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The E2 N[yields][Delta] transition from polarized Compton scattering

Description: Short communication.
Date: January 1, 1993
Creator: Sandorfi, A.M.; Caracappa, A.; Kistner, O.C.; Thorn, C.E. (Brookhaven National Lab., Upton, NY (United States)); Miceli, L. (Brookhaven National Lab., Upton, NY (United States) South Carolina Univ., Columbia, SC (United States). Dept. of Physics); Giordano, G. et al.
Partner: UNT Libraries Government Documents Department

A portable cryostat for the cold transfer of polarized solid HD targets: HDice-I

Description: A device has been developed with moveable liquid nitrogen and liquid helium volumes that is capable of reaching over two meters into the coldest regions of a cryostat or dilution refrigerator and reliably extracting or installing a target of solid, polarized hydrogen deuteride (HD). This Transfer Cryostat incorporates a cylindrical neodymium rare-earth magnet that is configured as a Halbach dipole, which is maintained at 77 K and produces a 0.1 T field around the HD target. Multiple layers provide a hermetic 77 K-shield as the device is used to maintain a target at 2 K during a transfer between cryostats. Tests with frozen-spin HD show negligible polarization loss for either H or D over typical transfer periods. Multiple target transfers with this apparatus have shown an overall reliability of about 95% per transfer, which is a significant improvement over earlier versions of the device.
Date: February 1, 2014
Creator: Bass, Christopher D.; Sandorfi, Andy M.; Bade, C.; Blecher, M.; Caracappa, A.; D'Angelo, A. et al.
Partner: UNT Libraries Government Documents Department