A threshold gas Cherenkov detector for the Spin Asymmetries of the Nucleon Experiment

被引：5

作者：

Armstrong, Whitney R. ^{[1
]}

Choi, Seonho ^{[2
]}

Kaczanowicz, Ed ^{[1
]}

Lukhanin, Alexander ^{[1
]}

Meziani, Zein-Eddine ^{[1
]}

Sawatzky, Brad ^{[1
,3
]}

机构：

[1] Temple Univ, Dept Phys, Philadelphia, PA 19122 USA

[2] Seoul Natl Univ, Seoul 151747, South Korea

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

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2015年 / 804卷

关键词：

Threshold gas Cherenkov detector; SANE; Particle identification; DEUTERON; PROTON; G(2);

D O I：

10.1016/j.nima.2015.09.050

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We report on the design, construction, commissioning, and performance of a threshold gas Cherenkov counter in an open configuration, which operates in a high luminosity environment and produces a high photo-electron yield. Part of a unique open geometry detector package called the Big Electron Telescope Array (BETA), this Cherenkov counter served to identify scattered electrons and reject produced pions in an inclusive scattering experiment known as the Spin Asymmetries of the Nucleon Experiment (SANE), E07-003 at Jefferson Lab. The experiment consisted of a measurement of double spin asymmetries A(parallel to) and Lambda(perpendicular to) of a polarized electron beam impinging on a polarized ammonia target. The Cherenkov counter's performance is characterised by a yield of about 20 photoelectrons per electron or positron track. Thanks to this large number of photoelectrons per track, the Cherenkov counter had enough resolution to identify electron-positron pairs from the conversion of photons resulting mainly from pi(0) decays. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：118 / 126

页数：9

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