Microwave generation from an electron horseshoe distribution: theory and experiment

Ronald, K. and Phelps, A.D.R. and Bingham, R. and Speirs, David and Cross, A.W. and Vorgul, I. and Cairns, R.A. and Kellett, B.J. and Whyte, C.G. and Robertson, Craig; (2006) Microwave generation from an electron horseshoe distribution: theory and experiment. In: High Energy Density and High Power RF. American Institute of Physics Conference Proceedings, 807 . American Institute of Physics, Melville, N.Y, USA, pp. 246-251. ISBN 0735402981

Abstract

When a beam of electrons encounters an increasing magnetic field along its vector of motion, conservation of the magnetic moment results in the formation of a crescent or horseshoe-shaped velocity distribution. A scenario analogous to this occurs in the terrestrial auroral zone where particles are accelerated into the polar regions of the earth's magnetic dipole and expand adiabatically in velocity space. The resultant horseshoe-shaped velocity distribution has been shown to be unstable to a cyclotron-maser type instability [1-3]. This instability has been postulated as the mechanism responsible for auroral kilometric radiation and also nonthermal radiation from other astrophysical bodies [4]. In this paper we describe both theory, simulations and a laboratory experiment to investigate the generation of microwave radiation when an electron beam is magnetically compressed by a factor of 35.

ORCID iDs

Ronald, K. ORCID: https://orcid.org/0000-0002-8585-0746

Phelps, A.D.R. ORCID: https://orcid.org/0000-0002-1100-1012

Bingham, R. ORCID: https://orcid.org/0000-0002-9843-7635

Speirs, David ORCID: https://orcid.org/0000-0001-5705-6126

Cross, A.W. ORCID: https://orcid.org/0000-0001-7672-1283

Whyte, C.G. ORCID: https://orcid.org/0000-0002-5431-2443

Robertson, Craig ORCID: https://orcid.org/0000-0002-3552-466X

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• Item metadata

  Item type:	Book Section
  ID code:	18167
  Dates:	Date Event 2006 Published
  Notes:	Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.
  Subjects:	Science > Physics
  Department:	Faculty of Science > Physics
  Depositing user:	Strathprints Administrator
  Date deposited:	11 May 2010 14:09
  Last modified:	11 Nov 2024 14:39
  Related URLs:	Publisher
  URI:	https://strathprints.strath.ac.uk/id/eprint/18167