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arXiv physics/9801033physics.ins-det
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E864谱仪的10 MHz束流计数器和多重数探测器

A 10 MHz beam counter and a multiplicity detector for the E864 spectrometer

P. Haridas, I. A. Pless, G. Van Buren, J. Tomasi, M. S. Z. Rabin, K. Barish, R. D. Majka

摘要:

BNL的E864实验需要一个束流计数器和多重性检测器系统,该系统可以以每秒10^7个Au离子的入射束流速率运行。在1994年的第一次实验中,我们已经研制并测试了150微米厚的石英切伦科夫束计数器和基于闪烁体的多重触发计数器。我们得到的时间分辨率为78 ps的光束计数器在入射光束速率为5 × 10^5 Hz和100 ps的速率为1 × 10^7 Hz。脉冲高度鉴别用于从多重性检测器获得最小偏差和10%中心性触发。多重性计数器的时间分辨率为250 ps。

英文摘要:

The E864 experiment at BNL requires a beam counter and multiplicity detector system that can perform at an incident beam rate of 10^7 Au ions per second. We have developed and tested a 150 micrometer thick quartz Cherenkov beam counter and a scintillator based multiplicity-trigger counter during the first run of this experiment in 1994. We obtained a time resolution of 78 ps for the beam counter at an incident beam rate 5 x 10^5 Hz and 100 ps at a rate of 1 x 10^7 Hz. Pulse height discrimination is used to obtain a minimum bias and a 10% centrality trigger from the multiplicity detectors. The multiplicity counter has a time resolution of 250 ps.

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