arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2303.16807physics.ins-dethep-ex
收藏

利用低温下运行的p型锗探测器开发用于低质量暗物质搜寻的低阈值探测器

Development of low-threshold detectors for low-mass dark matter searches with a p-type germanium detector operated at cryogenic temperature

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

AI总结:

本研究通过分析5.2 K下p型锗探测器的电荷输运,精确计算了偶极子态结合能等关键参数,发现直接冷却模式产生更低结合能,为未来低质量暗物质低阈值探测器的开发提供了重要依据。

摘要:

本研究通过分析5.2 K下p型锗探测器中的电荷输运,探索提升低质量暗物质探测灵敏度的新技术。为实现低阈值探测器,必须精确计算偶极子和簇偶极子态的结合能,以及受电场影响的俘获截面。探测器以两种模式运行:在冷却至5.2 K前先在77 K下耗尽,以及施加不同偏压直接冷却至5.2 K。结果表明,第二种模式产生更低的结合能,并表明在不同运行模式下存在不同的电荷态。值得注意的是,我们在零场下测得的偶极子和簇偶极子态结合能分别为8.716±0.435 meV和6.138±0.308 meV。这些发现对未来开发用于探测低质量暗物质的低阈值探测器具有重要意义。

英文摘要:

This study investigates new technology for enhancing the sensitivity of low-mass dark matter detection by analyzing charge transport in a p-type germanium detector at 5.2 K. To achieve low-threshold detectors, precise calculations of the binding energies of dipole and cluster dipole states, as well as the cross-sections of trapping affected by the electric field, are essential. The detector was operated in two modes: depleted at 77 K before cooling to 5.2 K and cooled directly to 5.2 K with various bias voltages. Our results indicate that the second mode produces lower binding energies and suggests different charge states under varying operating modes. Notably, our measurements of the dipole and cluster dipole state binding energies at zero fields were $8.716\pm 0.435$ meV and $6.138\pm 0.308$ meV, respectively. These findings have strong implications for the development of low-threshold detectors for detecting low-mass dark matter 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。

↑