Characterization of a CsI(Tl) Scintillator Coupled to a SiPM at Cryogenic Temperatures
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866917089560756224 |
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| author | Mirzakhani, M. Mahapatra, R. Platt, M. |
| author_facet | Mirzakhani, M. Mahapatra, R. Platt, M. |
| contents | We report on the scintillation characterization of a 1 cm^3 CsI(Tl) crystal coupled to a 6 x 6 mm^2 SiPM read out with a custom transimpedance amplifier at cryogenic temperatures. The crystal was prepared with optical-grade surfaces and enclosed in a multi layer shielding system to suppress ambient light and background radiation. The detector response was studied at temperatures ranging from 100 K to room temperature. A figure of merit, defined as the ratio of the 59.5 keV peak position to the baseline resolution, showed a maximum at 175 K, indicating optimal photon detection efficiency. Pulse shape analysis demonstrated temperature-dependent variations in scintillation decay. At 175 K, the baseline resolution was sigma ~ 1 keV, corresponding to an effective threshold of ~ 3 keV. These results confirm the capability of the CsI(Tl) SiPM system to operate at low thresholds for rare-event searches and low-energy particle detection. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_14605 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Characterization of a CsI(Tl) Scintillator Coupled to a SiPM at Cryogenic Temperatures Mirzakhani, M. Mahapatra, R. Platt, M. Instrumentation and Detectors High Energy Physics - Experiment We report on the scintillation characterization of a 1 cm^3 CsI(Tl) crystal coupled to a 6 x 6 mm^2 SiPM read out with a custom transimpedance amplifier at cryogenic temperatures. The crystal was prepared with optical-grade surfaces and enclosed in a multi layer shielding system to suppress ambient light and background radiation. The detector response was studied at temperatures ranging from 100 K to room temperature. A figure of merit, defined as the ratio of the 59.5 keV peak position to the baseline resolution, showed a maximum at 175 K, indicating optimal photon detection efficiency. Pulse shape analysis demonstrated temperature-dependent variations in scintillation decay. At 175 K, the baseline resolution was sigma ~ 1 keV, corresponding to an effective threshold of ~ 3 keV. These results confirm the capability of the CsI(Tl) SiPM system to operate at low thresholds for rare-event searches and low-energy particle detection. |
| title | Characterization of a CsI(Tl) Scintillator Coupled to a SiPM at Cryogenic Temperatures |
| topic | Instrumentation and Detectors High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2511.14605 |