Low energy response of a prototype detector array for the PoGO astronomical hard X-ray polarimeter

J. Kataoka, M. Kanal, T. Arimoto, T. Ikagawa, M. Saito, N. Ueno, R. Kawai, P. Blandford, T. Chen, G. Kamae, T. Madejski, J. Mizuno, H. Ng, T. Tajima, L. Thurston, A. Barbier, J. Harding, S. Krizmanic, J. Hunter, R. MitchellE. Streitmatter, R. Groth, D. Fernholtz, Y. Marlow, T. Saito, S. Takahashi, H. Gunji, Y. Sakurai, V. Fukazawa, P. Anderson, W. Carlson, M. Klamra, M. Pearce, S. Suhonen, F. Larsson, C. I. Ryde, G. Bjornsson, S. Bogaert, Kishimoto

研究成果: Conference article

3 引用 (Scopus)

抜粋

The Polarized Gamma-ray Observer (PoGO) is a new balloon-borne instrument designed to measure polarization from astrophysical objects in the 30-200 keV range. It is under development for the first flight anticipated in 2008. PoGO is designed to minimize the background by an improved phoswich configuration, which enables a detection of 10 % polarization in a 100 mCrab source in a 6-8 hour observation. To achieve such high sensitivity, low energy response of the detector is important because the source count rate is generally dominated by the lowest energy photons. We have developed new PMT assemblies specifically designed for PoGO to read-out weak scintillation light of one photoelectron (1 p.e.) level. A beam test of a prototype detector array was conducted at the KEK Photon Factory, Tsukuba in Japan. The experimental data confirm that PoGO can detect polarization of 80-85 % polarized beam down to 30 keV with a modulation factor 0.25 ± 0.05.

元の言語English
記事番号58980J
ページ(範囲)1-11
ページ数11
ジャーナルProceedings of SPIE - The International Society for Optical Engineering
5898
DOI
出版物ステータスPublished - 2005 12 1
外部発表Yes
イベントUV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIV - San Diego, CA, United States
継続期間: 2005 8 12005 8 3

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • これを引用

    Kataoka, J., Kanal, M., Arimoto, T., Ikagawa, T., Saito, M., Ueno, N., Kawai, R., Blandford, P., Chen, T., Kamae, G., Madejski, T., Mizuno, J., Ng, H., Tajima, T., Thurston, L., Barbier, A., Harding, J., Krizmanic, S., Hunter, J., ... Kishimoto (2005). Low energy response of a prototype detector array for the PoGO astronomical hard X-ray polarimeter. Proceedings of SPIE - The International Society for Optical Engineering, 5898, 1-11. [58980J]. https://doi.org/10.1117/12.613621