论文标题
FNAL上的伊卡洛斯低温光检测系统的校准
Calibration of the ICARUS cryogenic photo-detection system at FNAL
论文作者
论文摘要
伊卡洛斯光检测系统的校准基于405 nm处的低功率激光二极管。激光脉冲到达一个光学开关，然后将长20米的光学贴剂发送至36 UHV法兰。然后将光线传递到连接到单个法兰的十个PMT，并通过7m长的注射光斑。相对于原始的组件，对光学系统设计中使用的组件和护理的广泛测试已确保每个PMT都具有最小的校准信号，相对于原始校准信号。 PMT的增益均衡已达到1％的分辨率。在此过程中，还使用了来自背景光子的数据。 PMTS信号到达时间的分布具有分辨率小于1 ns的分布，从而可以很好地确定绝对事件时序。将报告激光校准系统及其可能升级的状态。
The calibration of the ICARUS photo-detection system is based on a low power laser diode at 405 nm. Laser pulses arrive to one optical switch and then are sent to 36 UHV flanges, by 20 meters long optical patches. Light is then delivered to the ten PMTs connected to a single flange, by 7m long injection optical patches. Extensive tests of the used components and care in the design of the optical system have guaranteed to each PMT a sizeable calibration signal with minimal distortion, with respect to the original one. Gain equalization of PMTs has reached a 1 per cent resolution. In this procedure data from background photons were also used. The distribution of the PMTs signal arrival time has a distribution with a resolution less than 1 ns, thus allowing a good determination of the absolute event timing. The status of the laser calibration system with its possible upgrades will be reported.
