Accurate measurement of the electron beam polarization in JLab Hall A using Compton polarimetry

Journal Article · Sun May 01 00:00:00 EDT 2005 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2005.05.067· OSTI ID:840071

Escoffier, S; Bertin, P Y; Brossard, M; Burtin, E; Cavata, C; Colombel, N; de Jager, C W; Delbart, A; Lhuillier, D; Marie, F; Mitchell, J; Neyret, D; Pussieux, T

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 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.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
• Sponsoring Organization: US Department of Energy; USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 840071
• Report Number(s): JLAB-PHY-05-302; DOE/ER/40150-3380; physics/0504195
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Journal Issue: 2-3 Vol. 551; ISSN 0168-9002
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM CURRENTS
CEBAF ACCELERATOR
COMPTON EFFECT
ELECTRON BEAMS
PHOTON BEAMS
POLARIMETERS
POLARIMETRY
POLARIZATION