Performance assessment study of the balloon-borne astronomical soft gamma-ray polarimeter PoGOLite

M. Arimoto*, Y. Kanai, M. Ueno, J. Kataoka, N. Kawai, T. Tanaka, K. Yamamoto, H. Takahashi, T. Mizuno, Y. Fukazawa, M. Axelsson, M. Kiss, C. Marini Bettolo, P. Carlson, W. Klamra, M. Pearce, P. Chen, B. Craig, T. Kamae, G. MadejskiJ. S.T. Ng, R. Rogers, H. Tajima, T. S. Thurston, Y. Saito, T. Takahashi, S. Gunji, C. I. Bjornsson, S. Larsson, F. Ryde, G. Bogaert, G. Varner

*この研究の対応する著者

研究成果: Article査読

抄録

Measurements of polarization play a crucial role in the understanding of the dominant emission mechanism of astronomical sources. Polarized Gamma-ray Observer-Light version (PoGOLite) is a balloon-borne astronomical soft gamma-ray polarimeter at the 25-80 keV band. The PoGOLite detector consists of a hexagonal close-packed array of 217 Phoswich detector cells (PDCs) and side anti-coincidence shields (SASs) made of BGO crystals surrounding PDCs. Each PDC consists of a slow hollow scintillator, a fast scintillator and a BGO crystal that connects to a photomultiplier tube at the end. To examine the PoGOLite's capability and estimate the performance, we conducted experiments with the PDC using radioisotope 241Am. In addition, we compared this result with performance expected by Monte Carlo simulation with Geant4. As a result, we found that the actual PDC has the capability to detect a 100 m Crab source until 80 keV.

本文言語English
ページ(範囲)438-441
ページ数4
ジャーナルPhysica E: Low-Dimensional Systems and Nanostructures
40
2
DOI
出版ステータスPublished - 2007 12月
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 凝縮系物理学

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