Standard Radiation Environment Monitor (SREM) activities at PSI
Hajdas, W.¹; Eggel, C.¹; Mohammadzadeh, A.²; Nieminen, P.²; Daly, E.^2
1Paul Scherrer Institut; ²ESA-ESTEC

The Standard Radiation Environment Monitor (SREM) was developed and manufactured by Contraves Space AG in cooperation with the Paul Scherrer Institute and the European Space Agency. SREM measures high-energy electrons and protons in space with a certain spectral resolution and angular sensitivity. PSI has prepared and conducted extensive calibration campaigns of all SREM instruments using various sources of radiations like protons from the PIF facility and electrons and gamma-rays from radioactive sources. A detailed computer mass model of SREM was also developed and verified using calibration data, allowing for a reliable determination of the instrument response matrices. SREM calibration procedure as well as Monte Carlo modeling results will be presented. Usefulness of the calibration will be illustrated with an example of SREM applied for analysis of data from magnetar explosion.