Direct ion heating effect on ignition conditions in spheromaks
- North Carolina State Univ., Raleigh, NC (United States)
Fowler et al. recently reported the possibility of Ohmic ignition in spheromaks. In the present work, this case is extended to a two fluid model that includes direct ion heating through turbulent Taylor relaxation mechanisms. The contribution to direct ion heating through this non-Ohmic magnetic dissipation and confinement scaling are quantified through comparison with the latest results from the gun driven Compact Torus eXperiment (CTX) spheromak. Good agreement is observed between experimentally measured plasma parameters and the present model predictions. Analysis of the extrapolation to an ignition class experiment indicates the possibility of reaching these conditions by gun driven Ohmic heating alone, and illustrates the merits of direct ion heating on facilitating approach to ignition. Differences between classical and direct ion heating cases are emphasized. Conservative confinement estimates are used throughout. 23 refs., 1 fig., 3 tabs.
- OSTI ID:
- 447301
- Report Number(s):
- CONF-9606116--
- Journal Information:
- Fusion Technology, Journal Name: Fusion Technology Journal Issue: 3 Vol. 30; ISSN FUSTE8; ISSN 0748-1896
- Country of Publication:
- United States
- Language:
- English
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