Measurement of cosmic-ray charge with the DAMPE Silicon-Tungsten Tracker
Measurement of cosmic-ray charge with the DAMPE Silicon-Tungsten Tracker
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DOI：
10.22323/1.301.0240
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发表时间：
2017-08
期刊：
影响因子：
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通讯作者：
S. Vitillo;V. Gallo
中科院分区：
文献类型：
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作者：
S. Vitillo;V. Gallo
暗物质粒子探测器(DAMPE)卫星是2015年12月17日发射的一颗强大的空间探测器。这次飞行任务的主要目标是研究暗物质特征，这要归功于探测到能量范围从几个GeV到10TeV的电子和光子。此外，由于原子核流量测量高达100TeV，对宇宙射线的起源和传播机制的深入了解也是有望实现的。在这种情况下，电荷(Z)测量对于区分宇宙线的不同化学成分和检查星系中的传播模型至关重要。DAMPE探测器由以下子探测器组成：塑料条闪烁体探测器(PSD)、硅钨跟踪器(STK)、氧化铋(BGO)成像量热计和中子探测器(NUD)。Z测量由PSD和STK执行。在本文件中，在详细描述了STK之后，讨论了利用一年多的STK在轨数据识别绝对离子电荷的第一批结果，以及应用的校准程序。
The DArk Matter Particle Explorer (DAMPE) satellite is a powerful space detector launched on December 17 2015. The main objectives of the mission are in the research for Dark Matter signatures thanks to the detection of electrons and photons in an energy range going from few GeV up to 10 TeV. Moreover, insights on the origin and propagation mechanisms of cosmic rays are also expected thanks to nuclei flux measurements up to 100 TeV. In this context the charge (Z) measurement is crucial to distinguish the different chemical components of cosmic rays and to check the models of propagation in the galaxy. The DAMPE detector is composed of the following sub-detectors: a Plastic Strip scintillator Dectector (PSD), a Silicon-Tungsten tracKer (STK), a Bismuth Germanium Oxide (BGO) imaging calorimeter, and a NeUtron Detector (NUD). The Z-measurement is performed by the PSD and the STK. In this document after a detailed description of the STK, the first results on the absolute ion charge identification using more than one year of STK on-orbit data are discussed, together with the applied calibration procedure.