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arXiv physics/0611129physics.ins-det
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COMPASS RICH探测器的快速光子探测

Fast photon detection for the COMPASS RICH detector

C. Schill

摘要:

在欧洲核子研究中心的SPS加速器上进行的COMPASS实验使用了一个大规模的环形成像CHerenkov探测器(RICH)来识别宽动量范围内的π介子、K介子和质子。对于2006年的数据采集,COMPASS RICH在中央光子探测区域(25%的表面)进行了升级,采用了一种新技术,以每秒10^6个的极高计数率探测切伦科夫光子,并采用了一种新的无死区读出系统,其触发速率高达100 kHz。切伦科夫光子被576个可见光和紫外光敏感的多阳极光电倍增管阵列探测到,每个光电倍增管有16个通道。升级后的探测器在2006年的数据采集中表现出色。

英文摘要:

The COMPASS experiment at the SPS accelerator at CERN uses a large scale Ring Imaging CHerenkov detector (RICH) to identify pions, kaons and protons in a wide momentum range. For the data taking in 2006, the COMPASS RICH has been upgraded in the central photon detection area (25% of the surface) with a new technology to detect Cherenkov photons at very high count rates of several 10^6 per second and channel and a new dead-time free read-out system, which allows trigger rates up to 100 kHz. The Cherenkov photons are detected by an array of 576 visible and ultra-violet sensitive multi-anode photomultipliers with 16 channels each. The upgraded detector showed an excellent performance during the 2006 data taking.

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