Radio-frequency wave interchange stability experiments below the ion cyclotron frequency

Journal Article · Tue Aug 01 04:00:00 EDT 1989 · Phys Fluids B; (United States)

DOI:https://doi.org/10.1063/1.858948· OSTI ID:5957755

Browning, J J; Hershkowitz, N; Intrator, T; Majeski, R; Meassick, S

It has been demonstrated in the Phaedrus-B tandem mirror (Phys. Fluids /bold 31/, 714 (1988)) that radio-frequency (rf) waves applied below the ion cyclotron frequency (/omega///Omega//sub /ital i// /approx/0.75) can stabilize a mirror plasma against the interchange instability. Results presented here demonstrate stabilization over a range of frequencies (0.65/le//omega///Omega//sub /ital i///le/0.8) with the /ital m//sub MHD/ =/minus/1 instability stabilized and higher-order (/vert bar//ital m//sub MHD//vert bar//ge/2) low-amplitude modes present. Radial profiles of the rf magnetic fields at a number of axial locations as well as parallel wavenumber measurements indicate /ital m//sub rf/ =/minus/1 slow shear Alfven wave excitation over this frequency range. Measurements at frequencies below 0.75/Omega//sub /ital i// indicate attenuation of rf waves by gas baffles and a gas box.

• Research Organization: Department of Nuclear Engineering and Engineering Physics, University of Wisconsin, Madison, Wisconsin 53706(US)
• OSTI ID: 5957755
• Journal Information: Phys Fluids B; (United States), Journal Name: Phys Fluids B; (United States) Vol. 1:8; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
ALFVEN WAVES
AMPLITUDES
ATTENUATION
BUBBLES
CHARGED PARTICLES
CYCLOTRON FREQUENCY
ELECTROMAGNETIC RADIATION
FLUIDS
FLUTE INSTABILITY
GASES
HYDROMAGNETIC WAVES
INSTABILITY
IONS
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RADIATIONS
RADIOWAVE RADIATION
TANDEM MIRRORS
THERMONUCLEAR DEVICES