Atomic physics effects on tokamak edge drift-tearing modes

Technical Report · Mon Mar 01 04:00:00 EST 1993

DOI:https://doi.org/10.2172/6607840· OSTI ID:6607840

Hahm, T S

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 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 semi-collisional regime, both ionization and charge exchange act as drag on the ion parallel velocity, and consequently decrease the threshold by reducing the effectiveness of ion sound wave propagation.

• Research Organization: Princeton Univ., NJ (United States). Plasma Physics Lab.
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6607840
• Report Number(s): PPPL-2877; ON: DE93011503
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
700380 -- Elementary & Classical Processes in Plasmas-- (1992-)
CHARGE EXCHANGE
CLOSED PLASMA DEVICES
DISPERSION RELATIONS
DRIFT INSTABILITY
EQUILIBRIUM
INSTABILITY
IONIZATION
MAGNETIC FIELDS
MHD EQUILIBRIUM
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA MICROINSTABILITIES
PRESSURE GRADIENTS
SHEAR
SOUND WAVES
TEARING INSTABILITY
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
WAVE PROPAGATION