Upgraded photon calorimeter with integrating readout for the Hall A Compton polarimeter at Jefferson Lab

  • M. Friend
  • , D. Parno
  • , F. Benmokhtar
  • , A. Camsonne
  • , M. M. Dalton
  • , G. B. Franklin
  • , V. Mamyan
  • , R. Michaels
  • , S. Nanda
  • , V. Nelyubin
  • , K. Paschke
  • , B. Quinn
  • , A. Rakhman
  • , P. Souder
  • , A. Tobias

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

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 (DAQ) system 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 Gd 2SiO 5 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.

Original languageEnglish
Pages (from-to)96-105
Number of pages10
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume676
DOIs
StatePublished - Jun 1 2012
Externally publishedYes

Funding

This work was supported by DOE Grants DE-AC05-06OR23177 , under which Jefferson Science Associates, LLC, operate Jefferson Lab , and DE-FG02-87ER40315 .

Keywords

  • Compton polarimeter
  • Electron beam polarimetry
  • Integrating DAQ
  • Jefferson Laboratory

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