MeV gamma-ray Compton camera using a gaseous electron tracker for background-suppressed observation

A. Takada; T. Tanimori; H. Kubo; J. D. Parker; T. Mizumoto; Y. Mizumura; T. Sawano; K. Nakamura; Y. Matsuoka; S. Komura; S. Nakamura; M. Oda; K. Miuchi; S. Kurosawa

doi:10.1117/12.2055627

24 July 2014 MeV gamma-ray Compton camera using a gaseous electron tracker for background-suppressed observation

A. Takada, T. Tanimori, H. Kubo, J. D. Parker, T. Mizumoto, Y. Mizumura, T. Sawano, K. Nakamura, Y. Matsuoka, S. Komura, S. Nakamura, M. Oda, K. Miuchi, S. Kurosawa

Author Affiliations +

Proceedings Volume 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray; 91440G (2014) https://doi.org/10.1117/12.2055627
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

As a next generation MeV gamma-ray telescope, we develop an electron-tracking Compton camera (ETCC) that consists of a gaseous electron tracker surrounded by pixel scintillator arrays. The tracks of the Compton-recoil electron measured by the tracker restrict the incident gamma-ray direction to an arc region on the sky and reject background by using the energy loss rate dE/dx and a Compton-kinematics test. In 2013, we constructed, for a balloon experiment, a 30-cm-cubic ETCC with an effective area of ~1 cm² for detecting sub-MeV gamma rays (5 σ detection of the Crab Nebula for 4 h). In future work, we will extend this ETCC to an effective area of ~10 cm². In the present paper, we report the performance of the current ETCC.

Citation Download Citation

A. Takada, T. Tanimori, H. Kubo, J. D. Parker, T. Mizumoto, Y. Mizumura, T. Sawano, K. Nakamura, Y. Matsuoka, S. Komura, S. Nakamura, M. Oda, K. Miuchi, and S. Kurosawa "MeV gamma-ray Compton camera using a gaseous electron tracker for background-suppressed observation", Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 91440G (24 July 2014); https://doi.org/10.1117/12.2055627

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