Physics – Instrumentation and Detectors
Scientific paper
2012-04-05
Physics
Instrumentation and Detectors
11 pages, 12 figures, preprint submitted to Nuclear Instruments and Methods in Physics Research, Section A
Scientific paper
A frozen spin polarized target, constructed at Jefferson Lab for use inside a large acceptance spectrometer, is described. The target has been utilized for photoproduction measurements with polarized tagged photons of both longitudinal and circular polarization. Protons in TEMPO-doped butanol were dynamically polarized to approximately 90% outside the spectrometer at 5 T and 200--300 mK. Photoproduction data were acquired with the target inside the spectrometer at a frozen-spin temperature of approximately 30 mK with the polarization maintained by a thin, superconducting coil installed inside the target cryostat. A 0.56 T solenoid was used for longitudinal target polarization and a 0.50 T dipole for transverse polarization. Spin-lattice relaxation times as high as 4000 hours were observed. We also report polarization results for deuterated propanediol doped with the trityl radical OX063.
Brock Jeffrey
Carlin C.
Comer S. A.
Kashy D.
Keith C. D.
No associations
LandOfFree
The Jefferson Lab Frozen Spin Target does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Jefferson Lab Frozen Spin Target, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Jefferson Lab Frozen Spin Target will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-212959