Electrodynamics effects in beam/return current systems and their implications for solar impulsive bursts

J. C. Brown, R. Bingham

Research output: Contribution to journal › Article

Abstract

The electrodynamics of electron beam neutralisation in solar flares is discussed in order to resolve recent controversy over the origin and evolution of the return current. It is demonstrated that return currents are established electrostatically and that the large radii of flare beams imply a resistive time scale so long that inductive effects are negligible along the finite beam length, even for anomalous conductivities. Consequently the commonly used steady state electrostatic (Knight and Sturrock) treatment of return current dissipation in flares is amply justified.
LanguageEnglish
PagesL11-L14
Number of pages4
JournalAstronomy and Astrophysics
Volume131
Issue number2
Publication statusPublished - Feb 1984

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electrodynamics
bursts
flares
beam neutralization
neutralization
dissipation
conductivity
solar flares
timescale
electron
electron beams
electrostatics
radii
effect

Keywords

  • electron beam neutralisation
  • solar flares
  • return current
  • electrodynamics
  • electron beams
  • plasma currents
  • electric fields
  • electrostatic charge
  • space charge
  • steady state
  • x rays

Cite this

Brown, J. C. ; Bingham, R. / Electrodynamics effects in beam/return current systems and their implications for solar impulsive bursts. In: Astronomy and Astrophysics. 1984 ; Vol. 131, No. 2. pp. L11-L14.
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abstract = "The electrodynamics of electron beam neutralisation in solar flares is discussed in order to resolve recent controversy over the origin and evolution of the return current. It is demonstrated that return currents are established electrostatically and that the large radii of flare beams imply a resistive time scale so long that inductive effects are negligible along the finite beam length, even for anomalous conductivities. Consequently the commonly used steady state electrostatic (Knight and Sturrock) treatment of return current dissipation in flares is amply justified.",
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Brown, JC & Bingham, R 1984, 'Electrodynamics effects in beam/return current systems and their implications for solar impulsive bursts' Astronomy and Astrophysics, vol. 131, no. 2, pp. L11-L14.

Electrodynamics effects in beam/return current systems and their implications for solar impulsive bursts. / Brown, J. C.; Bingham, R.

In: Astronomy and Astrophysics, Vol. 131, No. 2, 02.1984, p. L11-L14.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Electrodynamics effects in beam/return current systems and their implications for solar impulsive bursts

AU - Brown, J. C.

AU - Bingham, R.

PY - 1984/2

Y1 - 1984/2

N2 - The electrodynamics of electron beam neutralisation in solar flares is discussed in order to resolve recent controversy over the origin and evolution of the return current. It is demonstrated that return currents are established electrostatically and that the large radii of flare beams imply a resistive time scale so long that inductive effects are negligible along the finite beam length, even for anomalous conductivities. Consequently the commonly used steady state electrostatic (Knight and Sturrock) treatment of return current dissipation in flares is amply justified.

AB - The electrodynamics of electron beam neutralisation in solar flares is discussed in order to resolve recent controversy over the origin and evolution of the return current. It is demonstrated that return currents are established electrostatically and that the large radii of flare beams imply a resistive time scale so long that inductive effects are negligible along the finite beam length, even for anomalous conductivities. Consequently the commonly used steady state electrostatic (Knight and Sturrock) treatment of return current dissipation in flares is amply justified.

KW - electron beam neutralisation

KW - solar flares

KW - return current

KW - electrodynamics

KW - electron beams

KW - plasma currents

KW - electric fields

KW - electrostatic charge

KW - space charge

KW - steady state

KW - x rays

UR - http://cdsads.u-strasbg.fr/cgi-bin/nph-iarticle_query?bibcode=1984A%26A...131L..11B

UR - http://www.aanda.org/

M3 - Article

VL - 131

SP - L11-L14

JO - Astronomy and Astrophysics

T2 - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

IS - 2

ER -

Brown JC, Bingham R. Electrodynamics effects in beam/return current systems and their implications for solar impulsive bursts. Astronomy and Astrophysics. 1984 Feb;131(2):L11-L14.

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