Spherical stellarator approach
- Univ. of Wisconsin, Madison, WI (United States)
Low aspect ratio (LAR) tokamaks with A = 1.5--2.5, or ultra low aspect ratio (ULAR) tokamaks, with A = 1.05--1.5 have attracted recently a lot of attention because of the first promising results reported from START, and CDX-U. In addition to high {beta} obtained in ST, the low plasma disruptivity has been reported. Because of this initial success, the ST program is quickly extending. In contrast to LAR approach, stellarators normally feature large aspect ratios of A {ge} 10. The lowest aspect ratio stellarators ever built are CHS and CAT which have A {approx} 5. Even stellarators with A {approx} 7.5 such as ATF are called the low aspect ratio stellarators. In this report, the authors present the results on the novel ULAR stellarator system with A = 1.05--2, that can be called a spherical stellarator (SS) in analogy with the ST concept. Coil configuration of SS features the central stack and differs from that of ST by inclination of external parts of the toroidal field coils. Results of calculations via UBFIELD, VMEC and some other standard codes, confirming advantages of SS systems, is discussed.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-88ER53263; FG02-88ER53264
- OSTI ID:
- 428018
- Report Number(s):
- CONF-960634-; TRN: IM9708%%347
- Resource Relation:
- Conference: 1996 IEEE international conference on plasma science, Boston, MA (United States), 3-5 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of IEEE conference record -- Abstracts: 1996 IEEE international conference on plasma science; PB: 324 p.
- Country of Publication:
- United States
- Language:
- English
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