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Title: Upgraded photon calorimeter with integrating readout for Hall A Compton Polarimeter at Jefferson Lab

The photon arm of the Compton polarimeter in Hall A of Jefferson Lab has been upgraded to allow for electron beam polarization measurements with better than 1% accuracy. The data acquisition system (DAQ) now includes an integrating mode, which eliminates several systematic uncertainties inherent in the original counting-DAQ setup. The photon calorimeter has been replaced with a Ce-doped Gd2SiO5 crystal, which has a bright output and fast response, and works well for measurements using the new integrating method at electron beam energies from 1 to 6 GeV.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [1] ;  [1] ;  [4] ;  [4] ;  [5] ;  [5] ;  [1] ;  [6] ;  [6] ;  [5]
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States)
  2. Carnegie Mellon Univ., Pittsburgh, PA (United States); Univ. of Washington, Seattle, WA (United States). Center for Experimental Nuclear Physics and Astrophysics and Dept. of Physics
  3. Carnegie Mellon Univ., Pittsburgh, PA (United States); Christopher Newport Univ., Newport News, VA (United States)
  4. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  5. Univ. of Virginia, Charlottesville, VA (United States)
  6. Syracuse Univ., NY (United States). Dept. of Physics
Publication Date:
OSTI Identifier:
1038448
Report Number(s):
JLAB-PHY-11-1357; DOE/OR/23177-1730; arXiv:1108.3116
Journal ID: ISSN 0168-9002; NIMAER; TRN: US1201876
Grant/Contract Number:
AC05-06OR23177; FG02-87ER40315
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: 676; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; CALORIMETERS; DATA ACQUISITION SYSTEMS; ELECTRON BEAMS; PHOTONS; POLARIMETERS; POLARIZATION