In-flight second order correction of PAMELA calorimeter characteristics (for simulation in Geant4)

International Conference on Particle Physics and Astrophysics

物理学;天文学

Dunaeva, O.A.^1 ; Alekseev, V.V.^1 ; Bogomolov, Yu. V.^1 ; Lukyanov, A.D.^1 ; Malakhov, V.V.^2 ; Mayorov, A.G.^1,2 ; Rodenko, S.A.^2

Yaroslavl State P. G. Demidov University, 150000 Sovietskaya st. 14, Yaroslavl, Russia^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe highway 31, Moscow

115409, Russia^2

关键词: Correction factors;    Electromagnetic process;    Ground based tests;    High-precision;    Scientific equipment;    Second-order correction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012024/pdf
DOI  :  10.1088/1742-6596/798/1/012024

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Simulation of the PAMELA spectrometer characteristics is performed with the special program accepted by the PAMELA collaboration based on Geant4 package, which needs a detailed information about geometry, materials etc. of scientific equipment. This data is taken from manufactures or obtained from different ground-based tests including accelerators. We propose a method of in-flight verification of calorimeter characteristics. To calculate them we select relativistic protons passing through all the spectrometer without interactions. We obtain correction values from a comparison of experimental data and simulation in assumption that electromagnetic processes are performed in Geant4 with high precision. As a result, characteristics of silicon detectors (the sensitive part) are verified. Correction factor is 2.0 ± 0.3% with respect to original value.