涂硼稻草管中子探测器将替代3He管探测器应用在清华大学微型脉冲强子源(CPHS)小角散射谱仪上。该文设计了针对该新型位置灵敏中子探测器的读出电子学系统, 通过分析探测器和前端电路的噪声, 得出了位置分辨率的估算方法, 并结合根据探测器输出信号特征优化了电路参数。对1.0 m长的涂硼稻草管及其读出电子学系统分别进行了电荷注入测试和中子束流测试, 位置分辨率的测试结果分别为2.7 mm和4.5 mm。实验结果表明:涂硼稻草管及其读出电子学系统的性能可以满足CPHS小角散射谱仪对中子位置测量的需求。
Abstract
Boron coated straw neutron detectors are being developed for use in the small-angle neutron scattering (SANS) instrument of the compact pulsed hadron source (CPHS) in Tsinghua University. This paper describes the readout electronics system for the position sensitive detector. The position resolution is estimated based on a noise analysis of the detector and the front end electronics. Then, the circuit parameters are optimized to improve the output signal characteristics. The position resolution of the detector and the readout electronics were evaluated using a charge injection test and a neutron beam test, with a position resolution of 2.7 mm in the charge injection test and 4.5 mm in the neutron beam test. The results that the detector and readout electronics meet the requirements for the neutron position measurement in the CPHS SANS instrument.
关键词
涂硼稻草管 /
读出电子学 /
位置灵敏 /
中子探测器
Key words
boron coated straw detector /
readout electronics /
position sensitivity /
neutron detector
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] Dana A, Daniel M. The Helium-3 shortage: Supply, demand, and options for congress [Z/OL]. (2010-12-22). http://fas.org/sgp/crs/misc/R41419.pdf.
[2] Lacy J L, Athanasiades A, Liang S, et al. Boron-coated straws as a replacement for 3He-based neutron detectors [J]. Nuclear Instruments and Methods in Physics Research Section A, 2011, 652: 359-363.
[3] Nakamura T, Katagiri M, Toh K, et al. A position-sensitive tubular scintillator-based detector as an alternative to a 3He-gas-based detector for neutron-scattering instruments [J]. Nuclear Instruments and Methods in Physics Research Section A, 2014, 741: 42-46.
[4] Richard T K, James H E, Luke E E, et al. Neutron detection alternatives to 3He for national security applications [J]. Nuclear Instruments and Methods in Physics Research Section A, 2010, 623: 1035-1045.
[5] Lacy J L, Athanasiades A, Shehad N N, et al. Novel neutron detector for high rate imaging applications [C]//IEEE Nuclear Science Symposium Conference Record. Norfolk, USA: IEEE, 2002: 392-396.
[6] CHEN Cai, YANG Yigang, ZHU Shounuo, et al. Study of boron-lined straw-tube detector array for neutron scattering measurement [C]//IEEE Nuclear Science Symposium Conference Record. Anaheim, USA: IEEE, 2012: 176-179.
[7] HUANG Tuchen, GONG Hui, SHAO Beibei, et al. A prototype of the linear position-sensitive detectors for CPHS [J]. Physics Procedia, 2012, 26: 31-35.
[8] CHEN Cai, GONG Hui, YANG Yigang, et al. Realization and test of position sensitive boron coated straw-tube [C]//IEEE Nuclear Science Symposium Conference Record. Seoul, Korea: IEEE, 2013: 1-4.
[9] Esch P V, Gahl T, Guérard B. Design criteria for electronics for resistive charge division in thermal neutron detection [J]. Nuclear Instruments and Methods in Physics Research Section A, 2004, 526: 493-500.
[10] Radeka V, Rehak P. Charge division mechanism on resistive electrode in position-sensitive detectors [J]. IEEE Transactions on Nuclear Science, 1979, 26(1): 225-238.
[11] 黄土琛, 宫辉, 邵贝贝. 位置灵敏3He管中子探测器前端电子学设计 [J]. 清华大学学报:自然科学版, 2012, 52(12):1731-1735.HUANG Tuchen, GONG Hui, SHAO Beibei. Design of the front-end electronics for linear position-sensitive 3He neutron detector [J]. Journal of Tsinghua University: Science and Technology, 2012, 52(12): 1731-1735. (in Chinese)
[12] Radeka V. Signal, noise and resolution in position-sensitive detectors [J]. IEEE Transactions on Nuclear Science, 1974, 21(1): 51-64.
[13] HUANG Tuchen, GONG Hui, SHAO Beibei, et al. Design of a new time-of-flight small-angle neutron scattering instrument at CPHS [J]. Physics Procedia, 2012, 26: 44-48.
PDF(1066 KB)
