Design and test of the calibration system of the MEGII Pixelated timing Counter
Design and test of the calibration system of the MEGII Pixelated timing Counter
复制标题
MEGII像素定时计数器校准系统的设计与测试
DOI：
10.1016/j.nima.2018.10.129
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
et al.
中科院分区：
文献类型：
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作者：
M. Rossella;et al.
摘要MEG II实验（Baldini等人，2018）[1]旨在提高对μ+→ e+ γ衰变的灵敏度。一个关键的组件是像素定时计数器（pTC），专用于测量正电子时间以减少组合背景（Cattaneo等人，2014; Nishimura等人，2016）[3，4]。该探测器由512个闪烁计数器组成，每个闪烁计数器都能精确测量正电子穿越时间。这种方法要求在实验寿命期间校准并定期监测计数器的时间偏移。pTC时间校准和监控系统将使用激光二极管向每个像素发送脉冲。系统各组成部分已在实验室进行了测试，结果表明，校准和监测分辨率满足要求。
Abstract The MEG II experiment (Baldini et al., 2018)[1] is designed to improve the sensitivity to the μ+→ e+ γ decay. A crucial component is the Pixelated Timing Counter (pTC), dedicated to the measurement of the positron time to reduce the combinatorial background (Cattaneo et al., 2014; Nishimura et al., 2016)[3, 4]. The detector consists of 512 scintillation counters, each performing a precise measurement of the positron crossing time. This approach requires that the time offsets of the counters are calibrated and regularly monitored over the lifetime of the experiment. The pTC time calibration and monitor system will use a laser diode to deliver pulses to each pixel. The system components have been tested in laboratory, the results demonstrate that a calibration and monitoring resolution satisfying the requirements is within reach.