Measurements of sideband mode-coupling effects and linear MHD growth rates associated with the ponderomotive force

Miscellaneous · Fri Jan 01 00:00:00 EST 1988

OSTI ID:6993792

Meassick, S

Measurements of the interactions of rf waves in the ion cyclotron range of frequencies (ICRF) with flute interchange modes are presented. Interactions between the applied l = +1 rf wave and an m = {minus}1 flute mode give rise to sidebands above and below the rf frequency with mode numbers of l = 0 and l = +2 respectively. The contribution of the sideband terms to perturbed energy are shown to cancel 40% of the direct ponderomotive contribution for w/w{sub ci} = 1.25. This is less then the 90% predicted by self-consistent theories of the ponderomotive force for an applied l = +1 rf wave above the ion cyclotron frequency with a large separation between the plasma and the vacuum vessel. Measurements of the linear growth and decay rate of the flute instability in the presence of rf are presented. These measurements allow a determination of the net stabilizing force on the plasma. The measured growth rate is in good agreement with that calculated by considering only the curvature driven instability and the ponderomotive force.

• Research Organization: William Beaumont Hospital, Royal Oak, MI (USA)
• OSTI ID: 6993792
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
MAGNETOHYDRODYNAMICS
EXPERIMENTAL DATA
PLASMA
CALCULATION METHODS
DATA ANALYSIS
FLUTE INSTABILITY
ION CYCLOTRON-RESONANCE
MEASURING INSTRUMENTS
MEASURING METHODS
MODE CONTROL
PONDEROMOTIVE FORCE
STABILIZATION
CONTROL
CYCLOTRON RESONANCE
DATA
FLUID MECHANICS
HYDRODYNAMICS
INFORMATION
INSTABILITY
MECHANICS
NUMERICAL DATA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RESONANCE
656000* - Condensed Matter Physics
640301 - Atomic
Molecular & Chemical Physics- Beams & their Reactions
640304 - Atomic
Molecular & Chemical Physics- Collision Phenomena