Effects of ion diamagnetic flow on shock formation in poloidally rotating tokamak plasmas

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860831· OSTI ID:6021680

Shaing, K C ^[1]; Hsu, C T ^[2]

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1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. Plasma Fusion Center, Massachusetts Institute of Technology Cambridge, Massachusetts 02139 (United States)

When the poloidal ion diamagnetic flow is of the order of the [bold E][times][bold B] drift velocity, it significantly affects the shock formation in a poloidally rotating tokamak plasma. (Here, [bold E] is the electric field and [bold B] is the magnetic field.) The poloidal density variation in both linear and shock regimes can be weakened if the poloidal ion diamagnetic flow tends to cancel the poloidal [bold E][times][bold B] flow. The magnitude of the density variation is not symmetric with respect to the direction of the [bold E][times][bold B] poloidal rotation. The resonant condition at which strong shock occurs is also modified dramatically by the diamagnetic flow. For some cases, the poloidal density variation inside the bifurcated electric field layer in the L--H transition [Phys. Rev. Lett. [bold 42], 1408 (1982)] may not be large enough to significantly modify the plasma viscosity obtained by neglecting the compressibility effects.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6021680
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 5:10; ISSN 0899-8221; ISSN PFBPEI
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350* -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
CLOSED PLASMA DEVICES
DIAMAGNETISM
MAGNETISM
PLASMA
PLASMA DENSITY
ROTATING PLASMA
SHOCK WAVES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSPORT
VISCOSITY