Experimental studies of nonlinear Landau damping and growth of plasma waves in a magnetic field
Description
The nonlinear Landau damping and growth of longitudinal waves in a magnetic field is studied experimentally. It is observed that a finite-amplitude cyclotron harmonic wave may decay nonresonantly into a similar, small-amplitude wave. This perturbed wave can be amplified exponentially by increasing the amplitude of the finite-amplitude wave. Similarly, an externally launched small-amplitude test wave, having the same frequency as the perturbed wave, can be amplified at a comparable rate. The spatial growth of the test wave is in agreement with the predictions of a third-order mode-coupling equation. Using a calibrated interferometer system, the nonlinear Landau damping coupling coefficients (matrix elements) are measured quantitatively, and are found to be in good agreement with theory. 15 refs., 7 figs., 1 tab
Availability note (English)
Available from NTIS, PC A03; 3 as DE88002019.
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Additional details
Publishing Information
- Imprint Pagination
- 26 p.
- Report number
- MATT--809
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 19047994
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BERNSTEIN MODE; EQUATIONS OF MOTION; EXPERIMENTAL DATA; INTERFEROMETERS; LANDAU DAMPING; MAGNETIC FIELDS; NONLINEAR PROBLEMS; PLASMA WAVES; PLASMONS; POWER; SPECTRA; THEORETICAL DATA; WAVE FORMS; WAVE PROPAGATION
- Descriptors DEC
- DAMPING; DATA; DIFFERENTIAL EQUATIONS; EQUATIONS; INFORMATION; MEASURING INSTRUMENTS; NUMERICAL DATA; OSCILLATION MODES; PARTIAL DIFFERENTIAL EQUATIONS; QUASI PARTICLES
Optional Information
- Notes
- Paper copy only, copy does not permit microfiche production.