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Title: Dynamically polarized target for the g{sub 2}{sup p} and G{sub E}{sup p} experiments at Jefferson Lab

Recently, two experiments were concluded in Hall A at Jefferson Lab which utilized a newly assembled, solid, polarized hydrogen target. The primary components of the target are a new, high cooling power {sup 4}He evaporation refrigerator, and a re-purposed, superconducting split-coil magnet. It has been used to polarize protons in irradiated NH{sub 3} at a temperature of 1 K and at fields of 2.5 and 5.0 tesla. Maximum polarizations of 55% and 95% were obtained at those fields, respectively. To satisfy the requirements of both experiments, the magnet had to be routinely rotated between angles of 0 deg, 6 deg, and 90 deg with respect to the incident electron beam.
 [1] ;  [2] ;  [1]
  1. JLAB, Newport News, VA (United States)
  2. MIT, Amherst, MA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-PHY--13-1720; DOE/OR--23177-2953
Journal ID: ISSN 1063-7796; TRN: US1400139
DOE Contract Number:
Resource Type:
Resource Relation:
Journal Name: Physics of Particles and Nuclei; Journal Volume: 45; Journal Issue: 1; Conference: Spin Physics (SPIN2012) Symposium, Dubna (Russian Federation), 17-22 Sept 2012
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC) (United States)
Country of Publication:
United States