Investigation of electron belts in the Earth’s magnetosphere with the help of X-ray spectrophotometer SphinX and satellite telescope of electrons and protons STEP-F: preliminary results

1Dudnik, OV, 2Podgorski, P, 2Sylwester, J, 2Gburek, S, 2Kowaliński, M, 2Siarkowski, M, 2Plocieniak, S, 2Bakala, J
1Institute of Radio Astronomy of National Academy of Sciences of Ukraine, Kharkiv, V.N. Karazin National University of Kharkiv, Kharkiv, Ukraine
2Space Research Centre of Polish Academy of Sciences, Wroclaw, Poland
Kosm. nauka tehnol. 2011, 17 ;(4):14-25
Publication Language: Russian
High-energy particles abundant in the Earth’s magnetosphere contribute to signals measured by instruments aboard the CORONAS-PHOTON satellite placed in low polar orbit. Among the instruments in the science payload was the Solar Photometer in X-rays (SphinX). Within this instrument, a particle signal originates due to penetration of high-energy electrons and secondary gamma quanta into the detectors. These particle signals need to be absolutely calibrated in detail to perform their analysis. For this, some measurements of the specially elaborated particle spectrometer STEP-F were used.
        The STEP-F instrument was located in close proximity to the SphinX instrument and its field of view was directed perpendicularly to the SphinX field of view. It is shown that the SphinX and STEP-F detectors provide nearly identical signal profiles during crossing the Brazilian Magnetic Anomaly and substantial correspondence when crossing the Earth's radiation belts. Extended understanding of the correspondence between SphinX and STEP-F are necessary taking into account the secondary gamma ray emission arising from the construction materials of the detector head, the TESIS Observatory and the spacecraft itself. The dynamics of signals caused by high-energy electrons measured by SphinX during a weak geomagnetic storm is found to reflect the processes of radial and pitch-angle diffusion of electrons.
Keywords: detectors, gamma quanta, spectrophotometer
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