A compact ultra-clean system for deploying radioactive sources inside the KamLAND detector
A compact ultra-clean system for deploying radioactive sources inside the KamLAND detector
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DOI：
10.1016/j.nima.2014.09.068
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发表时间：
2014-07
影响因子：
1.4
通讯作者：
T. Banks;T. Banks;S. Freedman;S. Freedman;S. Freedman;J. Wallig;N. Ybarrolaza;A. Gando;Y. Gan
中科院分区：
文献类型：
--
作者：
T. Banks;T. Banks;S. Freedman;S. Freedman;S. Freedman;J. Wallig;N. Ybarrolaza;A. Gando;Y. Gan
我们描述了一个紧凑的，超干净的装置，用于沿着KamLAND液体闪烁中微子探测器的垂直轴部署放射源，以进行校准。该设备的工作原理是放出并卷取精确长度的悬挂式小规格钢丝绳（电缆）；各种可互换的放射源可以连接到电缆末端的砝码上。暴露于放射性液体闪烁体的所有组件都由化学相容的特高压清洁材料制成，主要是不锈钢，以避免污染或降解闪烁体。为了防止氡侵入，仪器被密封在手套箱内的密封外壳中，两卷都定期用净化的氮气冲洗。附在外壳侧面的红外摄像机允许对电缆的运动进行实时视觉监控，并且该系统通过图形用户界面进行控制。
We describe a compact, ultra-clean device used to deploy radioactive sources along the vertical axis of the KamLAND liquid-scintillator neutrino detector for purposes of calibration. The device worked by paying out and reeling in precise lengths of a hanging, small-gauge wire rope (cable); an assortment of interchangeable radioactive sources could be attached to a weight at the end of the cable. All components exposed to the radiopure liquid scintillator were made of chemically compatible UHV-cleaned materials, primarily stainless steel, in order to avoid contaminating or degrading the scintillator. To prevent radon intrusion, the apparatus was enclosed in a hermetically sealed housing inside a glove box, and both volumes were regularly flushed with purified nitrogen gas. An infrared camera attached to the side of the housing permitted real-time visual monitoring of the cable׳s motion, and the system was controlled via a graphical user interface.