Development of <sup>3</sup>He-filled linear position-sensitive detector for neutron scattering instruments at CSNS

Lin Zhu; Jian-rong Zhou; Xin-feng Jiang; Xiao-juan Zhou; Wen-qin Yang; Yuan-Guang Xia; Liang Xiao; Hong Luo; Bei-ju Guan; Yan-feng Wang; Hong Xu; Pei-xun Shen; Hai-yun Teng; Jia-jie Li; Gui-an Yang; Ju-ping Xu; Huai-can Chen; Song-lin Wang; Jian Zhuang; Jun-rong Zhang; Wen Yin; Zhi-jia Sun; Yuan-bo Chen; Tianjiao Liang

doi:10.1007/s41605-022-00367-9

Volume 7 Issue 1

Mar. 2023

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Radiation Detection Technology and Methods > 2023 > 7(1): 100-106 > doi: 10.1007/s41605-022-00367-9

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Development of ³He-filled linear position-sensitive detector for neutron scattering instruments at CSNS

1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China;
2. Spallation Neutron Source Science Center, Dongguan, 523803, Guangdong, China;
3. University of Chinese Academy of Sciences, Beijing, 100049, China

Funds:

This work was supported by the National Key R&

amp

D Program of China [Grant No. 2021YFA1600703], the Strategic Priority Research Program of the Chinese Academy of Sciences [Grant No. XPB23], the National Natural Science Foundation of China [Grant No. 12175254].

More Information

Received Date: September 12, 2022
Accepted Date: November 14, 2022
Available Online: October 18, 2023
Published Date: November 27, 2022

Abstract

Abstract

Background Helium-3-filled linear position-sensitive detectors (LPSDs) have been widely applied to neutron scattering instruments in recent decades owing to the high detection efficiency, the excellent neutron/gamma discrimination, and the ability to construct the detector with large area coverage. More than 65% of neutron instruments at the China Spallation Neutron Source (CSNS) require ³He LPSDs for the building of the detector system. The detector of a neutron scattering instrument is normally an array detector composed of a large number of ³He LPSDs. However, no appropriate substitute detector is available for the ³He LPSD for operation over a short period, and its specifications need to be customized to satisfy the requirements of different instruments. This necessitates the development of ³He LPSDs with different specifications for building and upgrading the detectors of neutron scattering instruments at CSNS.
Purpose To meet the general requirements specified by the neutron instruments at CSNS, a ³He LPSD was developed and its performances were investigated by using the neutron beam.
Methods The neutron beam experiments for this ³He LPSD, including measurements of counting rate plateau curve, position calibration, and position resolution along the tube path, were carried out at the beamline-20 of CSNS. To evaluate its performance in the instrument operation, a detector module made of this ³He LPSD has been installed in the multi-physics instrument (MPI), and the comparison test with the commercial ³He LPSD has been conducted at neutron scattering experiments.
Results and conclusion The experimental measurements for this ³He LPSD based on the neutron beam showed that it satisfies the requirements for use in neutron scattering instruments. It reaches a plateau slope of 2.6%/100 V with a plateau range from 1750 to 1950 V and attained a minimal position resolution of 5.3 mm (FWHM), superior to the one achieved by the commercial ³He LPSD. In addition, this ³He LPSD detector module applied to the MPI has been working steadily for half of year and is available for use in experiments. These results provide a sound basis for the subsequent construction and upgradation of the detector of neutron scattering instruments at CSNS.
- Counting rate,
- CSNS,
- LPSD,
- Plateau curve,
- Position resolution

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References

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Lin Zhu, Jian-rong Zhou, Xin-feng Jiang, et al. Development of ³He-filled linear position-sensitive detector for neutron scattering instruments at CSNS[J]. Radiation Detection Technology and Methods, 2023, 7(1): 100-106. DOI: 10.1007/s41605-022-00367-9

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