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arXiv 2009.10403physics.ins-detastro-ph.IMnucl-ex
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KATRIN差分泵送段中的中性氚气还原

Neutral tritium gas reduction in the KATRIN differential pumping sections

Alexander Marsteller, Beate Bornschein, Lutz Bornschein, Guido Drexlin, Fabian Friedel, Rainer Gehring, Steffen Grohmann, Rainer Gumbsheimer, Moritz Hackenjos, … 展开作者

Alexander Marsteller, Beate Bornschein, Lutz Bornschein, Guido Drexlin, Fabian Friedel, Rainer Gehring, Steffen Grohmann, Rainer Gumbsheimer, Moritz Hackenjos, Alexander Jansen, Andreas Kosmider, Luisa LaCascio, Steffen Lichter, Klaus Müller, Florian Priester, Rolf Rinderspacher, Marco Röllig, Carsten Röttele, Felix Sharipov, Michael Sturm, Stefan Welte, Joachim Wolf

摘要:

卡尔斯鲁厄氚中微子实验(KATRIN)的目的是利用氚衰变产生的$β$ -电子,以前所未有的$0.2\,\mathrm{eV}/\mathrm{c}^2$灵敏度测量有效电子反中微子质量。超导磁体系统通过真空束线引导电子从无窗气态氚源通过差分和低温泵送部分到高分辨率光谱仪和分段硅针检测器。同时,必须防止氚气体进入光谱仪。因此,泵送部分必须将氚流减少14个数量级以上。本文介绍了在KATRIN实验的第一次测量活动中,用高纯氚气测量差分抽运部分的降低因子。减少因子的结果与以前进行的模拟,以及严格的要求KATRIN实验进行比较。

英文摘要:

The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to measure the effective electron anti-neutrino mass with an unprecedented sensitivity of $0.2\,\mathrm{eV}/\mathrm{c}^2$, using $β$-electrons from tritium decay. The electrons are guided magnetically by a system of superconducting magnets through a vacuum beamline from the windowless gaseous tritium source through differential and cryogenic pumping sections to a high resolution spectrometer and a segmented silicon pin detector. At the same time tritium gas has to be prevented from entering the spectrometer. Therefore, the pumping sections have to reduce the tritium flow by more than 14 orders of magnitude. This paper describes the measurement of the reduction factor of the differential pumping section performed with high purity tritium gas during the first measurement campaigns of the KATRIN experiment. The reduction factor results are compared with previously performed simulations, as well as the stringent requirements of the KATRIN experiment.

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