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首页> 外文期刊>Journal of instrumentation: an IOP and SISSA journal >Test bench for fibers of the LHAASO-WCDA time calibration system
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Test bench for fibers of the LHAASO-WCDA time calibration system

机译:Lhaaso-WCDA时间校准系统纤维的测试台

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摘要

The Water Cherenkov Detector Array (WCDA), which is one of the main components of the Large High Altitude Air Shower Observatory (LHAASO), functions in surveying the northern sky for high-energy gamma ray sources at the energy range around of 100 GeV–30 TeV. The precision of the time measurement for shower particles hitting every detector in the array is directly associated with the detection sensitivity for the sources. The calibration precision of the time offsets among the detector cells should be less than 0.1 ns to obtain less than 0.1° pointing error of the detector to any point source. In this regard, "cross calibration" is employed for the detector array, with 180 bundles of fiber systems guiding the lights of LEDs to each PMT. A test bench comprising fast PMTs and an one-dimensional slide platform is set up in the laboratory to test the fiber bundles. The test bench and the test procedure is described in this paper, and the test results are presented.
机译:水Cherenkov探测器阵列(WCDA)是大型高空空气淋浴天文台(Lhaaso)的主要部件之一,在调查北方天空的高能量伽马射线源上的功能范围为100个GEV- 30 TEV。 阵雨粒子的时间测量的精度击中阵列中的每个检测器的每个检测器直接与源的检测灵敏度相关联。 检测器单元中的时间偏移的校准精度应小于0.1ns,以获得检测器的小于0.1°的指向误差。 在这方面,“交叉校准”用于检测器阵列,其中180套光纤系统引导LED的光线到每个PMT。 在实验室中建立包括快速PMT和一维幻灯片平台的测试台以测试纤维束。 本文描述了测试台和测试程序,并提出了测试结果。

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