标题： POLAR：用于瞬变源的星载X射线偏振计 显示英文标题

标题： POLAR: A Space-borne X-Ray Polarimeter for Transient Sources

摘要： POLAR是一种新型紧凑型康普顿X射线偏振计，旨在测量伽马射线暴（GRB）的瞬时辐射以及软伽马重复暴和太阳耀斑等其他强暂现源在50-500 keV能量范围内的线性偏振。 对天体物理源的偏振进行详细测量将有助于更好地理解源的几何结构和发射机制。 由于其大的调制因子、有效面积和视场，POLAR预计每年能观测到几个GRB，其最小可探测偏振小于10%。 POLAR由1600个低Z塑料闪烁体条组成，分为25个独立的模块单元，每个单元由一个平板多阳极光电倍增管读出。 本文回顾了POLAR的设计，并介绍了使用同步辐射对POLAR工程和鉴定模型（EQM）的一个模块单元进行测试的结果。 在完成整个EQM的建造和测试后，我们将于2011年开始建造飞行模型，以期在2013年发射。 显示英文摘要

摘要： POLAR is a novel compact Compton X-ray polarimeter designed to measure the linear polarization of the prompt emission of Gamma Ray Bursts (GRB) and other strong transient sources such as soft gamma repeaters and solar flares in the energy range 50-500 keV. A detailed measurement of the polarization from astrophysical sources will lead to a better understanding of the source geometry and emission mechanisms. POLAR is expected to observe every year several GRBs with a minimum detectable polarization smaller than 10%, thanks to its large modulation factor, effective area, and field of view. POLAR consists of 1600 low-Z plastic scintillator bars, divided in 25 independent modular units, each read out by one flat-panel multi-anode photomultiplier. The design of POLAR is reviewed, and results of tests of one modular unit of the engineering and qualification model (EQM) of POLAR with synchrotron radiation are presented. After construction and testing of the full EQM, we will start building the flight model in 2011, in view of the launch foreseen in 2013.