Measurements of sideband mode-coupling effects and linear MHD growth rates associated with the ponderomotive force
Thesis/Dissertation
·
OSTI ID:6993792
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
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640301 -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
656000* -- Condensed Matter Physics
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALCULATION METHODS
CONTROL
CYCLOTRON RESONANCE
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
FLUID MECHANICS
FLUTE INSTABILITY
HYDRODYNAMICS
INFORMATION
INSTABILITY
ION CYCLOTRON-RESONANCE
MAGNETOHYDRODYNAMICS
MEASURING INSTRUMENTS
MEASURING METHODS
MECHANICS
MODE CONTROL
NUMERICAL DATA
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PONDEROMOTIVE FORCE
RESONANCE
STABILIZATION
Molecular & Chemical Physics-- Beams & their Reactions
640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
656000* -- Condensed Matter Physics
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALCULATION METHODS
CONTROL
CYCLOTRON RESONANCE
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
FLUID MECHANICS
FLUTE INSTABILITY
HYDRODYNAMICS
INFORMATION
INSTABILITY
ION CYCLOTRON-RESONANCE
MAGNETOHYDRODYNAMICS
MEASURING INSTRUMENTS
MEASURING METHODS
MECHANICS
MODE CONTROL
NUMERICAL DATA
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PONDEROMOTIVE FORCE
RESONANCE
STABILIZATION