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Laboratory simulation at microwave frequencies of auroral kilometric radiation emission mechanisms

Speirs, David and Ronald, K. and Phelps, A.D.R. and Cross, A.W. and Bingham, R. and Vorgul, I. and Cairns, R.A. and Whyte, C.G. and Robertson, C.W. and , IEEE (2005) Laboratory simulation at microwave frequencies of auroral kilometric radiation emission mechanisms. In: The Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics. IEEE, New Jersey, USA, pp. 97-98. ISBN 0780393481

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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 with respect to a cyclotron-maser type instability (Bingham and Cairns, 2000, Vorgul et al., 2004 and Speirs et al., 2004). This instability has been postulated as the mechanism responsible for auroral kilometric radiation and also non-thermal radiation from other astrophysical bodies (Bingham et al., 2001). In this paper we describe a laboratory experiment to investigate the propagation of an electron beam subject to a magnetic compression of up to a factor of 35.

Item type: Book Section
ID code: 18169
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.
Keywords: electron beams, magnetic fields, particle accelerators, particle beam dynamics, Physics
Subjects: Science > Physics
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 11 May 2010 15:23
    Last modified: 04 Oct 2012 16:20
    URI: http://strathprints.strath.ac.uk/id/eprint/18169

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