Polarized $^3$He Target in High Magnetic Field at CLAS12
ORAL
Abstract
A nuclear spin polarized $^3$He target has proven a successful effective polarized neutron target in spin-dependent measurements of electron scattering from the neutron. Polarized $^3$He targets in low magnetic fields have been well developed using the spin exchange optical pumping technique. However, the application of a polarized $^3$He target in a high-magnetic-field environment is limited due to the increased wall relaxation. Taking advantage of recent improvements in high-field metastability exchange optical pumping, a novel double-cell cryogenic target has been designed to accommodate to the 5-T solenoid in Hall B at Jefferson Lab for a proposed experiment of spin-dependent electron scattering from a polarized $^3$He target at CLAS12. In this talk, the target design and recent progress in the target development will be presented.
*This work is supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract No. DE-FG02-94ER40818 and DE-AC05-06OR23177.
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Publication: [1] J. Maxwell and R. Milner, arXiv:1911.06650.
[2] JLab Conditionally Approved Proposal PR12-20-002: A Program of Spin-Dependent Electron Scattering from a Polarized $^3$He Target in CLAS12, Co-Spokespeople: Harut Avakian, James Maxwell, Richard Milner, Dien Nguyen.
Presenters
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Xiaqing Li
- Massachusetts Institute of Technology MI