Atomic physics effects on tokamak edge drift-tearing modes

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

DOI:https://doi.org/10.1063/1.860660· OSTI ID:6241522

Hahm, T S ^[1]

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1. Princeton University, Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)

The effects of ionization and charge exchange on the linear stability of drift-tearing modes are analytically investigated. In particular, the linear instability threshold [Delta][sup Th], produced by ion sound wave coupling [Phys. Rev. Lett. [bold 40], 1500 (1978)] is modified. In the strongly collisional regime, the ionization breaks up the near cancellation of the perturbed electric field and the pressure gradient along the magnetic field, and increases the threshold. In the semicollisional regime, both ionization and charge exchange act as drag on the ion parallel velocity [Phys. Fluids B [bold 4], 2567 (1992)], and consequently decrease the threshold by reducing the effectiveness of ion sound wave propagation.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6241522
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 5:9; ISSN PFBPEI; ISSN 0899-8221
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
CHARGE EXCHANGE
CLOSED PLASMA DEVICES
COLLISIONAL PLASMA
DISPERSION RELATIONS
DRIFT INSTABILITY
FLUID MECHANICS
HYDRODYNAMICS
INSTABILITY
INSTABILITY GROWTH RATES
ION ACOUSTIC WAVES
ION WAVES
IONIZATION
MAGNETOHYDRODYNAMICS
MECHANICS
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA MICROINSTABILITIES
PLASMA WAVES
TEARING INSTABILITY
THERMONUCLEAR DEVICES
TOKAMAK DEVICES