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Summary: MAGNETIC RESONANCE IN CHEMISTRY
Magn. Reson. Chem. 2006; 44: 255262
Published online in Wiley InterScience (www.interscience.wiley.com). DOI: 10.1002/mrc.1777
Comparison of the performance of round and
rectangular wire in small solenoids for high-field NMR
Yu Li,1 Andrew G. Webb,2 Saikat Saha,3 William W. Brey,3 Cherian Zachariah1 and
Arthur S. Edison1,3
1
Department of Biochemistry and Molecular Biology and McKnight Brain Institute, University of Florida, USA
2
Department of Bioengineering, 206 Hallowell Building, Penn State University, PA, USA
3
National High Magnetic Field Lab, Tallahassee, FL, USA
Received 1 September 2005; Revised 21 November 2005; Accepted 1 December 2005
This paper considers the effects of conductor geometry on the performance of small solenoidal coils for
high-field NMR. First, a simple analytical model is presented for investigating the effects of conductor
geometry on the current distribution in such coils. The model was used to derive optimum parameters
for coils constructed from wire with either rectangular or circular cross-sections as a function of the
length-to-diameter ratio. Second, a commercial software package utilizing full three-dimensional finite-
element solutions to Maxwell's equations was used to confirm the basic findings of the simple analytical
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