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arXiv 1907.04568physics.ins-detnucl-ex
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基于TPC和塑料闪烁探测器的定向快中子探测系统性能研究

Performance study of a directional fast neutron detection system based on TPC and plastic scintillation detectors

Yidong Fu, Yang Tian, Yulan Li, Yigang Yang, Yiming Cai, Jian Yang, Jin Li

摘要:

中子时间投影室能高效率地定位中子热点的大致方向,视场为4π。通过增加几个塑料闪烁探测器和使用符合事件可以显著提高角分辨率。根据理论计算和实验结果,研究了这种符合成像系统的具体性能。对于当前系统,角分辨率的计算值约为2°,这与实验结果很好地吻合,并且为传统的基于反投影的在线重建方法的角分辨率设定了上限。虽然统计迭代法可以突破这一限制,进一步提高角分辨率,但时间消耗通常是个问题。符合成像系统可以进一步优化为未来的应用的基础上的理论模型。

英文摘要:

A neutron time projection chamber can locate the approximate direction of a neutron hot spot with high efficiency and a 4π field of view. The angular resolution can be significantly improved by adding several plastic scintillation detectors and using coincidence events. The specific performances of such a coincidence imaging system are studied based on theoretical calculations and experimental results. The calculated value of the angular resolution is approximately 2° for the current system, which agrees well with the experimental results and sets an upper limit for the angular resolution of traditional back projection based online reconstruction methods. Although the statistical iterative method can breakthrough this limit and further improve the angular resolution, the time consumption is usually a problem. The coincidence imaging system can be further optimized for future applications based on the theoretical model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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