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Information × Registration Number 0304U004103, 0103U004213 , R & D reports Title Trigger magnetospheric phenomenon investigation and non-traditional methods of ultrahigh energies cosmic radiation registration popup.stage_title Фізичні та спектрометричні характеристики супутникового спектрометра-телескопа енергійних заряджених частинок "СТЕП-Ф" Head Shmatko E.S., Registration Date 20-03-2004 Organization Kharkov National University named after V.N.Karazin popup.description2 The satellite spectrometer-telescope of high-energy charged particles STEP-F of the scientific space experiment "CORONAS-PHOTON" is the object of investigation. The purpose of the work is the computer simulation of processes of high-energy particles passing through detectors of the STEP-F device, testing and definition of spectrometric characteristics of silicon position-sensitive and scintillation detectors of charged particles, manufacturing and readjustments of preliminary charge-sensitive and forming amplifiers of analog signals from detectors of a telescopic system. The investigation method is the Monte-Carlo simulation with using the GEANT4 toolkit, testing with the help of the laboratory equipment, radioactive sources as well as the cyclotron accelerator of high-energy protons, alpha-particles and ions. The absorbed energies, stopping ranges, the dynamic range of signal amplitudes and energies of primary particles that will be registered by the STEP-F device are defined by means of computersimulation. The made silicon matrixes provide definition of a particle's coming direction and kind (identification of electrons, protons and alpha-particles). The obtained leakage current levels of each element are 10-25 nA, noise levels are 4-6 keV, and the energy resolution for alpha-particles is 7-12 keV. The long-term instability has been reduced (according to the noise level 35%) by means of series of applied technique. In addition, the long-term instability is absent in vacuum. Scintillation detectors are designed and made; their spectrometric characteristics are measured. It was found out, that energy resolution equals from 12 % (for energy 511 keV) up to 8 % (for energy 1332 keV) that meets the requirements for large-area detectors. Thickness of detectors and passive layers in a design of a telescopic system of the detecting head are improved with using the cyclotron accelerator of high-energy protons and ions at the Institute of Physical and Chemical Research (RIKEN), Tokyo, Japan. The energy rangesof electrons, protons and alpha-particles, which will be registered by the STEP-F device during realization of the "Coronas-Photon" project, are defined. Signals from the neighboring elements of the same silicon position-sensitive matrix are not subjected to cross-coupling during the registration of high-energy particles, as defined experimentally as well as by means of the GEANT4 simulation. The quantity of the secondary particles generated during the primary high-energy ions passing through the STEP-F device is insignificant, and will not essential influence to pulse amplitude from the primary particle. Product Description popup.authors popup.nrat_date 2020-04-02 Close