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Title: Spatiotemporal synchronization of drift waves in a magnetron sputtering plasma

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.
Authors:
; ; ; ; ; ;  [1] ;  [2]
  1. Consorzio RFX, Padova (Italy)
  2. Institute of Plasma Physics AS CR, Prague (Czech Republic)
Publication Date:
OSTI Identifier:
22299668
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 10; Other Information: (c) 2014 EURATOM; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CONTROL; CURRENTS; ELECTRODES; ELECTRONS; ENERGY TRANSFER; FLUCTUATIONS; KHZ RANGE 01-100; MAGNETRONS; PERIODICITY; PERTURBATION THEORY; PLASMA; SYNCHRONIZATION; WAVE PROPAGATION; WAVELENGTHS