Development of a 700 MHz low-/high- temperature superconductor nuclear magnetic resonance magnet: Test results and spatial homogeneity improvement

S. Hahn, J. Bascuñán, Haigun Lee, E. S. Bobrov, W. Kim, Y. Iwasa

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

For the first time in nuclear magnetic resonance (NMR) magnet development, a magnet configuration comprising an insert wound with high-temperature superconductor (HTS) and a background-field magnet wound with low-temperature superconductor (LTS) has been proven viable for NMR magnets. This new LTS/HTS magnet configuration opens the way for development of 1 GHz and above NMR magnets. Specifically, a 700 MHz LTS/HTS NMR magnet (LH700), consisting of a 600 MHz LTS magnet (L600) and a 100 MHz HTS insert (H100), has been designed, built, and successfully tested, and its magnetic field characteristics were measured and analyzed. A field homogeneity of 172 ppm in a cylindrical mapping volume of 17 mm diameter by 30 mm long was measured at 692 MHz and corresponding H1 NMR signal with 1.9 kHz half-width was captured. Two techniques, room-temperature and ferromagnetic shimming, were analytically examined to investigate if they would be effective for further improving spatial field homogeneity of the LH700.

Original languageEnglish
Article number026105
JournalReview of Scientific Instruments
Volume79
Issue number2
DOIs
Publication statusPublished - 2008 Mar 7

ASJC Scopus subject areas

  • Instrumentation
  • Physics and Astronomy (miscellaneous)

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