Amplitude Scaling of Asymmetry-Induced Transport
Abstract
Our initial experiments on asymmetry-induced transport in non-neutral plasmas found the radial particle flux at small radii to be proportional to Phi (sup 2)(sub a) where Phi (sub a) is the applied asymmetry amplitude. Other researchers, however, using the global expansion rate as a measure of the transport, have observed a Phi(sup 2)(sub a) scaling when the rigidity (the ratio of the axial bounce frequency to the azimuthal rotation frequency) is in the range one to ten. In an effort to resolve this discrepancy, we have extended our measurements to different radii and asymmetry frequencies. Although the results to date are generally in agreement with those previously reported Phi(sup 2)(sub a) scaling at low asymmetry amplitudes falling off to a weaker scaling at higher amplitudes), we have observed some cases where the low amplitude scaling is closer to Phi(sup 1)(sub a). Both the Phi(sup 2)(sub a) and Phi(sup 1)(sub a) cases, however, have rigidities less than ten. Instead, we find that the Phi(sup 1)(sub a) cases are characterized by an induced flux that is comparable in magnitude but opposite in sign to the background flux. This suggests that the mixing of applied and background asymmetries plays an important role in determining the amplitude scaling of this transport.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 24, 2002
- Accession Number
- ADP012534
Entities
People
- B. Carrillo
- D. L. Eggleston
Organizations
- Occidental College