The AMS silicon tracker: Construction and performance
The AMS silicon tracker: Construction and performance
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DOI：
10.1016/j.nima.2008.07.116
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发表时间：
2008-10
影响因子：
1.4
通讯作者：
P. Zuccon
中科院分区：
文献类型：
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作者：
P. Zuccon
AMS-02装置的核心部分由8层双面硅微带传感器组成，置于0.8T磁场中。在每一层中，沿着粒子轨迹同时测量硅中的位置和能量损失。凭借其高空间分辨率，硅跟踪器将确定高达几个TV的粒子的刚度（R）和电荷符号，在R<100 GV时的相对分辨率为2.5%。硅读出电子器件的低噪声和宽动态范围允许利用能量损失测量来确定高达Fe的核的粒子绝对电荷。AMS跟踪器的建造已经完成，将在2007年期间纳入AMS实验。介绍了硅探测器在各种束流测试下的性能，重点是空间分辨率和电荷分离能力。
Eight layers of double sided silicon microstrip sensors immersed in a 0.8T magnetic field constitute the core of the AMS-02 apparatus. In each layer, simultaneous measurements of position and energy loss in silicon are performed along the particle trajectory. With its high spatial resolution, the silicon tracker will determine the rigidity (R) and the charge sign of particles up to several TVs, with a relative resolution 2.5% at R<100GV. The low noise and wide dynamic range of the silicon readout electronics allow to exploit the energy loss measurements to determine the particle absolute charge for nuclei up to Fe. The AMS tracker construction has been completed and it will be integrated into the AMS experiment during the 2007. The performances of the silicon detectors observed under various beam tests are presented focusing on the spatial resolution and on the charge separation capability.