Electroluminescence and charge multiplication in liquid xenon with a VCC-like Microstrip Plate
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| Format: | Preprint |
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2025
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| author | Martínez-Lema, Gonzalo Chepel, Vitaly Breskin, Amos |
| author_facet | Martínez-Lema, Gonzalo Chepel, Vitaly Breskin, Amos |
| contents | We report on the first observation of electroluminescence and charge amplification with a Virtual Cathode Chamber (VCC) microstrips plate immersed in liquid xenon. Both were observed in an intense non-uniform electric field in the vicinity of 2-$μ$m narrow anode strips deposited, with a 2~mm pitch, on a semiconductive glass substrate (S8900), with a cathode film on its backside. An initial light yield of $\sim$460 VUV photons per drifting electron was measured, which degraded within tens of minutes stabilizing at (27.0~$\pm$~3.1)~photons per electron. The electroluminescence was accompanied by electron multiplication with an estimated charge gain $<$10. Further investigations are necessary to understand and mitigate the light yield degradation phenomenon. We expect other substrate materials, including VUV-transparent ones, to provide large stable photon yields, compatible with our model predictions. The VCC configuration has demonstrated great potential in single-phase noble-liquid detectors, particularly for dark-matter searches, neutrino physics and other fields. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_24611 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Electroluminescence and charge multiplication in liquid xenon with a VCC-like Microstrip Plate Martínez-Lema, Gonzalo Chepel, Vitaly Breskin, Amos Instrumentation and Detectors Instrumentation and Methods for Astrophysics High Energy Physics - Experiment We report on the first observation of electroluminescence and charge amplification with a Virtual Cathode Chamber (VCC) microstrips plate immersed in liquid xenon. Both were observed in an intense non-uniform electric field in the vicinity of 2-$μ$m narrow anode strips deposited, with a 2~mm pitch, on a semiconductive glass substrate (S8900), with a cathode film on its backside. An initial light yield of $\sim$460 VUV photons per drifting electron was measured, which degraded within tens of minutes stabilizing at (27.0~$\pm$~3.1)~photons per electron. The electroluminescence was accompanied by electron multiplication with an estimated charge gain $<$10. Further investigations are necessary to understand and mitigate the light yield degradation phenomenon. We expect other substrate materials, including VUV-transparent ones, to provide large stable photon yields, compatible with our model predictions. The VCC configuration has demonstrated great potential in single-phase noble-liquid detectors, particularly for dark-matter searches, neutrino physics and other fields. |
| title | Electroluminescence and charge multiplication in liquid xenon with a VCC-like Microstrip Plate |
| topic | Instrumentation and Detectors Instrumentation and Methods for Astrophysics High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2505.24611 |