Evaluation of Possible Nuclear Magnetic Resonance Diagnostic Techniques for Tokamak Experiments

Zweben, S. J. ; Kornack, T. W. ; Majeski, D. ; Schilling, G. ; Skinner, C. H. ; Wilson, R.

Princeton University. Plasma Physics Laboratory.

关键词: Tritium Diagnostics;    Hydrogen Isotopes;    Rf Heating;    70 Plasma Physics And Fusion Technology;    Spin;   

DOI  :  10.2172/808381
RP-ID  :  PPPL-3734
RP-ID  :  AC02-76CH03073
RP-ID  :  808381

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来源: UNT Digital Library

【 摘 要 】

Potential applications of nuclear magnetic resonance (NMR) diagnostic techniques to tokamak experiments are evaluated. NMR frequencies for hydrogen isotopes and low-Z nuclei in such experiments are in the frequency range approximately equal to 20-200 MHz, so existing RF [radio-frequency] antennas could be used to rotate the spin polarization and to make the NMR measurements. Our tentative conclusion is that such measurements are possible if highly spin polarized H or (superscript)3He gas sources (which exist) are used to fuel these plasmas. In addition, NMR measurements of the surface layers of the first wall (without plasma) may also be possible, e.g., to evaluate the inventory of tritium inside the vessel.