The aerogel threshold Cherenkov detector for the high momentum spectrometer in Hall C at Jefferson Lab

被引：11

作者：

Asaturyan, R ^{[1
]}

Ent, R

Fenker, H

Gaskell, D

Huber, GM

Jones, M

Mack, D

Mkrtchyan, H

Metzger, B

Novikoff, N

Tadevosyan, V

Vulcan, W

Wood, S

机构：

[1] Yerevan Phys Inst, Yerevan 375036, Armenia

[2] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[3] Univ Regina, Dept Phys, Regina, SK S4S 0A2, Canada

[4] Houston Baptist Univ, Houston, TX 77074 USA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2005年 / 548卷 / 03期

关键词：

particle identification; aerogel; diffusion box; photoelectron;

D O I：

10.1016/j.nima.2005.04.058

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We describe a new aerogel threshold Cherenkov detector installed in the HMS spectrometer in Hall C at Jefferson Lab. The Hall C experimental program in 2003 required an improved particle identification system for better identification of pi/K/p, which was achieved by installing an additional threshold Cherenkov counter. Two types of aerogel with n = 1.030 and n = 1.015 allow one to reach similar to 10(-3) proton and 10(-2) kaon rejection in the 1-5 GeV/c momentum range with pion detection efficiency better than 99% (97%). The detector response shows no significant position dependence due to a diffuse light collection technique. The diffusion box was equipped with 16 Photonis XP4572 photo multiplier tubes (PMTs). The mean number of photo-electrons in saturation was similar to 16 and similar to 8, respectively. This allows even for separation of slower particles slightly above threshold. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：364 / 374

页数：11

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