A cryostat to hold frozen-spin polarized HD targets in CLAS: HDice-II

Lowry, M.M. et al. (2016) A cryostat to hold frozen-spin polarized HD targets in CLAS: HDice-II. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 815, pp. 31-41. (doi:10.1016/j.nima.2015.12.063)

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Abstract

The design, fabrication, operation, and performance of a 3/4He dilution refrigerator and superconducting magnet system for holding a frozen-spin polarized hydrogen deuteride target in the Jefferson Laboratory CLAS detector during photon beam running is reported. The device operates both vertically (for target loading) and horizontally (for target bombardment). The device proves capable of maintaining a base temperature of 50 mK and a holding field of 1 T for extended periods. These characteristics enabled multi-month polarization lifetimes for frozen spin HD targets having proton polarization of up to 50% and deuteron up to 27%.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Sokhan, Dr Daria
Authors: Lowry, M.M., Bass, C.D., D׳Angelo, A., Deur, A., Dezern, G., Hanretty, C., Ho, D., Kageya, T., Kashy, D., Khandaker, M., Laine, V., O׳Connell, T., Pastor, O., Peng, P., Sandorfi, A.M., Sokhan, D., Wei, X., and Zarecky, M.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Publisher:Elsevier
ISSN:0168-9002
ISSN (Online):1872-9576
Published Online:07 January 2016

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