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Electron Plasmas Cooled by Cyclotron-Cavity Resonance

A. P. Povilus, N. D. DeTal, L. T. Evans, N. Evetts, J. Fajans, W. N. Hardy, E. D. Hunter, I. Martens, F. Robicheaux, S. Shanman, C. So, X. Wang, and J. S. Wurtele
Phys. Rev. Lett. 117, 175001 – Published 21 October 2016

Abstract

We observe that high-Q electromagnetic cavity resonances increase the cyclotron cooling rate of pure electron plasmas held in a Penning-Malmberg trap when the electron cyclotron frequency, controlled by tuning the magnetic field, matches the frequency of standing wave modes in the cavity. For certain modes and trapping configurations, this can increase the cooling rate by factors of 10 or more. In this Letter, we investigate the variation of the cooling rate and equilibrium plasma temperatures over a wide range of parameters, including the plasma density, plasma position, electron number, and magnetic field.

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  • Received 12 July 2016

DOI:https://doi.org/10.1103/PhysRevLett.117.175001

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Plasma PhysicsAtomic, Molecular & Optical

Authors & Affiliations

A. P. Povilus1,2, N. D. DeTal3, L. T. Evans2, N. Evetts4, J. Fajans2,*, W. N. Hardy4, E. D. Hunter2, I. Martens5, F. Robicheaux6, S. Shanman2, C. So2, X. Wang6, and J. S. Wurtele2

  • 1Lawrence Livermore National Laboratory, Livermore, California 94550, USA
  • 2Department of Physics, University of California, Berkeley, California 94720, USA
  • 3Department of Physics and Astronomy, Beloit College, Beloit, Wisconsin 53511, USA
  • 4Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
  • 5Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
  • 6Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA

  • *Corresponding author. joel@physics.berkeley.edu

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Issue

Vol. 117, Iss. 17 — 21 October 2016

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