Title :
A Stack of YBCO Annuli, Thin Plate and Bulk, for Micro-NMR Spectroscopy
Author :
Seungyong Hahn ; Voccio, J. ; Dong Keun Park ; Kwang-Min Kim ; Tomita, M. ; Bascunan, J. ; Iwasa, Yukikazu
Author_Institution :
Francis Bitter Magn. Lab., Massachusetts Inst. of Technol., Cambridge, MA, USA
fDate :
6/1/2012 12:00:00 AM
Abstract :
A new annulus magnet, the latest in a series of compact magnets being developed for NMR spectroscopy applications at the MIT Francis Bitter Magnet Laboratory, was built and tested in a bath of liquid nitrogen at 77 K. The magnet, YP2800, a stack of 2800 thin YBCO plate annuli, each either 40- or 46-mm square and 0.08-mm thick with a 26-mm bore, is an upgraded version of the two earlier plate annulus magnets, YP750 (750 plates) and YP1070 (1070). This paper presents construction details and test results of YP2800. Its spatial field homogeneity and temporal stability were measured, analyzed, and compared with those of YP750 and YP1070. Also, four YBCO bulk annuli, each 26-mm i.d., 46-mm o.d., and 5.2-mm thick, were added to YP2800 and their impacts on field strength and homogeneity were investigated experimentally.
Keywords :
NMR spectroscopy; barium compounds; copper compounds; superconducting magnets; yttrium compounds; YBCO; YBCO plate annuli; YP1070; YP2800; compact magnet; liquid nitrogen; micro-NMR spectroscopy; plate annulus magnet; spatial field homogeneity; temperature 77 K; temporal stability; thin plate; Magnetic field measurement; Magnetic resonance imaging; Magnetic separation; Nuclear magnetic resonance; Solids; Superconducting magnets; Yttrium barium copper oxide; Compact annulus magnet; YBCO bulk annuli; YBCO thin plate annuli; micro-NMR spectroscopy;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2011.2178969
