High sensitivity balloon-borne hard X-ray/soft Gamma-Ray Polarimeter PoGOLite
High sensitivity balloon-borne hard X-ray/soft Gamma-Ray Polarimeter PoGOLite
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DOI：
10.1109/nssmic.2007.4436669
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发表时间：
2007-12
期刊：
影响因子：
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通讯作者：
T. Mizuno;M. Arimoto;M. Axelsson;C. Bjornsson;G. Bogaert;P. Carlson;William W. Craig;Y. Fukazawa;Shuichi Gunji;L. Hjalmarsdotter;T. Kamae;Y. Kanai;J. Kataoka;J. Katsuta;N. Kawai;M. Kiss;W. Klamra;Stefan Larsson;G. Madejski;C. Bettolo;Johnny S. T. Ng;M. Pearce;F. Ryde;H. Tajima;H. Takahash;T. Takahashi;T. Tanaka;T. Thurston;M. Ueno;G. Varner;H. Yoshida
中科院分区：
文献类型：
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作者：
T. Mizuno;M. Arimoto;M. Axelsson;C. Bjornsson;G. Bogaert;P. Carlson;William W. Craig;Y. Fukazawa;Shuichi Gunji;L. Hjalmarsdotter;T. Kamae;Y. Kanai;J. Kataoka;J. Katsuta;N. Kawai;M. Kiss;W. Klamra;Stefan Larsson;G. Madejski;C. Bettolo;Johnny S. T. Ng;M. Pearce;F. Ryde;H. Tajima;H. Takahash;T. Takahashi;T. Tanaka;T. Thurston;M. Ueno;G. Varner;H. Yoshida
偏振伽马射线观测器 - 轻型版本 (PoGOLite) 是一种新的气球实验，能够在 6 小时的单次飞行中首次检测 25-80 keV 能量范围内 200 mCrab 源的 10% 偏振。硬 X 射线和软伽马射线的偏振测量有望为高能发射机制和源几何结构提供有力的探测。 PoGOLite 使用康普顿散射和光吸收来测量由塑料和 BGO 闪烁体制成的 217 个井型磷光探测器单元阵列中的偏振。采用井型福斯维奇计数器概念和厚聚乙烯中子屏蔽提供了进行高灵敏度偏振测量所需的窄视场（1.25 msr）、大有效面积（40-50 keV 时 > 250 cm2）、高调制因子（超过 25%）和低背景（~100 mCrab）。通过在实验室和加速器设施中对具有飞行设计前端电子设备的缩小原型进行测试以及通过蒙特卡罗模拟进行广泛研究，我们展示了较高的仪器性能。 PoGOLite 将为 2009 年的首次工程飞行和 2010 年的科学飞行做好准备，在此期间将观测到来自蟹状星云/脉冲星、天鹅座 X-1 和其他天体的偏振信号。
The Polarized Gamma-ray Observer - Lightweight version (PoGOLite) is a new balloon experiment capable of detecting 10% polarization from a 200 mCrab source in the 25-80 keV energy range in a single 6-hour flight for the first time. Polarization measurements of hard X-rays and soft gamma-rays are expected to provide a powerful probe into high-energy emission mechanisms as well as source geometries. PoGOLite uses Compton scattering and photo-absorption to measure polarization in an array of 217 well-type phoswich detector cells made of plastic and BGO scintillators. The adoption of a well-type phoswich counter concept and a thick polyethylene neutron shield provides a narrow field-of-view (1.25 msr), a large effective area ( > 250 cm2 at 40-50 keV), a high modulation factor (more than 25%) and the low background (~100 mCrab) required to conduct high-sensitivity polarization measurements. Through tests in laboratories and accelerator facilities of a scaled-down prototype with the front-end electronics of flight design and an extensive study by Monte Carlo simulation, we have demonstrated high instrument performance. PoGOLite will be ready for a first engineering flight in 2009 and a science flight in 2010, during which polarization signals from the Crab Nebula/pulsar, Cygnus X-1 and other objects will be observed.