Speaker
Description
The astrophysical observations of MeV gamma rays have been limited by the detection technology, the so-called “MeV gap” has existed for long. Opening the MeV window is critical not only for gamma astronomy but also for searching for new physics.
To pursuit a high sensitivity in MeV gammas, a Compton camera using novel scintillators is developed. The Compton camera contains two layers of YSO-pixel array as gamma scatter and one layer of LYSO as gamma absorber, which is a pathfinder of the compact microsatellite project at SJTU. This presentation focuses on the design and calibration of the Compton camera, including the spatial nonuniformity and energy calibration, as well as the corresponding corrections. In addition, we have dedicatedly developed the algorithm to reconstruct the gamma tracks in the experimental data. Using cosmic muons and radioactive gamma sources, we validated the overall performance of the Compton camera and demonstrated its powerful detection ability for gamma in MeV energy range. This Compton camera is planned to piggyback a commercial microsatellite and its future in-orbit performance is promising.
| 请选择分会 | 粒子物理实验技术 |
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