High sensitivity balloon-borne hard X-ray/soft Gamma-ray polarimeter PoGOLite

T. Mizuno, M. Arimoto, M. Axelsson, C. I. Björnsson, G. Bogaert, P. Carlson, W. Craig, Y. Fukazawa, S. Gunji, L. Hjalmarsdotter, T. Kamae, Y. Kanai, J. Kataoka, J. Katsuta, N. Kawai, M. Kiss, W. Klamra, S. Larsson, G. Madejski, C. Marini BettoloJ. Ng, M. Pearce, F. Ryde, H. Tajima, H. Takahash, T. Takahashi, T. Tanaka, T. Thurston, M. Ueno, G. Varner, H. Yoshida

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

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.

本文言語English
ホスト出版物のタイトル2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
ページ2538-2544
ページ数7
DOI
出版ステータスPublished - 2007
外部発表はい
イベント2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC - Honolulu, HI, United States
継続期間: 2007 10 272007 11 3

出版物シリーズ

名前IEEE Nuclear Science Symposium Conference Record
4
ISSN(印刷版)1095-7863

Conference

Conference2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
国/地域United States
CityHonolulu, HI
Period07/10/2707/11/3

ASJC Scopus subject areas

  • 放射線
  • 核物理学および高エネルギー物理学
  • 放射線学、核医学およびイメージング

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