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

Conference · Wed Jan 01 00:00:00 EST 2014 · Physics of Particles and Nuclei

DOI:https://doi.org/10.1134/S1063779614010808· OSTI ID:1114185

Pierce, Joshua J. ^[1]; Maxwell, James D. ^[2]; Keith, Christopher D. ^[1]

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1. JLAB, Newport News, VA (United States)
2. MIT, Amherst, MA (United States)

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.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1114185
• Report Number(s): JLAB-PHY-13-1720; DOE/OR-23177-2953; TRN: US1400139
• Journal Information: Physics of Particles and Nuclei, Vol. 45, Issue 1; Conference: Spin Physics (SPIN2012) Symposium, Dubna (Russian Federation), 17-22 Sept 2012; ISSN 1063-7796
• Country of Publication: United States
• Language: English

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