Spatiotemporal synchronization of drift waves in a magnetron sputtering plasma

0436272 - ÚFP 2015 RIV US eng J - Journal Article
Martines, E. - Zuin, M. - Cavazzana, R. - Adámek, Jiří - Antoni, V. - Serianni, G. - Spolaore, M. - Vianello, N.
Spatiotemporal synchronization of drift waves in a magnetron sputtering plasma.
Physics of Plasmas. Roč. 21, č. 10 (2014), s. 102309-102309. ISSN 1070-664X. E-ISSN 1089-7674
Institutional support: RVO:61389021
Keywords : Drift waves * Magnetron sputtering plasma * Spatiotemporal synchronization
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 2.142, year: 2014
http://dx.doi.org/10.1063/1.4898693

A feedforward scheme is applied for drift waves control in a magnetized magnetron sputtering plasma. A system of driven electrodes collecting electron current in a limited region of the explored plasma is used to interact with unstable drift waves. Drift waves actually appear as electrostatic modes characterized by discrete wavelengths of the order of few centimeters and frequencies of about 100 kHz. The effect of external quasi-periodic both in time and space travelling perturbations is studied. Particular emphasis is given to the role played by the phase relation between the natural and the imposed fluctuations. It is observed that it is possible by means of localized electrodes collecting currents which are negligible with respect to those flowing in the plasma to transfer energy to one single mode and to reduce that associated to the others. Due to the weakness of the external action only partial control has been achieved.
Permanent Link: http://hdl.handle.net/11104/0240078