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

Abstract

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.

Authors:
 [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)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1221592
Alternate Identifier(s):
OSTI ID: 1247194
Report Number(s):
JLAB-PHY-15-2020; DOE/OR/23177-3320; arXiv:1503.03138
Journal ID: ISSN 0168-9002; PII: S0168900215011055
Grant/Contract Number:  
AC05-06OR23177; FG02-94ER4084
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 804; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; threshold gas Cerenkov detector; SANE; particle identification

Citation Formats

Armstrong, Whitney R., Choi, Seonho, Kaczanowicz, Ed, Lukhanin, Alexander, Meziani, Zein -Eddine, and Sawatzky, Brad D. A threshold gas Cerenkov detector for the spin asymmetries of the nucleon experiment. United States: N. p., 2015. Web. doi:10.1016/j.nima.2015.09.050.
Armstrong, Whitney R., Choi, Seonho, Kaczanowicz, Ed, Lukhanin, Alexander, Meziani, Zein -Eddine, & Sawatzky, Brad D. A threshold gas Cerenkov detector for the spin asymmetries of the nucleon experiment. United States. https://doi.org/10.1016/j.nima.2015.09.050
Armstrong, Whitney R., Choi, Seonho, Kaczanowicz, Ed, Lukhanin, Alexander, Meziani, Zein -Eddine, and Sawatzky, Brad D. Sat . "A threshold gas Cerenkov detector for the spin asymmetries of the nucleon experiment". United States. https://doi.org/10.1016/j.nima.2015.09.050. https://www.osti.gov/servlets/purl/1221592.
@article{osti_1221592,
title = {A threshold gas Cerenkov detector for the spin asymmetries of the nucleon experiment},
author = {Armstrong, Whitney R. and Choi, Seonho and Kaczanowicz, Ed and Lukhanin, Alexander and Meziani, Zein -Eddine and Sawatzky, Brad D.},
abstractNote = {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.},
doi = {10.1016/j.nima.2015.09.050},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = ,
volume = 804,
place = {United States},
year = {Sat Sep 26 00:00:00 EDT 2015},
month = {Sat Sep 26 00:00:00 EDT 2015}
}

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Works referencing / citing this record:

Revealing Color Forces with Transverse Polarized Electron Scattering
text, January 2018


Design and performance of the spin asymmetries of the nucleon experiment
journal, March 2018

  • 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
  • DOI: 10.1016/j.nima.2017.12.008