GlueX启动计数器检测器
The GlueX Start Counter Detector
摘要：
介绍了GSTX启动计数器探测器的设计、模拟、制造、校准和性能。启动计数器的设计工作在集成速率高达9 MHz的时间分辨率范围为500至825 ps（半高宽）。启动计数器提供了出色的立体角覆盖范围，高度的背景抑制分割，并可用于实验的1级触发。它由一个圆柱形阵列的30个薄散热器与尖端弯曲的光束线在下游端。磁场不敏感的硅光电倍增器探测器被用作光传感器。
英文摘要：
The design, simulation, fabrication, calibration, and performance of the GlueX Start Counter detector is described. The Start Counter was designed to operate at integrated rates of up to 9 MHz with a timing resolution in the range of 500 to 825 ps (FWHM). The Start Counter provides excellent solid angle coverage, a high degree of segmentation for background rejection, and can be utilized in the level 1 trigger for the experiment. It consists of a cylindrical array of 30 thin scintillators with pointed ends that bend towards the beam line at the downstream end. Magnetic field insensitive silicon photomultiplier detectors were used as the light sensors.
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