The Pixel Charging-up effect in Gas Micro-Pixel Detectors
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866916345554141184 |
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| author | Yi, Difan Liu, Qian Liu, Hongbang Xie, Fei Feng, Huanbo Zhou, Lin Feng, Zuke Zheng, Yangheng |
| author_facet | Yi, Difan Liu, Qian Liu, Hongbang Xie, Fei Feng, Huanbo Zhou, Lin Feng, Zuke Zheng, Yangheng |
| contents | This study investigates the charging-up effect on the Topmetal-II- chip in Gas Micro-Pixel Detectors(GMPD). It is found that this effect differs from the charging-up typically observed in gas detector multiplier devices and increases the relative gain of the detector. The research indicates that this effect originates from the accumulation of charges on the insulating layer of the chip's pixel surface. Iterative simulations using COMSOL and GARFIELD++ are employed to model the variation of detector relative gain with the charging-up effect, and a simple yet effective model is proposed, which aligns well with experimental data. The feasibility of validating the deposition of resistive materials and adjusting the local voltage distribution on the chip to suppress charging-up effects and enhance the relative gain is also verified. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_15077 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Pixel Charging-up effect in Gas Micro-Pixel Detectors Yi, Difan Liu, Qian Liu, Hongbang Xie, Fei Feng, Huanbo Zhou, Lin Feng, Zuke Zheng, Yangheng Instrumentation and Detectors High Energy Physics - Experiment Nuclear Experiment This study investigates the charging-up effect on the Topmetal-II- chip in Gas Micro-Pixel Detectors(GMPD). It is found that this effect differs from the charging-up typically observed in gas detector multiplier devices and increases the relative gain of the detector. The research indicates that this effect originates from the accumulation of charges on the insulating layer of the chip's pixel surface. Iterative simulations using COMSOL and GARFIELD++ are employed to model the variation of detector relative gain with the charging-up effect, and a simple yet effective model is proposed, which aligns well with experimental data. The feasibility of validating the deposition of resistive materials and adjusting the local voltage distribution on the chip to suppress charging-up effects and enhance the relative gain is also verified. |
| title | The Pixel Charging-up effect in Gas Micro-Pixel Detectors |
| topic | Instrumentation and Detectors High Energy Physics - Experiment Nuclear Experiment |
| url | https://arxiv.org/abs/2402.15077 |