Anti-coincidence detector unit based on WLS fiber and SiPM readout
BackgroundComplete kinematic measurements in the medium or high-energy region is a common experimental method to study the structure and properties of exotic nuclides on the neutron-rich side. The experiment setup in the Cooling Storage Ring - Radioactive Ion Beam Line in Lanzhou (CSR-RIBLLII), a ty...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Science Press
2023-07-01
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| Series: | He jishu |
| Subjects: | |
| Online Access: | http://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2023.hjs.46.070401&lang=zh |
| _version_ | 1797737209626886144 |
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| author | WANG Ke SONG Haisheng FANG Fang YU Yuhong TANG Shuwen LIU Xiangman SUN Zhiyu MA Peng YANG Herun WANG Shitao ZHANG Xueheng YAN Duo ZHANG Yongjie |
| author_facet | WANG Ke SONG Haisheng FANG Fang YU Yuhong TANG Shuwen LIU Xiangman SUN Zhiyu MA Peng YANG Herun WANG Shitao ZHANG Xueheng YAN Duo ZHANG Yongjie |
| author_sort | WANG Ke |
| collection | DOAJ |
| description | BackgroundComplete kinematic measurements in the medium or high-energy region is a common experimental method to study the structure and properties of exotic nuclides on the neutron-rich side. The experiment setup in the Cooling Storage Ring - Radioactive Ion Beam Line in Lanzhou (CSR-RIBLLII), a typical nuclear external target facility, comprises many detectors with different requirements. The anticoincidence (Veto) detector is an essential part of the external target facility for eliminating the interference of charged particles and measuring medium or high-energy neutrons with high reliability and performance by combining them with a neutron wall detector. The original Veto detector with photomultiplier (PMT) readouts has many disadvantages, such as low detection efficiency and poor uniformity, resulting in significant differences or contradictions between experimental and calculation results.PurposeThis study aims to upgrade the original Veto detector using wave length shifter fiber (WLS) and silicon photomultiplier (SiPM) to improve the detection efficiency of charged particles.MethodsFirstly, a new configuration for the anticoincidence Veto detector unit was designed and the detector thickness was increased by 5 mm compared to the previous Veto detector, resulting in a final thickness of 1 cm. The Veto detector was embedded with 15, 7, and 3 WLS fibers from both ends, and read using SiPM. Furthermore, to systematically explore the performance of the detector unit, a linear relationship was calibrated between the number of photons of the SiPMs and the number of Analog-to-Digital Converter (ADC) channels. This relationship was used to accurately calculate the threshold value, laying a foundation for calculating detection efficiency. Then, based on Multi-Wire Proportional Chamber (MWPC), a detection efficiency test platform was established, and time position conversion and track selection data analysis methods were developed as test methods. Finally, a detailed test on the whole and each part of the anticoincidence Veto detector unit was carried out on the MWPC test platform.ResultsTest results show the highest anticoincidence efficiencies of SiPMs at both ends for the Veto detector embedded with 15, 7, and 3 WLS fibers are 99.99%, 99.94%, and 99.82%, respectively; increased by over 22.74% compared with the original Veto detector.ConclusionsThe new Veto detector based on WLS fiber and SiPM readout meets the needs of the CSR-RIBLLII external target facility. |
| first_indexed | 2024-03-12T13:25:11Z |
| format | Article |
| id | doaj.art-439cd78189db40b2a5b36722a52ae636 |
| institution | Directory Open Access Journal |
| issn | 0253-3219 |
| language | zho |
| last_indexed | 2024-03-12T13:25:11Z |
| publishDate | 2023-07-01 |
| publisher | Science Press |
| record_format | Article |
| series | He jishu |
