A laboratory experiment to investigate auroral kilometric radiation emission mechanisms

Research output: Contribution to journalArticle

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Abstract

If an initially mainly rectilinear electron beam is subject to significant magnetic compression, the conservation of the magnetic moment results in the ultimate formation of a horseshoe distribution in phase space. A similar situation occurs where particles are accelerated into the auroral region of the Earth's magnetic dipole. Such a distribution has been shown to be unstable to a cyclotron resonance maser type of instability and it has been postulated that this may be the mechanism required to explain the production in these regions of auroral kilometric radiation (AKR) and also possibly radiation from other astrophysical objects such as stars with a suitable magnetic field configuration. In this paper we describe a laboratory experiment to investigate the evolution of an electron beam subject to a magnetic compression of up to a factor of 30.
LanguageEnglish
Pages665-674
Number of pages9
JournalJournal of Plasma Physics
Volume71
Issue number5
DOIs
Publication statusPublished - Oct 2005

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magnetic compression
electron beams
magnetic field configurations
radiation
masers
cyclotron resonance
magnetic dipoles
conservation
astrophysics
magnetic moments
stars

Keywords

  • rectilinear electron beam
  • magnetic compression
  • cyclotron resonance maser
  • auroral kilometric radiation
  • plasma

Cite this

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title = "A laboratory experiment to investigate auroral kilometric radiation emission mechanisms",
abstract = "If an initially mainly rectilinear electron beam is subject to significant magnetic compression, the conservation of the magnetic moment results in the ultimate formation of a horseshoe distribution in phase space. A similar situation occurs where particles are accelerated into the auroral region of the Earth's magnetic dipole. Such a distribution has been shown to be unstable to a cyclotron resonance maser type of instability and it has been postulated that this may be the mechanism required to explain the production in these regions of auroral kilometric radiation (AKR) and also possibly radiation from other astrophysical objects such as stars with a suitable magnetic field configuration. In this paper we describe a laboratory experiment to investigate the evolution of an electron beam subject to a magnetic compression of up to a factor of 30.",
keywords = "rectilinear electron beam, magnetic compression, cyclotron resonance maser, auroral kilometric radiation, plasma",
author = "David Speirs and I. Vorgul and K. Ronald and R. Bingham and R.A. Cairns and A.D.R. Phelps and B.J. Kellett and A.W. Cross and C.G. Whyte and C. Robertson",
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A laboratory experiment to investigate auroral kilometric radiation emission mechanisms. / Speirs, David; Vorgul, I.; Ronald, K.; Bingham, R.; Cairns, R.A.; Phelps, A.D.R.; Kellett, B.J.; Cross, A.W.; Whyte, C.G.; Robertson, C.

In: Journal of Plasma Physics, Vol. 71, No. 5, 10.2005, p. 665-674.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A laboratory experiment to investigate auroral kilometric radiation emission mechanisms

AU - Speirs, David

AU - Vorgul, I.

AU - Ronald, K.

AU - Bingham, R.

AU - Cairns, R.A.

AU - Phelps, A.D.R.

AU - Kellett, B.J.

AU - Cross, A.W.

AU - Whyte, C.G.

AU - Robertson, C.

PY - 2005/10

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AB - If an initially mainly rectilinear electron beam is subject to significant magnetic compression, the conservation of the magnetic moment results in the ultimate formation of a horseshoe distribution in phase space. A similar situation occurs where particles are accelerated into the auroral region of the Earth's magnetic dipole. Such a distribution has been shown to be unstable to a cyclotron resonance maser type of instability and it has been postulated that this may be the mechanism required to explain the production in these regions of auroral kilometric radiation (AKR) and also possibly radiation from other astrophysical objects such as stars with a suitable magnetic field configuration. In this paper we describe a laboratory experiment to investigate the evolution of an electron beam subject to a magnetic compression of up to a factor of 30.

KW - rectilinear electron beam

KW - magnetic compression

KW - cyclotron resonance maser

KW - auroral kilometric radiation

KW - plasma

UR - http://dx.doi.org/10.1017/S0022377804003459

U2 - 10.1017/S0022377804003459

DO - 10.1017/S0022377804003459

M3 - Article

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T2 - Journal of Plasma Physics

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SN - 0022-3778

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ER -