PAMELA航天任务的初步结果
First Results from the PAMELA Space Mission
摘要：
2006年6月15日，PAMELA卫星实验从拜科努尔航天器发射场发射，自2006年7月以来一直在收集数据。该装置包括飞行时间系统、硅-微带磁谱仪、硅-钨电磁量能器、反符合系统、簇尾计数闪烁器和中子探测器。这些设备的组合允许在宽能量范围（100 MeV - 100 GeV）内进行带电宇宙辐射的精确研究。主要的科学目标是测量反质子和正电子能谱，以便寻找奇异源，如暗物质粒子湮灭。PAMELA还在寻找原始反核（反氦），并通过精确测量反粒子能谱和精确研究轻核及其同位素来测试宇宙射线传播模型。我们回顾了该仪器的现状，并提出了关于反粒子测量和暗物质间接搜索的初步结果。
英文摘要：
On the 15th of June 2006, the PAMELA satellite-borne experiment was launched from the Baikonur cosmodrome and it has been collecting data since July 2006. The apparatus comprises a time-of-flight system, a silicon-microstrip magnetic spectrometer, a silicon-tungsten electromagnetic calorimeter, an anticoincidence system, a shower tail counter scintillator and a neutron detector. The combination of these devices allows precision studies of the charged cosmic radiation to be conducted over a wide energy range (100 MeV - 100's GeV) with high statistics. The primary scientific goal is the measurement of the antiproton and positron energy spectrum in order to search for exotic sources, such as dark matter particle annihilations. PAMELA is also searching for primordial antinuclei (anti-helium), and testing cosmic-ray propagation models through precise measurements of the antiparticle energy spectrum and precision studies of light nuclei and their isotopes. We review the status of the apparatus and present preliminary results concerning antiparticle measurements and dark-matter indirect searches.
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