TY - JOUR
T1 - Development of the balloon-borne sub-MeV gamma-ray Compton camera using an electron-tracking gaseous TPC and a scintillation camera
AU - Ueno, K.
AU - Mizumoto, T.
AU - Hattori, K.
AU - Higashi, N.
AU - Iwaki, S.
AU - Kabuki, S.
AU - Kishimoto, Y.
AU - Komura, S.
AU - Kubo, H.
AU - Kurosawa, S.
AU - Matsuoka, Y.
AU - Miuchi, K.
AU - Nakamura, K.
AU - Nishimura, H.
AU - Parker, J.
AU - Sato, Y.
AU - Sawano, T.
AU - Takada, A.
AU - Tanimori, T.
PY - 2012/1
Y1 - 2012/1
N2 - We have developed an Electron-Tracking Compton Camera (ETCC) for use onboard a balloon to observe sub-MeV/MeV gamma rays from celestial objects. The ETCC is constructed with a three dimensional gaseous tracker for recoil electrons from Compton scattering, and GSO:Ce pixel scintillator arrays as absorber of the Compton-scattered gamma-ray. By using the ETCC, we can reconstruct the energy and direction of individual gamma rays. We have developed a prototype ETCC with a (30 cm)3 TPC, and tested its performance in the range of 356 - 835 keV in the laboratory. As the result, we succeeded in taking images of gamma ray sources and determined a detection efficiency of 9.0 × 10-6 and an effective area of 8.0 × 10-3 cm2 at 662 keV for the prototype ETCC. Furthermore, we developed a new power saving readout circuit for the scintillators that achieves the electric power consumption of 0.41 W/channel, an energy dynamic range of 81 - 1333 keV, and an energy resolution of 10.3% at full width at half maximum at 662 keV.
AB - We have developed an Electron-Tracking Compton Camera (ETCC) for use onboard a balloon to observe sub-MeV/MeV gamma rays from celestial objects. The ETCC is constructed with a three dimensional gaseous tracker for recoil electrons from Compton scattering, and GSO:Ce pixel scintillator arrays as absorber of the Compton-scattered gamma-ray. By using the ETCC, we can reconstruct the energy and direction of individual gamma rays. We have developed a prototype ETCC with a (30 cm)3 TPC, and tested its performance in the range of 356 - 835 keV in the laboratory. As the result, we succeeded in taking images of gamma ray sources and determined a detection efficiency of 9.0 × 10-6 and an effective area of 8.0 × 10-3 cm2 at 662 keV for the prototype ETCC. Furthermore, we developed a new power saving readout circuit for the scintillators that achieves the electric power consumption of 0.41 W/channel, an energy dynamic range of 81 - 1333 keV, and an energy resolution of 10.3% at full width at half maximum at 662 keV.
KW - Baloon instrumentation
KW - Gamma telescopes
KW - Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc)
KW - Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)
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U2 - 10.1088/1748-0221/7/01/C01088
DO - 10.1088/1748-0221/7/01/C01088
M3 - Article
AN - SCOPUS:84856940704
SN - 1748-0221
VL - 7
JO - Journal of Instrumentation
JF - Journal of Instrumentation
IS - 1
M1 - C01088
ER -