Ultra-Low background germanium spectrometers at the China Jinping Underground Laboratory
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914166041739264 |
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| author | Chen, Jikai Zeng, Zhi Ma, Hao Cheng, Jianping |
| author_facet | Chen, Jikai Zeng, Zhi Ma, Hao Cheng, Jianping |
| contents | Four ultra-low background germanium spectrometers, called GeTHU, have been installed at the first phase of China Jinping Underground Laboratory (CJPL-I), and served for material screening of dark matter and neutrino experiments. Recently, a new multi-detector spectrometer with five germanium detectors has been developed and installed at the second phase of CJPL (CJPL-II) with a minimum detectable activity (MDA) of about 10 μBq/kg. In addition, another fifteen GeTHU-like spectrometers have been installed at CJPL-II with an MDA of about 1 mBq/kg. This paper will introduce the ultra-low background germanium spectrometers including shielding design, background characteristics and application to material screening. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_16704 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultra-Low background germanium spectrometers at the China Jinping Underground Laboratory Chen, Jikai Zeng, Zhi Ma, Hao Cheng, Jianping Instrumentation and Detectors Four ultra-low background germanium spectrometers, called GeTHU, have been installed at the first phase of China Jinping Underground Laboratory (CJPL-I), and served for material screening of dark matter and neutrino experiments. Recently, a new multi-detector spectrometer with five germanium detectors has been developed and installed at the second phase of CJPL (CJPL-II) with a minimum detectable activity (MDA) of about 10 μBq/kg. In addition, another fifteen GeTHU-like spectrometers have been installed at CJPL-II with an MDA of about 1 mBq/kg. This paper will introduce the ultra-low background germanium spectrometers including shielding design, background characteristics and application to material screening. |
| title | Ultra-Low background germanium spectrometers at the China Jinping Underground Laboratory |
| topic | Instrumentation and Detectors |
| url | https://arxiv.org/abs/2511.16704 |