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arXiv 1602.01974physics.ins-dethep-ex
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Nikhef双相氙气TPC的调试

Commissioning of a dual-phase xenon TPC at Nikhef

E. Hogenbirk, J. Aalbers, M. Bader, P. A. Breur, A. Brown, M. P. Decowski, C. Tunnell, R. Walet, A. P. Colijn

摘要:

一个双相氙时间投影室在阿姆斯特丹的Nikhef建造,作为直接暗物质探测的研发设施。在本文中,设置和第一个结果,从一个$^{22}$钠伽马射线源的校准。结果表明,平均光产额为(5.6 $\pm$ 0.3)光电子/keV(计算到122 keV和零场),电子寿命为(429 $\pm$ 26)$μ$ s。在能量为511 keV时,最佳能量分辨率$σ_E/E$为(5.8 $\pm$ 0.2)%。这是使用闪烁和电离信号的组合来实现的。提出了一种基于孤立电子电致发光信号的光电倍增管增益校准技术,并讨论了该技术的优点和局限性。

英文摘要:

A dual-phase xenon time-projection chamber was built at Nikhef in Amsterdam as a direct dark matter detection R&D facility. In this paper, the setup is presented and the first results from a calibration with a $^{22}$Na gamma-ray source are presented. The results show an average light yield of (5.6 $\pm$ 0.3) photoelectrons/keV (calculated to 122 keV and zero field) and an electron lifetime of (429 $\pm$ 26) $μ$s. The best energy resolution $σ_E/E$ is (5.8 $\pm$ 0.2)% at an energy of 511 keV. This was achieved using a combination of the scintillation and the ionization signals. A photomultiplier tube gain calibration technique, based on the electroluminescence signals occurring from isolated electrons, is presented and its advantages and limitations are discussed.

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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