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35T Series-Connected Hybrid Development

35T Series-Connected Hybrid Development. Zhehong Gan. Tallahassee, November 12, 2004. Overview. 35T SCH Magnet High Field NMR Activities (NMR) toward 35T. 35T (1.49GHz) 40-mm clear bore 1 ppm over 10mm diameter DSV resistive (ferro) shim high L/R ratio.

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35T Series-Connected Hybrid Development

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  1. 35T Series-Connected Hybrid Development Zhehong Gan Tallahassee, November 12, 2004

  2. Overview • 35T SCH Magnet • High Field NMR • Activities (NMR) toward 35T

  3. 35T (1.49GHz) • 40-mm clear bore • 1 ppm over 10mm diameter DSV • resistive (ferro) shim • high L/R ratio

  4. Very high field NMR Resolution of quadrupolar nuclei Z. Gan. P. Gor’kov, T. Cross, A. Samoson, (NICBP, Estonia) D. Massiot (CNRS, Orleans) JACS, 124, (2002) 5634 9Al2O3+2B2O3

  5. Very high field NMR Resolution of Quadrupolar Nuclei 9.4T 4mm 12kHz MAS • Boltzman factor B0 • Frequency B0 • Line narrowing B0 • Resolved spinning sideband • ~20 gain in sensitivity from 9.4 to 19.6T (~400 in time) 19.6T 2.75mm 20kHz MAS methyl a-D-glucopyranoside (6-17O) P. Grandinetti (Ohio State Univ), Z. Gan (NHMFL)

  6. Quadrupolar nuclei (biological solid) Leu10-17O gramicidin static spectra at 900MHz J. Hu, W. Brey, P. Gor’kov E. Chekmenev, T. Cross methyl a-D-glucopyranoside (6-17O)

  7. Spin dynamics Y. Lin, W. Brey, W. Warren

  8. Field homogeneity (40T Hybrid)

  9. Ferroshim at 25T (Keck)

  10. Field homogeneity and HRMAS (Keck)

  11. Resistive magnet: field fluctuation

  12. Flux stablization (Keck) Figure 1. Spin-echo phase stability as a function of spin-delay t with flux stablizer on and off.

  13. Henpec(HEtero-Nuclear PhasE Corrected spectroscopy)

  14. 1.065GHz 1H spectrum with Henpec

  15. Ultrafast single-scan NMR

  16. Ultrafast NMR at 25T(Keck)

  17. What’s next • Magnet design • Active shim • Field stablization • Flux stablizer • Field/Frequency Lock • Facility upgrade • Water temperature control • Running time (tank capacity) • Separated DC power supply • Very High Field NMR • Manpower

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