ISS-CREAM量热计在校准束试验中的性能
Performance of the ISS-CREAM calorimeter in a calibration beam test
摘要：
国际空间站的宇宙射线能量学和质量实验（ISS-CREAM）安装在国际空间站上，以测量电荷范围为$\rm Z=1$至26的高能宇宙射线元素光谱。ISS-CREAM仪器包括一个钨纤维热量计，前面有一个碳靶用于能量测量。碳靶诱导强子相互作用，在量热计中产生次级粒子簇射。量热计中的能量沉积与粒子能量成正比。作为国际空间站CREAM的前身，球载CREAM仪器在南极上空成功飞行了7次，累积暴露时间为191天。CREAM量热计展示了其测量宇宙射线粒子能量的能力，ISS-CREAM量热计预计将具有类似的性能。在发射之前，一个工程单位的量热计被运到欧洲核子研究中心进行校准和性能测试。该束测试包括电子和π介子束的位置、能量和角度扫描以及用于校准和表征的高压扫描。此外，还研究了增透纤维中的衰减效应。在本文中，光束测试结果，包括衰减效应的校正，提出。
英文摘要：
The Cosmic Ray Energetics And Mass experiment for the International Space Station (ISS-CREAM) was installed on the ISS to measure high-energy cosmic-ray elemental spectra for the charge range $\rm Z=1$ to 26. The ISS-CREAM instrument includes a tungsten scintillating-fiber calorimeter preceded by a carbon target for energy measurements. The carbon target induces hadronic interactions, and showers of secondary particles develop in the calorimeter. The energy deposition in the calorimeter is proportional to the particle energy. As a predecessor to ISS-CREAM, the balloon-borne CREAM instrument was successfully flown seven times over Antarctica for a cumulative exposure of 191 days. The CREAM calorimeter demonstrated its capability to measure energies of cosmic-ray particles, and the ISS-CREAM calorimeter is expected to have a similar performance. Before the launch, an engineering-unit calorimeter was shipped to CERN for calibration and performance tests. This beam test included position, energy, and angle scans of electron and pion beams together with a high-voltage scan for calibration and characterization. Additionally, an attenuation effect in the scintillating fibers was studied. In this paper, beam test results, including corrections for the attenuation effect, are presented.
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