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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
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Abstract

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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P. Haridas, I. A. Pless, G. Van Buren, J. Tomasi, M. S. Z. Rabin, K. Barish, R. D. Majka. 1998-01-30. A 10 MHz beam counter and a multiplicity detector for the E864 spectrometer. https://doi.org/10.1016/s0168-9002(96)01162-x

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