Feasibility study of cosmic-ray componentsmeasurement by using a scintillating fiber tracker in space  

作　　者：Jun-jing Wang Xin Wu Ming Xu Chiara Perrina Philipp Azzarello Franck Cadoux Yannick Favre Daniel La Marra Bo-bing Wu 

机构地区：[1]Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]Department of Nuclear and Particle Physics,University of Geneva,1211 Geneva 4,Switzerland [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Institute of Physics,École Polytechnique Fédérale de Lausanne(EPFL),1015,Lausanne,Switzerland

出　　处：《Radiation Detection Technology and Methods》2021年第3期389-403,共15页辐射探测技术与方法（英文）

基　　金：The authors gratefully acknowledge the financial support from the Swiss Space Office of the State Secretariat for Educa-tion,Research and Innovation(ESA PRODEX Programme);the Swiss National Science Foundation(SNSF);the Sino-Swiss grant SSSTC EG 21-12201;the International Partnership Program of Chinese Academy of Sciences,grant No.113111KYSB20190020;the National Natural Science Foundation of China,grant No.12027803,U1731239;Key Research Program of Frontier Sciences,CAS,grant No.QYZDY-SSW-SLH008;Youth Innovation Promotion Association,CAS.

摘　　要：Purpose The application of traditional silicon strip detectors in space experiments often suffers from heat and power consumption limitations when a large area has to be instrumented.Recently,a scintillating fiber detector with SiPM readout was proposed and adopted by ground high-energy experiments.Its excellent performance in track measurement and mechanical flexibility makes it a prospective candidate for large-area tracking detectors in the next-generation space experiments.This paper mainly focuses on its performance in cosmic-ray charge measurement.Methods A fast Geant4 simulation for a single tracker module was developed and compared with the beam test results.The non-uniformity of the detector response was studied.Moreover,a full tracker simulation using a variety of typical cosmic ray nuclei was implemented.The performance of a fiber tracker with multiple layers was evaluated.Results and conclusion The comparison between the simulation results and the beam test data of protons and helium nuclei shows a good agreement.The non-uniformity study reveals the strong dependence of the detector signal on the position and inclination angle of the incident particles.Then,a corresponding correction algorithm was developed and applied in the following data analysis.The preliminary result shows that the charge measurement capability of the fiber tracker composed of 9 XY superlayers is comparable to that of the AMS-02 inner tracker,which consists of 7 layers of double-sided silicon micro-strip ladders.This paper discusses the feasibility of using fiber trackers to measure cosmic ray charges and provide a guide for the optimization of detector design.

关 键 词：Fiber tracker SIPM Charge measurement COSMIC-RAY SIMULATION 

分 类 号：O57[理学—粒子物理与原子核物理]