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Title: A novel comparison of Møller and Compton electron-beam polarimeters

We have performed a novel comparison between electron-beam polarimeters based on Moller and Compton scattering. A sequence of electron-beam polarization measurements were performed at low beam currents ($<$ 5 $$\mu$$A) during the $$Q_{\rm weak}$$ experiment in Hall C at Jefferson Lab. These low current measurements were bracketed by the regular high current (180 $$\mu$$A) operation of the Compton polarimeter. All measurements were found to be consistent within experimental uncertainties of 1% or less, demonstrating that electron polarization does not depend significantly on the beam current. This result lends confidence to the common practice of applying Moller measurements made at low beam currents to physics experiments performed at higher beam currents. Here, the agreement between two polarimetry techniques based on independent physical processes sets an important benchmark for future precision asymmetry measurements that require sub-1% precision in polarimetry.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5] ;  [1] ;  [2] ;  [6] ;  [7] ;  [3] ;  [8] ;  [9] ;  [6] ;  [3] ;  [10] ;  [6] ;  [6] ;  [1] ;  [11] more »;  [12] ;  [4] ;  [13] ;  [14] ;  [14] ;  [15] ;  [7] ;  [7] ;  [9] ;  [9] ;  [3] ;  [16] ;  [14] ;  [6] ;  [7] ;  [3] ;  [17] ;  [11] ;  [4] ;  [16] ;  [9] « less
  1. College of William and Mary, Williamsburg, VA (United States)
  2. Mississippi State Univ., Mississippi State, MS (United States)
  3. Univ. of Virginia, Charlottesville, VA (United States)
  4. Ohio Univ., Athens, OH (United States)
  5. Univ. of Virginia, Charlottesville, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  6. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  7. Univ. of Winnipeg, Winnipeg, MB (Canada)
  8. Univ. of Winnipeg, Winnipeg, MB (Canada); Univ. of Manitoba, Winnipeg, MB (Canada)
  9. Yerevan Physics Inst. (YerPhI), Yerevan (Armenia)
  10. Angelo State Univ., San Angelo, TX (United States)
  11. MIT Bates Linear Accelerator Center, Middleton, MA (United States)
  12. Univ. of Connecticut, Storrs, CT (United States)
  13. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  14. TRIUMF, Vancouver, BC (Canada)
  15. Univ. of Pittsburgh, Pittsburgh, PA (United States)
  16. Univ. of Manitoba, Winnipeg, MB (Canada)
  17. Hendrix College, Conway, AR (United States)
Publication Date:
Report Number(s):
JLAB-PHY-16-2333; DOE/OR/23177-3929; arXiv:1610.06083
Journal ID: ISSN 0370-2693; PII: S0370269317300333; TRN: US1700960
Grant/Contract Number:
AC05-06OR23177
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 766; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; electron polarimetry; Compton polarimeter; Møller polarimeter; Jefferson Lab
OSTI Identifier:
1343161
Alternate Identifier(s):
OSTI ID: 1342509