TY - JOUR
T1 - Development of high superconductor fraction Bi2 Sr 2CaCu2Ox/Ag wire for MRI
AU - Nachtrab, W. T.
AU - Renaud, C. V.
AU - Wong, T.
AU - Liu, X. T.
AU - Shen, T. M.
AU - Trociewitz, U. P.
AU - Schwartz, J.
N1 - Funding Information:
Manuscript received August 25, 2007. This work was supported in part by the NIH-National Cancer Institute under Grant 4R44CA110117-03. W. T. Nachtrab, C. V. Renaud, Jr., and T. Wong are with Supercon, Inc., Shrewsbury, MA 01545 USA (e-mail: [email protected]). X. T. Liu, T. M. Shen, U. P. Trociewitz, and J. Schwartz are with the National High Magnetic Field Laboratory, Tallahassee, FL 32310 USA and the College of Engineering, FAMU-FSU, FL USA (e-mail: [email protected]). Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2008.920630
PY - 2008/6
Y1 - 2008/6
N2 - B12212 round multifilament wire has good potential for MRI systems designed to operate at 20 K and produce fields greater than 1.5 T. However, B12212 conductor is expensive largely due to the costs associated with materials and fabrication. To reduce the cost, we are investigating single restack designs. This approach reduces the silver fraction. It also reduces the amount of processing needed to make the conductor. However, a single restack limits the minimum filament diameter that can be achieved since the strain space is more limited. In this work we evaluated 4 conductor configurations to determine the effects of fill-factor, filament diameter, and s/d on Je and n value. It was found that a reduction in filament size has a greater effect on J e and n value than a corresponding increase in fill-factor. Some guidelines for optimization of conductor design are developed.
AB - B12212 round multifilament wire has good potential for MRI systems designed to operate at 20 K and produce fields greater than 1.5 T. However, B12212 conductor is expensive largely due to the costs associated with materials and fabrication. To reduce the cost, we are investigating single restack designs. This approach reduces the silver fraction. It also reduces the amount of processing needed to make the conductor. However, a single restack limits the minimum filament diameter that can be achieved since the strain space is more limited. In this work we evaluated 4 conductor configurations to determine the effects of fill-factor, filament diameter, and s/d on Je and n value. It was found that a reduction in filament size has a greater effect on J e and n value than a corresponding increase in fill-factor. Some guidelines for optimization of conductor design are developed.
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U2 - 10.1109/TASC.2008.920630
DO - 10.1109/TASC.2008.920630
M3 - Article
AN - SCOPUS:45149125892
SN - 1051-8223
VL - 18
SP - 1184
EP - 1187
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2
M1 - 4515943
ER -