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arXiv 0903.1987astro-ph.IMastro-ph.EP
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利用星载和机载实验寻找Cosmic-Ray反粒子

Search for Cosmic-Ray Antiparticles with Balloon-borne and Space-borne Experiments

Ph. von Doetinchem

摘要:

本论文讨论了两种不同的测量宇宙线反粒子在GeV到TeV能量范围内的方法。本论文的第一部分讨论了利用PEBS探测器测量反粒子通量的前景。该项目在地球的一个极点,海拔40公里处进行长时间的气球飞行。进行了GEANT 4模拟,确定了大气背景和衰减,特别是反粒子的衰减。第二部分涉及AMS-02实验,该实验将于2010年安装在高度约400公里的国际空间站上,为期约三年,在不受地球大气影响的情况下测量宇宙射线。本文主要研究反符合计数器系统(ACC)。ACC需要在高通量期间降低触发率,并拒绝从侧面穿过跟踪器的外部粒子或由检测器内的相互作用产生的粒子,否则这些粒子会干扰干净的电荷和动量测量。最后一点对于反核和反粒子的测量特别重要。

英文摘要:

This thesis discusses two different approaches for the measurement of cosmic-ray antiparticles in the GeV to TeV energy range. The first part of this thesis discusses the prospects of antiparticle flux measurements with the proposed PEBS detector. The project allots long duration balloon flights at one of Earth's poles at an altitude of 40 km. GEANT4 simulations were carried out which determine the atmospheric background and attenuation especially for antiparticles. The second part covers the AMS-02 experiment which will be installed in 2010 on the International Space Station at an altitude of about 400 km for about three years to measure cosmic rays without the influence of Earth's atmosphere. The present work focuses on the anticoincidence counter system (ACC). The ACC is needed to reduce the trigger rate during periods of high fluxes and to reject external particles crossing the tracker from the side or particles resulting from interactions within the detector which would otherwise disturb the clean charge and momentum measurements. The last point is especially important for the measurement of antinuclei and antiparticles.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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