Precise polarization measurements via detection of compton scattered electrons
- Manitoba Univ., Winnepeg (Canada)
- Mississippi State Univ., MS (United States)
- JLAB, Newport News, VA (United States)
The Qweak experiment at Jefferson Lab aims to make a 4% measurement of the parity-violating asymmetry in elastic scattering at very low Q{sup 2} of a longitudinally polarized electron beam off a proton target. One of the dominant experimental systematic uncertainties in Qweak will result from determining the beam polarization. A new Compton polarimeter was installed in the fall of 2010 to provide a non-invasive and continuous monitoring of the electron beam polarization in Hall C at Jefferson Lab. The Compton-scattered electrons are detected in four planes of diamond micro-strip detectors. We have achieved the design goals of <1% statistical uncertainty per hour and expect to achieve <1% systematic uncertainty.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC) (United States)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1114309
- Report Number(s):
- JLAB-PHY--14-1831; DOE/OR--23177-2958
- Journal Information:
- Physics of Particles and Nuclei, Journal Name: Physics of Particles and Nuclei Journal Issue: 1 Vol. 45; ISSN 1063-7796
- Country of Publication:
- United States
- Language:
- English
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