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29 March 2024
 
  » arxiv » physics/0504195

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Accurate measurement of the electron beam polarization in JLab Hall A using Compton polarimetry
S. Escoffier ; P.Y. Bertin ; M. Brossard ; E. Burtin ; C. Cavata ; N. Colombel ; C.W. de Jager ; A. Delbart ; D. Lhuillier ; F. Marie ; J. Mitchell ; D. Neyret ; T. Pussieux ;
Date 27 Apr 2005
Journal Nucl.Instrum.Meth. A551 (2005) 563-574
Subject Instrumentation and Detectors | physics.ins-det
AbstractA major advance in accurate electron beam polarization measurement has been achieved at Jlab Hall A with a Compton polarimeter based on a Fabry-Perot cavity photon beam amplifier. At an electron energy of 4.6 GeV and a beam current of 40 uA, a total relative uncertainty of 1.5% is typically achieved within 40 min of data taking. Under the same conditions monitoring of the polarization is accurate at a level of 1%. These unprecedented results make Compton polarimetry an essential tool for modern parity-violation experiments, which require very accurate electron beam polarization measurements.
Source arXiv, physics/0504195
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