High-mode-number ballooning modes in a heliotron/torsatron system [electronic resource] : 1, Local magnetic shear
- Washington, D.C. : United States. Dept. of Defense, 1996.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- 36 pages : digital, PDF file
- Additional Creators:
- University of Texas at Austin, United States. Department of Defense, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- The characteristics of the local magnetic shear, a quantity associated with high-mode-number ballooning mode stability, are considered in heliotron/torsatron devices that have a large Shafranov shift. The local magnetic shear is shown to vanish even in the stellarator-like region in which the global magnetic shear is positive. The reason for this is that the degree of the local compression of the poloidal magnetic field on the outer side of the torus, which maintains the toroidal force balance, is reduced in the stellarator-like region of global magnetic shear because the global rotational transform in heliotron/torsatron systems is a radially increasing function. This vanishing of the local magnetic shear is a universal property in heliotron/torsatron systems with a large Shafranov shift since it results from toroidal force balance in the stellarator-like global shear regime that is inherent to such systems.
- Report Numbers:
- E 1.99:ifsr--749
- Other Subject(s):
- Published through SciTech Connect.
": Grant F49620-95-1-0529"
- Funding Information:
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