Development of position sensitive Gamma-ray detector
| Project/Area Number |
15K17664
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
Hwang Sanghoon 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 先端基礎研究センター, 研究職 (80749862)
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| Project Period (FY) |
2015-04-01 – 2016-03-31
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| Project Status |
Discontinued (Fiscal Year 2015)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 粒子測定技術 / Time Projection Chamber / Gamma Detector |
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| Outline of Annual Research Achievements |
The measurement of radiative decay of the Λ(1405) can give important information of the structure of the Λ(1405), which is the Kbar-N bound state whether or not. In this research, we proposed to develop a position sensitive Gamma-ray-detector to study a radiative decay of the Λ(1405) by using Hyperon Time-Projection-Chamber, which is being built to explore an existence of the H-dibaryon and the 3-body hadronic nucleon resonances at the J-PARC hadron experimental facility.
A full simulation was performed to estimate the resolution and acceptance of the Λ(1405) based on the GEANT4 toolkit. The size of the Gamma-ray-detector was optimized based on the reconstructed position resolution. By assuming the 64 segments of the detector, the acceptance of the radiative decay is estimated to be 83.3%, while the background reduction is obtained to be more than 85%.
The test bench with 13 mm^2 size of MPPC and 2 x 1 x 80 cm^3 long plastic scintillator was performed. We obtained the timing resolution versus the ADC gain by using beta rays from Sr-90. The estimated timing resolution at MIP is about 130 ps. The thin plastic scintillator, however, is desired, because the space limitation of the super conducting Helmholtz-Coil was come. We newly fabricated new MPPC board to be optimize the gain and light collection efficiency. The board is being tested and the test board will be shared with the TPC hodoscope.
The simulation and test results were presented at the HYP2015 at Tohoku University in Sep. In addition, the progress has been reported at the E42 and E45 collaboration meeting.
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Report
(1 results)
Research Products
(2 results)
