Title of article
Accurate measurement of the electron beam polarization in JLab Hall A using Compton polarimetry
Author/Authors
Escoffier، نويسنده , , S. and Bertin، نويسنده , , P.Y. and Brossard، نويسنده , , M. and Burtin، نويسنده , , E. and Cavata، نويسنده , , C. and Colombel، نويسنده , , N. G. de Jager، نويسنده , , C.W. and Delbart، نويسنده , , A. and Lhuillier، نويسنده , , Barry H. Schneider & Matthew D. Lee &Marie-France Maisonneuve & Sally M. Kuehn، نويسنده , , F. and Mitchell، نويسنده , , J. and Neyret، نويسنده , , D. and Pussieux، نويسنده , , T.، نويسنده ,
Pages
12
From page
563
To page
574
Abstract
A 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 μ A, 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.
Keywords
Polarized beams , Optical cavity , Compton polarimeter
Journal title
Astroparticle Physics
Record number
2026748
Link To Document