Bifurcation and Relaxation of Radial Electric Field in Enhanced Reversed Shear Tokamak Plasmas

Journal Article · Sun Oct 31 23:00:00 EST 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.83.3840· OSTI ID:690754

Shaing, K C; Aydemir, A Y ^[1]; Hiwatari, R; Ogawa, Y ^[2]; Houlberg, W A ^[3]; Zarnstorff, M C ^[4]

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1. Institute for Fusion Studies, The University of Texas, Austin, Texas 78712 (United States)
2. School of Engineering, University of Tokyo, Tokyo (Japan)
3. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
4. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)

It is shown that toroidal magnetic field ripple induced thermal and fast ion loss can drive the radial electric field to bifurcate over the local maximum of the parallel (or poloidal) viscosity. The subsequent plasma profile evolution reduces the hot particle density and relaxes the radial electric field. This behavior is consistent with the experimental observations in enhanced reversed shear mode in tokamaks. {copyright} {ital 1999} {ital The American Physical Society }

• OSTI ID: 690754
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 83; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BIFURCATION
ELECTRIC FIELDS
ION DENSITY
PLASMA CONFINEMENT
RELAXATION
TOKAMAK DEVICES
VISCOSITY