The KamLAND full-volume calibration system
The KamLAND full-volume calibration system
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DOI：
10.1088/1748-0221/4/04/p04017
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发表时间：
2009-03
影响因子：
1.3
通讯作者：
The KamLAND Collaboration
中科院分区：
文献类型：
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作者：
The KamLAND Collaboration
我们已经成功地为KamLAND探测器建立并运行了一个源部署系统。该系统用于在整个1千吨液体闪烁体体积中定位放射源，同时满足严格的材料清洁度、材料相容性和安全要求。利用该装置获得的标定数据，充分表征了探测器的位置和能量重构偏差。结果，探测器基准体积大小的不确定度降低了两倍。在使用该系统校准之前，基准体积是测量KamLAND探测到的反中微子数量时系统不确定度的最大来源。本文介绍了这种独特的校准系统的设计、工作原理和性能。
We have successfully built and operated a source deployment system for the KamLAND detector. This system was used to position radioactive sources throughout the delicate 1-kton liquid scintillator volume, while meeting stringent material cleanliness, material compatibility, and safety requirements. The calibration data obtained with this device were used to fully characterize detector position and energy reconstruction biases. As a result, the uncertainty in the size of the detector fiducial volume was reduced by a factor of two. Prior to calibration with this system, the fiducial volume was the largest source of systematic uncertainty in measuring the number of antineutrinos detected by KamLAND. This paper describes the design, operation and performance of this unique calibration system.