| spelling | doaj.art-439cd78189db40b2a5b36722a52ae6362023-08-25T07:03:28ZzhoScience PressHe jishu0253-32192023-07-0146707040107040110.11889/j.0253-3219.2023.hjs.46.0704010253-3219（2023）07-0042-11Anti-coincidence detector unit based on WLS fiber and SiPM readoutWANG Ke0SONG Haisheng1FANG Fang2YU Yuhong3TANG Shuwen4LIU Xiangman5SUN Zhiyu6MA Peng7YANG Herun8WANG Shitao9ZHANG Xueheng10YAN Duo11ZHANG Yongjie12School of Physics and Electrical Engineering, Xibei Normal University, Lanzhou 730070, ChinaSchool of Physics and Electrical Engineering, Xibei Normal University, Lanzhou 730070, ChinaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaSchool of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, ChinaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaBackgroundComplete kinematic measurements in the medium or high-energy region is a common experimental method to study the structure and properties of exotic nuclides on the neutron-rich side. The experiment setup in the Cooling Storage Ring - Radioactive Ion Beam Line in Lanzhou (CSR-RIBLLII), a typical nuclear external target facility, comprises many detectors with different requirements. The anticoincidence (Veto) detector is an essential part of the external target facility for eliminating the interference of charged particles and measuring medium or high-energy neutrons with high reliability and performance by combining them with a neutron wall detector. The original Veto detector with photomultiplier (PMT) readouts has many disadvantages, such as low detection efficiency and poor uniformity, resulting in significant differences or contradictions between experimental and calculation results.PurposeThis study aims to upgrade the original Veto detector using wave length shifter fiber (WLS) and silicon photomultiplier (SiPM) to improve the detection efficiency of charged particles.MethodsFirstly, a new configuration for the anticoincidence Veto detector unit was designed and the detector thickness was increased by 5 mm compared to the previous Veto detector, resulting in a final thickness of 1 cm. The Veto detector was embedded with 15, 7, and 3 WLS fibers from both ends, and read using SiPM. Furthermore, to systematically explore the performance of the detector unit, a linear relationship was calibrated between the number of photons of the SiPMs and the number of Analog-to-Digital Converter (ADC) channels. This relationship was used to accurately calculate the threshold value, laying a foundation for calculating detection efficiency. Then, based on Multi-Wire Proportional Chamber (MWPC), a detection efficiency test platform was established, and time position conversion and track selection data analysis methods were developed as test methods. Finally, a detailed test on the whole and each part of the anticoincidence Veto detector unit was carried out on the MWPC test platform.ResultsTest results show the highest anticoincidence efficiencies of SiPMs at both ends for the Veto detector embedded with 15, 7, and 3 WLS fibers are 99.99%, 99.94%, and 99.82%, respectively; increased by over 22.74% compared with the original Veto detector.ConclusionsThe new Veto detector based on WLS fiber and SiPM readout meets the needs of the CSR-RIBLLII external target facility.http://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2023.hjs.46.070401&lang=zhexternal target facilityanticoincidence detectorwave length shifter fibersilicon photomultiplierdetection efficiency |
| spellingShingle | WANG Ke SONG Haisheng FANG Fang YU Yuhong TANG Shuwen LIU Xiangman SUN Zhiyu MA Peng YANG Herun WANG Shitao ZHANG Xueheng YAN Duo ZHANG Yongjie Anti-coincidence detector unit based on WLS fiber and SiPM readout He jishu external target facility anticoincidence detector wave length shifter fiber silicon photomultiplier detection efficiency |
| title | Anti-coincidence detector unit based on WLS fiber and SiPM readout |
| title_full | Anti-coincidence detector unit based on WLS fiber and SiPM readout |
| title_fullStr | Anti-coincidence detector unit based on WLS fiber and SiPM readout |
| title_full_unstemmed | Anti-coincidence detector unit based on WLS fiber and SiPM readout |
| title_short | Anti-coincidence detector unit based on WLS fiber and SiPM readout |
| title_sort | anti coincidence detector unit based on wls fiber and sipm readout |
| topic | external target facility anticoincidence detector wave length shifter fiber silicon photomultiplier detection efficiency |
| url | http://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2023.hjs.46.070401&lang=zh |
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