A laboratory experiment to investigate auroral kilometric radiation emission mechanisms

David Speirs; I. Vorgul; K. Ronald; R. Bingham; R.A. Cairns; A.D.R. Phelps; B.J. Kellett; A.W. Cross; C.G. Whyte; C. Robertson

doi:10.1017/S0022377804003459

A laboratory experiment to investigate auroral kilometric radiation emission mechanisms

David Speirs, I. Vorgul, K. Ronald, R. Bingham, R.A. Cairns, A.D.R. Phelps, B.J. Kellett, A.W. Cross, C.G. Whyte, C. Robertson

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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.

Original language	English
Pages (from-to)	665-674
Number of pages	9
Journal	Journal of Plasma Physics
Volume	71
Issue number	5
DOIs	https://doi.org/10.1017/S0022377804003459
Publication status	Published - Oct 2005

Keywords

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

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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.",

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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

Y1 - 2005/10

N2 - 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.

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

SN - 0022-3778

VL - 71

SP - 665

EP - 674

JO - Journal of Plasma Physics

JF - Journal of Plasma Physics

IS - 5

ER -

A laboratory experiment to investigate auroral kilometric radiation emission mechanisms

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