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Autoresonant control of a pre-excited diocotron mode

Phys. Plasmas 14, 082317 (2007); doi:10.1063/1.2762131

Published 29 August 2007

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V. V. Gorgadze
Physics Department, University of California, Berkeley, California 94720, USA

L. Friedland
Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel

J. S. Wurtele
Physics Department, University of California, Berkeley, California 94720, USA
A new method for the manipulation of a pre-excited l=1 diocotron mode in a pure electron plasma in a Malmberg-Penning trap is proposed and analyzed. The plasma is passively coupled to an external oscillatory circuit with slowly varying parameters. A threshold on the coupling strength is derived beyond which the plasma is continuously self-phase-locked to the external circuit. In the case of a linearly chirped circuit frequency, this autoresonant plasma can be driven to the wall, and in the case of a chirped sinusoidal variation of the circuit frequency, the plasma can be driven to the center of the trap. Derived thresholds on the coupling strength are in good agreement with simulations. Unlike conventional feedback mechanisms, autoresonant phase locking is a consequence of the nonlinearity of the system. ©2007 American Institute of Physics
History: Received 30 March 2007; accepted 29 June 2007; published 29 August 2007
Permalink: http://link.aip.org/link/?PHPAEN/14/082317/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.35.Fp
    Plasma electrostatic waves and oscillations e.g., ion-acoustic waves
  • 52.35.Mw
    Nonlinear phenomena: plasma waves, wave propagation and other interactions including parametric effects, mode coupling, ponderomotive effects, etc
  • YEAR: 2007

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PUBLICATION DATA

ISSN:
1070-664X (print)   1089-7674 (online)
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REFERENCES (13)
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