arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1408.0264physics.ins-det
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使用MicroBooNE纯化系统的液态氩介电击穿研究

Liquid Argon Dielectric Breakdown Studies with the MicroBooNE Purification System

R. Acciarri, B. Carls, C. James, B. Johnson, H. Jostlein, S. Lockwitz, B. Lundberg, J. L. Raaf, R. Rameika, B. Rebel, G. P. Zeller, M. Zuckerbrot

摘要:

液态氩时间投影室探测器的激增使得液态氩的介电特性的表征成为一项关键任务。为了提高对这些性质的理解,使用连接到费米实验室MicroBooNE低温系统的专用低温恒温器对液氩中的击穿电场进行了系统的研究。使用直径为1.3 mm、5.0 mm和76 mm的球体实现电极球板几何形状。MicroBooNE低温系统允许在从百万分之几到万亿分之几十的各种负电性污染水平下进行测量。阴极-阳极距离从0.1 mm变化到2.5 cm。结果表明,击穿时的电场强度的几何依赖性。这项研究是第一次,击穿场的依赖性上的应力阴极面积已被证明为液态氩。

英文摘要:

The proliferation of liquid argon time projection chamber detectors makes the characterization of the dielectric properties of liquid argon a critical task. To improve understanding of these properties, a systematic study of the breakdown electric field in liquid argon was conducted using a dedicated cryostat connected to the MicroBooNE cryogenic system at Fermilab. An electrode sphere-plate geometry was implemented using spheres with diameters of 1.3 mm, 5.0 mm, and 76 mm. The MicroBooNE cryogenic system allowed measurements to be taken at a variety of electronegative contamination levels ranging from a few parts-per-million to tens of parts-per- trillion. The cathode-anode distance was varied from 0.1 mm to 2.5 cm. The results demonstrate a geometric dependence of the electric field strength at breakdown. This study is the first time that the dependence of the breakdown field on stressed cathode area has been shown for liquid argon.

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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