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

2009 ◽  
Vol 78 (Suppl.A) ◽  
pp. 161-164 ◽  
Author(s):  
Atsushi Takada ◽  
Hidetoshi Kubo ◽  
Hironobu Nishimura ◽  
Kazuki Ueno ◽  
Toru Tanimori ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Compton Camera

OBSERVATION OF DIFFUSE COSMIC AND ATMOSPHERIC GAMMA RAYS AT BALLOON ALTITUDES WITH AN ELECTRON-TRACKING COMPTON CAMERA

2011 ◽  
Vol 733 (1) ◽  
pp. 13 ◽  
Author(s):  
Atsushi Takada ◽  
Hidetoshi Kubo ◽  
Hironobu Nishimura ◽  
Kazuki Ueno ◽  
Kaori Hattori ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Compton Camera

THE SIMULATION OF AN IMAGING GAMMA-RAY COMPTON BACKSCATTERING DEVICE USING GEANT4

2014 ◽  
Vol 27 ◽  
pp. 1460152
Author(s):  
D. FLECHAS ◽  
L.G. SARMIENTO ◽  
F. CRISTANCHO ◽  
E. FAJARDO
Keyword(s):  
Gamma Rays ◽  
Nuclear Physics ◽  
Gamma Ray ◽  
Structural Defects ◽  
Compton Camera ◽  
Experimental Conditions ◽  
Imaging Device ◽  
Compton Backscattering ◽  
National University ◽  
Simulated Images

A gamma-backscattering imaging device dubbed Compton Camera, developed at GSI (Darmstadt, Germany) and modified and studied at the Nuclear Physics Group of the National University of Colombia in Bogotá, uses the back-to-back emission of two gamma rays in the positron annihilation to construct a bidimensional image that represents the distribution of matter in the field-of-view of the camera. This imaging capability can be used in a host of different situations, for example, to identify and study deposition and structural defects, and to help locating concealed objects, to name just two cases. In order to increase the understanding of the response of the Compton Camera and, in particular, its image formation process, and to assist in the data analysis, a simulation of the camera was developed using the GEANT4 simulation toolkit. In this work, the images resulting from different experimental conditions are shown. The simulated images and their comparison with the experimental ones already suggest methods to improve the present experimental device

scholarly journals Development and performance verification of a 3-D position-sensitive Compton camera for imaging MeV gamma rays

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Hiroki Hosokoshi ◽  
Jun Kataoka ◽  
Saku Mochizuki ◽  
Masaki Yoneyama ◽  
Soichiro Ito ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Angular Resolution ◽  
Astronomical Observation ◽  
Large Field ◽  
Energy Bands ◽  
Compton Camera ◽  
Satellite Mission ◽  
Performance Verification ◽  
Position Sensitive

AbstractIn gamma-ray astronomy, the 1–10 MeV range is one of the most challenging energy bands to observe owing to low photon signals and a considerable amount of background contamination. This energy band, however, comprises a substantial number of nuclear gamma-ray lines that may hold the key to understanding the nucleosynthesis at the core of stars, spatial distribution of cosmic rays, and interstellar medium. Although several studies have attempted to improve observation of this energy window, development of a detector for astronomy has not progressed since NASA launched the Compton Gamma Ray Observatory (CGRO) in 1991. In this work, we first developed a prototype 3-D position-sensitive Compton camera (3D-PSCC), and then conducted a performance verification at NewSUBARU, Hyogo in Japan. To mimic the situation of astronomical observation, we used a MeV gamma-ray beam produced by laser inverse Compton scattering. As a result, we obtained sharp peak images of incident gamma rays irradiating from incident angles of 0° and 20°. The angular resolution of the prototype 3D-PSCC was measured by the Angular Resolution Measure and estimated to be 3.4° ± 0.1° (full width at half maximum (FWHM)) at 1.7 MeV and 4.0° ± 0.5° (FWHM) at 3.9 MeV. Subsequently, we conceived a new geometry of the 3D-PSCC optimized for future astronomical observations, assuming a 50-kg class small satellite mission. The SΩ of the 3D-PSCC is 11 cm2sr, anticipated at 1 MeV, which is small but provides an interesting possibility to observe bright gamma-ray sources owing to the high intrinsic efficiency and large field of view (FoV).

scholarly journals Precision imaging of 4.4 MeV gamma rays using a 3-D position sensitive Compton camera

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Ayako Koide ◽  
Jun Kataoka ◽  
Takamitsu Masuda ◽  
Saku Mochizuki ◽  
Takanori Taya ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Compton Camera ◽  
Position Sensitive
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