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arXiv 2302.08414physics.ins-detastro-ph.IM
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利用N型锗探测器研制5.2 K低质量暗物质探测器

Development of Low-Threshold Detectors for Low-Mass Dark Matter Searches Using an N-Type Germanium Detector at 5.2 K

Sanjay Bhattarai, Dongming Mei, Rajendra Panth, Mathbar Raut, Kyler Kooi, Hao Mei, Guojian Wang

摘要:

为了探索提高低质量暗物质探测灵敏度的新技术,我们研究了5.2 K时n型锗探测器中的电荷输运。偶极和团簇偶极态结合能和电场依赖的俘获截面的计算是发展低阈值探测器的关键。该探测器有两种工作模式:在冷却前在77K耗尽,或直接冷却到5.2K并施加不同的偏置电压。结果表明,在第二模式下,在零场和电场下的电荷态的结合能较低,表明不同的操作模式下形成不同的电荷态。在零场测量集群偶极和偶极态结合能分别为7.884 $\pm$ 0.644 meV和8.369 $\pm$ 0.748 meV,意味着未来低质量暗物质搜索的高低阈值潜力。

英文摘要:

We investigated charge transport in an n-type germanium detector at 5.2 K to explore new technology for enhancing low-mass dark matter detection sensitivity. Calculations of dipole and cluster dipole state binding energies and electric field-dependent trapping cross-sections are critical to developing low-threshold detectors. The detector operates in two modes: depleting at 77K before cooling, or directly cooling to 5.2 K and applying different bias voltages. Results indicated lower binding energy of charge states in the second mode, at zero field and under an electric field, suggesting different charge states formed under different operating modes. Measured cluster dipole and dipole state binding energies at zero field were 7.884$\pm$0.644 meV and 8.369$\pm$0.748 meV, respectively, signifying high low-threshold potential for low-mass dark matter searches in the future.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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