Flat-response neutron detector using spatial distribution of thermal neutrons in a moderator
| Autor: | Akira Unitani, Atsushi Yamazaki, Junpei Otsuka, Kenichi Watanabe, Yousuke Suzuki, Musashi Shigeyama |
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| Rok vydání: | 2011 |
| Předmět: |
Physics
Nuclear and High Energy Physics Neutron monitor Physics::Instrumentation and Detectors business.industry Astrophysics::High Energy Astrophysical Phenomena Monte Carlo method Detector Proportional counter Particle detector Neutron temperature Optics Neutron detection High Energy Physics::Experiment Neutron business Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 652:392-396 |
| ISSN: | 0168-9002 |
| DOI: | 10.1016/j.nima.2010.08.044 |
| Popis: | We propose a novel neutron detector that realized flat-response using information of a spatial distribution of thermal neutrons in a moderator. The proposed detector consists of a 3 He position sensitive proportional counter (PSPC) and a cylindrical moderator surrounding the 3 He PSPC. The cylindrical detector is irradiated by neutrons along the cylinder axis. The spatial response of the 3 He PSPC is used to correct the detector response into flat-response. We adopt a weighting method to achieve flat-response, in which detected neutrons weighted depending on their detected positions are accumulated as the detector response. Through Monte Carlo simulation studies, we confirm that the flat-response neutron detector can be realized by correcting the response of the proposed detector using the weights determined by a multiple least square method (MLSM). Additionally, fundamental property of the 3 He PSPC is experimentally investigated to check applicability to the proposed flat-response neutron detector. We conclude that we should take account of the end effect when determining the weights and correcting the detector response. |
| Databáze: | OpenAIRE |
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