The Observation of Diffuse Cosmic and Atmospheric Gamma Rays with an Electron-Tracking Compton Camera Loaded on a Balloon | Zendy

Atsushi Takada | Zendy; H. Kubo | Zendy; H. Nishimura | Zendy; K. Ueno | Zendy; T. Tanimori | Zendy; K. Miuchi | Zendy; Kenn'ichi Tsuchiya | Zendy; S. Kabuki | Zendy; K. Hattori | Zendy; Shunsuke Kurosawa | Zendy; Chihiro Ida | Zendy; Satoru Iwaki | Zendy; N. aka | Zendy; Eiichi Mizuta | Zendy

Open Access

The Observation of Diffuse Cosmic and Atmospheric Gamma Rays with an Electron-Tracking Compton Camera Loaded on a Balloon

Author(s) -

Atsushi Takada,

H. Kubo,

H. Nishimura,

K. Ueno,

T. Tanimori,

K. Miuchi,

Kenn'ichi Tsuchiya,

S. Kabuki,

K. Hattori,

Shunsuke Kurosawa,

Chihiro Ida,

Satoru Iwaki,

N. aka,

Eiichi Mizuta

Publication year - 2009

Publication title -

journal of the physical society of japan

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.76

H-Index - 139

eISSN - 1347-4073

pISSN - 0031-9015

DOI - 10.1143/jpsjs.78sa.161

Subject(s) - physics , gamma ray , telescope , cosmic ray , compton scattering , photon , gamma ray astronomy , tracking (education) , recoil , electron , optics , astrophysics , nuclear physics , pedagogy , psychology

As next-generation MeV gamma-ray telescope, we have developed an electron-tracking Compton camera (ETCC) that consists of a gaseous tracker and an absorber. The ETCC obtains the energy and direction of both a scattered gamma ray and a recoil electron, and determines both the energy and direction of an incident gamma ray, photon by photon. Furthermore, this camera features powerful background rejection based on Compton-scattering kinematics. To prepare for future spacecraft loading, we planned the balloon experiment, “Sub-MeV gamma-ray Imaging Loaded-on-balloon Experiment” (SMILE). As the first step in SMILE, we demonstrated gamma-ray detection using our camera by observing diffuse cosmic gamma rays and secondary gamma rays generated by collisions between high-energy cosmic rays and nuclei in the air. On September 1, 2006, our detector was loaded on a balloon and launched from Sanriku Balloon Center, ISAS/JAXA. The balloon realized level flight at an altitude of about 35 km during a live time of 3.0 h. We ...

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