Microwave generation from an electron horseshoe distribution: Theory and experiment

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

doi:10.1063/1.2158784

Microwave generation from an electron horseshoe distribution: Theory and experiment

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

Applied Mathematics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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.

Original language	English
Title of host publication	High Energy Density and High Power RF
Editors	DK Abe, GS Nusinovich
Place of Publication	Melville, NY
Publisher	American Institute of Physics
Pages	246-251
Number of pages	6
ISBN (Print)	0-7354-0298-1
DOIs	https://doi.org/10.1063/1.2158784
Publication status	Published - 2006
Event	7th Workshop on High Energy Density and High Power RF - Kalamata Duration: 13 Jun 2005 → 17 Jun 2005

Publication series

Name	AIP Conference Proceedings
Volume	807
ISSN (Print)	0094-243x
ISSN (Electronic)	1551-7616

Conference

Conference	7th Workshop on High Energy Density and High Power RF
City	Kalamata
Period	13/06/05 → 17/06/05

Access to Document

10.1063/1.2158784

Beam Driven Instabilities in Magnetized: Beam diven instabilities in magnetized plasmas
Cairns, R. A. (PI)
EPSRC
1/01/06 → 31/12/08
Project: Standard

Cite this

Ronald, K., Phelps, A. D. R., Bingham, R., Speirs, D. C., Cross, A. W., Vorgul, I., Cairns, R. A., Kellett, B. J., Whyte, C. G., & Robertson, C. W. (2006). Microwave generation from an electron horseshoe distribution: Theory and experiment. In DK. Abe, & GS. Nusinovich (Eds.), High Energy Density and High Power RF (pp. 246-251). (AIP Conference Proceedings; Vol. 807). American Institute of Physics. https://doi.org/10.1063/1.2158784

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title = "Microwave generation from an electron horseshoe distribution: Theory and experiment",

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.",

author = "K Ronald and Phelps, {A D R} and R Bingham and Speirs, {D C} and Cross, {A W} and I Vorgul and Cairns, {R A} and Kellett, {B J} and Whyte, {C G} and Robertson, {C W}",

year = "2006",

doi = "10.1063/1.2158784",

language = "English",

isbn = "0-7354-0298-1",

series = "AIP Conference Proceedings",

publisher = "American Institute of Physics",

pages = "246--251",

editor = "DK Abe and GS Nusinovich",

booktitle = "High Energy Density and High Power RF",

address = "United States",

note = "7th Workshop on High Energy Density and High Power RF ; Conference date: 13-06-2005 Through 17-06-2005",

}

Ronald, K, Phelps, ADR, Bingham, R, Speirs, DC, Cross, AW, Vorgul, I, Cairns, RA, Kellett, BJ, Whyte, CG & Robertson, CW 2006, Microwave generation from an electron horseshoe distribution: Theory and experiment. in DK Abe & GS Nusinovich (eds), High Energy Density and High Power RF. AIP Conference Proceedings, vol. 807, American Institute of Physics, Melville, NY, pp. 246-251, 7th Workshop on High Energy Density and High Power RF, Kalamata, 13/06/05. https://doi.org/10.1063/1.2158784

Microwave generation from an electron horseshoe distribution: Theory and experiment. / Ronald, K ; Phelps, A D R ; Bingham, R et al.
High Energy Density and High Power RF. ed. / DK Abe; GS Nusinovich. Melville, NY: American Institute of Physics, 2006. p. 246-251 (AIP Conference Proceedings; Vol. 807).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Microwave generation from an electron horseshoe distribution: Theory and experiment

AU - Ronald, K

AU - Phelps, A D R

AU - Bingham, R

AU - Speirs, D C

AU - Cross, A W

AU - Vorgul, I

AU - Cairns, R A

AU - Kellett, B J

AU - Whyte, C G

AU - Robertson, C W

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

U2 - 10.1063/1.2158784

DO - 10.1063/1.2158784

M3 - Conference contribution

SN - 0-7354-0298-1

T3 - AIP Conference Proceedings

SP - 246

EP - 251

BT - High Energy Density and High Power RF

A2 - Abe, DK

A2 - Nusinovich, GS

PB - American Institute of Physics

CY - Melville, NY

T2 - 7th Workshop on High Energy Density and High Power RF

Y2 - 13 June 2005 through 17 June 2005

ER -

Microwave generation from an electron horseshoe distribution: Theory and experiment

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Beam Driven Instabilities in Magnetized: Beam diven instabilities in magnetized plasmas

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