Experiment and theory of a drift wave in the levitated octupole
Description
A very coherent 30 kHz drift wave is observed in the Levitated Toroidal Octupole at the University of Wisconsin - Madison. The density and floating potential fluctuations have a well-defined spatial structure in the poloidal magnetic field. Radially the wave has a standing wave structure with amplitude peaked in regions of locally bad magnetic curvature. Poloidally the wave has a standing wave structure with odd symmetry; nodes are located in the regions of locally good magnetic curvature. The wave propagates toroidally in the electron diamagnetic drift direction with a wavelength of 20 centimeters. No changes occur in the wave structure as the plasma is varied over three orders of magnitude in density and beta
Availability note (English)
MF available from INIS under the Report Number; Available from NTIS., PC A08/MF A01 as DE82022211.
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Additional details
Publishing Information
- Imprint Pagination
- 155 p.
- Report number
- DOE/ET/53051--45
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 14734753
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- BETA RATIO; DRIFT INSTABILITY; LEVITATION; MATHEMATICAL MODELS; OCTUPOLAR CONFIGURATIONS; PLASMA DENSITY
- Descriptors DEC
- CLOSED CONFIGURATIONS; INSTABILITY; MAGNETIC FIELD CONFIGURATIONS; MULTIPOLAR CONFIGURATIONS; PLASMA INSTABILITY; PLASMA MICROINSTABILITIES