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Title: A threshold gas Cerenkov detector for the spin asymmetries of the nucleon experiment

Journal Article · · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
 [1];  [2];  [1];  [1];  [1];  [3]
  1. Temple Univ., Philadelphia, PA (United States)
  2. Seoul National Univ. (Korea, Republic of)
  3. Temple Univ., Philadelphia, PA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
+ Show Author Affiliations

In this study, we report on the design, construction, commissioning, and performance of a threshold gas Cerenkov 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 known as the Big Electron Telescope Array, this Cerenkov counter served to identify scattered electrons and reject produced pions in an inclusive scattering experiment known as the Spin Asymmetries of the Nucleon Experiment E07-003 at the Thomas Jefferson National Accelerator Facility (TJNAF) also known as Jefferson Lab. The experiment consisted of a measurement of double spin asymmetries A|| and A⊥ of a polarized electron beam impinging on a polarized ammonia target. The Cerenkov 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 Cerenkov counter had enough resolution to identify electron-positron pairs from the conversion of photons resulting mainly from π0 decays.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC05-06OR23177; FG02-94ER4084
OSTI ID:
1221592
Alternate ID(s):
OSTI ID: 1247194
Report Number(s):
JLAB-PHY-15-2020; DOE/OR/23177-3320; arXiv:1503.03138; PII: S0168900215011055
Journal Information:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 804; ISSN 0168-9002
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

References (8)

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journal May 1999
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Geant4—a simulation toolkit
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journal July 2003
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journal September 2000

Cited By (2)

Revealing Color Forces with Transverse Polarized Electron Scattering text January 2018
Design and performance of the spin asymmetries of the nucleon experiment
  • Maxwell, J. D.; Armstrong, W. R.; Choi, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 885 https://doi.org/10.1016/j.nima.2017.12.008
journal March 2018

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
threshold gas Cerenkov detector
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