EXPERIMENTS ON SUPPRESSION OF ION-ION INSTABILITY BY RF PUMPS

Citation
Y. Saitou et al., EXPERIMENTS ON SUPPRESSION OF ION-ION INSTABILITY BY RF PUMPS, Plasma physics and controlled fusion, 35(12), 1993, pp. 1755-1764
Citations number
27
Categorie Soggetti
Phsycs, Fluid & Plasmas
ISSN journal
07413335
Volume
35
Issue
12
Year of publication
1993
Pages
1755 - 1764
Database
ISI
SICI code
0741-3335(1993)35:12<1755:EOSOII>2.0.ZU;2-O
Abstract
The ion-ion instability is excited in an ion beam plasma system. It is found that the ion-ion instability is effectively suppressed by RF pu mps with frequencies dose to or higher than the peak frequency of the instability. These results are compared with the prediction of the Van der Pol equation to clarify the physical mechanism of the suppression of the ion-ion instability by the RF pumps. It is shown that the supp ression mechanism around f(ex)/f(ii) similar or equal to 1 is synchron ous suppression whose tendency is similar to the prediction of Van der Pol equation, and the mechanism at f(ex)/f(ii) > 1 is due to the pert urbation of the ion beam energy caused by the RF pumps.