تقرير
The Jefferson Lab Frozen Spin Target
| العنوان: | The Jefferson Lab Frozen Spin Target |
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| المؤلفون: | Keith, C. D., Brock, J., Carlin, C., Comer, S. A., Kashy, D., McAndrew, J., Meekins, D. G., Pasyuk, E., Pierce, J. J, Seely, M. L. |
| سنة النشر: | 2012 |
| المجموعة: | Nuclear Experiment Physics (Other) |
| مصطلحات موضوعية: | Physics - Instrumentation and Detectors, Nuclear Experiment |
| الوصف: | 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. Comment: 11 pages, 12 figures, preprint submitted to Nuclear Instruments and Methods in Physics Research, Section A |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.nima.2012.04.067 |
| URL الوصول: | http://arxiv.org/abs/1204.1250 |
| رقم الأكسشن: | edsarx.1204.1250 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.nima.2012.04.067 |
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