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


研究成果: Article査読


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.

ジャーナルPhysica E: Low-Dimensional Systems and Nanostructures
出版ステータスPublished - 2007 12月

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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