The apparatus will be mounted on an oriented platform outside the Russian Orbital Segment of the International Space Station. The instrument includes two detector heads: a low energy spectrometer (LES) based on a fast scintillator with relatively high energy resolution 3.5–4.5% at 662 keV (LaBr3(Ce) or CeBr3) and size of ø7.62×7.62 cm, and a high energy spectrometer (HES) based on ø12×15 cm CsI(Tl) scintillator. Thanks to n/γ discrimination capability of CsI(Tl) crystals, the HES spectrometer is also intended for neutron registration.
To estimate GRIS instrument registration capabilities, simulation of the HES neutron and gamma registration channels response to background radiation and to solar flares of different magnitude and spectral compositions was performed. Expected spectral and n/γ discrimination performances based on measurements with detectors prototypes are represented.
Primary author
Mr.
Yury Trofimov
(National Research Nuclear University MEPHI)
Co-authors
Dr.
Alexander Glyanenko
(National Nuclear Research University “MEPHI”)
Mr.
Evgeny Lupar
(National Research Nuclear University MEPhI)
Rodion Faradzhaev
(National Research Nuclear University MEPhI)
Dr.
Vitaly Yurov
(National Research Nuclear University MEPHI)
Dr.
Yury Kotov
(National Research Nuclear University MEPHI)
