Effects of enhanced elongation and paramagnetism on the parameter space of the ignition spherical torus
The Ignition Spherical Torus (IST) is a small aspect ratio device retaining only indispensable components along the major axis of a tokamak plasma, such as a cooled, normal conductor producing a toroidal magnetic field. The IST is expected to be a cost-effective approach to ignition by taking advantage of low field, large natural plasma elongation, high plasma current, high beta, and tokamak confinement. These result in compact, high-performance devices with relatively simple magnetic systems as compared with ignition tokamaks of larger aspect ratio. The plasma enhancement of the toroidal field on axis, or plasma paramagnetism, is significant in the IST. The use of this plasma-enhanced field in conventional tokamak beta and density limits leads to increased plasma pressure and performance and therefore smaller device size for a given ignition margin.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Grumman Aerospace Corp., Bethpage, NY (USA); Tennessee Univ., Knoxville (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7043937
- Report Number(s):
- CONF-851102-115; ON: DE87002192
- Resource Relation:
- Conference: 11. symposium on engineering problems in fusion research, Austin, TX, USA, 18 Nov 1985; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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