The photon detector of the HERMES dual-radiator RICH

被引：2

作者：

Aschenauer, EC

Van der Kerckhove, K

机构：

[1] DESY, D-15738 Zeuthen, Germany

[2] State Univ Ghent, Dept Subatom Phys, B-9000 Ghent, Belgium

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1999年 / 433卷 / 1-2期

关键词：

Cherenkov counter; photomultipliers;

D O I：

10.1016/S0168-9002(99)00290-9

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

To provide hadron identification over the full kinematic range (2-20 GeV) of the HERMES experiment, the gas threshold Cherenkov counters were replaced by a dual-radiator ring-imaging Cherenkov detectors incorporating for the first time aerogel (SiO2) and C4F10 gas as radiator materials. This combination of radiators requires a photon detector that is sensitive over wavelengths from ultraviolet to 700 nm. Commercially available '3/4 in.' photo-multipliers were chosen to form an array of 2000 for each of two photon-detectors. Exhaustive calibration and sorting of the phototubes prior to installation resulted in very low noise hit rates in the LeCroy PCOS4 readout system, with a uniform effective threshold of 0.1 photo-electrons. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：168 / 171

页数：4

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