Theory of wave activity occuring in the AMPTE artificial comet

R. Bingham, V. D. Shapiro, V. N. Tsytovich, U. de Angelis, M. Gilman, V. I. Shevchenko

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

One of the main experiments of the Active Magnetospheric Particle Tracer Explorers (AMPTE) [J. Geophys. Res. 9 1, 10013 (1986)] satellite mission was the release of neutral barium atoms in the solar wind. The barium atoms ionized by photoionization extremely rapidly forming a dense, expanding, plasma cloud that interrupted the solar wind flow creating diamagnetic cavities. On the upstream side of the cavity a region of compressed plasma and enhanced magnetic field was created as the result of being produced by the slowing down and deflection of the solar wind, and magnetic field line draping. Intense electrostatic and magnetic turbulence was observed by both the IRM [J. Geophys. Res. 9 1, 10 013 (1986)] and UKS [J. Geophys. Res. 9 1, 1320 (1986)] satellites at the boundary of the diamagnetic cavity, with the most intense waves being detected near the outer boundary of the compressed region. This paper examines how the newly created expanding plasma couples to the solar wind by means of plasma–beam and current‐driven instabilities. In particular, it is shown how lower‐hybrid and lower‐hybrid drift waves are generated by cross‐field proton–barium streaming instabilities and cross‐field electron currents. The saturation mechanism for these waves is considered to be the modulational instability, this instability can also lead to filamentation and coupling to magnetosonic modes, which are also observed. As the result of modulational instability the k component increases, which allows the heating and acceleration of electrons that is consistent with the observations.
LanguageEnglish
Pages1728-1738
Number of pages11
JournalPhysics of Fluids B
Volume3
Issue number7
DOIs
Publication statusPublished - 1 Jul 1991

Fingerprint

Solar wind
comets
tracers
Barium
solar wind
Plasmas
barium
cavities
Satellites
Magnetic fields
Atoms
Photoionization
Plasma stability
information resources management
Electrons
plasma clouds
dense plasmas
Protons
Electrostatics
Turbulence

Keywords

  • plasma
  • magnetosphere
  • neutral barium atoms
  • magnetic field

Cite this

Bingham, R., Shapiro, V. D., Tsytovich, V. N., de Angelis, U., Gilman, M., & Shevchenko, V. I. (1991). Theory of wave activity occuring in the AMPTE artificial comet. Physics of Fluids B, 3(7), 1728-1738. https://doi.org/10.1063/1.859984
Bingham, R. ; Shapiro, V. D. ; Tsytovich, V. N. ; de Angelis, U. ; Gilman, M. ; Shevchenko, V. I. / Theory of wave activity occuring in the AMPTE artificial comet. In: Physics of Fluids B. 1991 ; Vol. 3, No. 7. pp. 1728-1738.
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Bingham, R, Shapiro, VD, Tsytovich, VN, de Angelis, U, Gilman, M & Shevchenko, VI 1991, 'Theory of wave activity occuring in the AMPTE artificial comet' Physics of Fluids B, vol. 3, no. 7, pp. 1728-1738. https://doi.org/10.1063/1.859984

Theory of wave activity occuring in the AMPTE artificial comet. / Bingham, R.; Shapiro, V. D.; Tsytovich, V. N.; de Angelis, U.; Gilman, M.; Shevchenko, V. I.

In: Physics of Fluids B, Vol. 3, No. 7, 01.07.1991, p. 1728-1738.

Research output: Contribution to journalArticle

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T1 - Theory of wave activity occuring in the AMPTE artificial comet

AU - Bingham, R.

AU - Shapiro, V. D.

AU - Tsytovich, V. N.

AU - de Angelis, U.

AU - Gilman, M.

AU - Shevchenko, V. I.

PY - 1991/7/1

Y1 - 1991/7/1

N2 - One of the main experiments of the Active Magnetospheric Particle Tracer Explorers (AMPTE) [J. Geophys. Res. 9 1, 10013 (1986)] satellite mission was the release of neutral barium atoms in the solar wind. The barium atoms ionized by photoionization extremely rapidly forming a dense, expanding, plasma cloud that interrupted the solar wind flow creating diamagnetic cavities. On the upstream side of the cavity a region of compressed plasma and enhanced magnetic field was created as the result of being produced by the slowing down and deflection of the solar wind, and magnetic field line draping. Intense electrostatic and magnetic turbulence was observed by both the IRM [J. Geophys. Res. 9 1, 10 013 (1986)] and UKS [J. Geophys. Res. 9 1, 1320 (1986)] satellites at the boundary of the diamagnetic cavity, with the most intense waves being detected near the outer boundary of the compressed region. This paper examines how the newly created expanding plasma couples to the solar wind by means of plasma–beam and current‐driven instabilities. In particular, it is shown how lower‐hybrid and lower‐hybrid drift waves are generated by cross‐field proton–barium streaming instabilities and cross‐field electron currents. The saturation mechanism for these waves is considered to be the modulational instability, this instability can also lead to filamentation and coupling to magnetosonic modes, which are also observed. As the result of modulational instability the k ∥ component increases, which allows the heating and acceleration of electrons that is consistent with the observations.

AB - One of the main experiments of the Active Magnetospheric Particle Tracer Explorers (AMPTE) [J. Geophys. Res. 9 1, 10013 (1986)] satellite mission was the release of neutral barium atoms in the solar wind. The barium atoms ionized by photoionization extremely rapidly forming a dense, expanding, plasma cloud that interrupted the solar wind flow creating diamagnetic cavities. On the upstream side of the cavity a region of compressed plasma and enhanced magnetic field was created as the result of being produced by the slowing down and deflection of the solar wind, and magnetic field line draping. Intense electrostatic and magnetic turbulence was observed by both the IRM [J. Geophys. Res. 9 1, 10 013 (1986)] and UKS [J. Geophys. Res. 9 1, 1320 (1986)] satellites at the boundary of the diamagnetic cavity, with the most intense waves being detected near the outer boundary of the compressed region. This paper examines how the newly created expanding plasma couples to the solar wind by means of plasma–beam and current‐driven instabilities. In particular, it is shown how lower‐hybrid and lower‐hybrid drift waves are generated by cross‐field proton–barium streaming instabilities and cross‐field electron currents. The saturation mechanism for these waves is considered to be the modulational instability, this instability can also lead to filamentation and coupling to magnetosonic modes, which are also observed. As the result of modulational instability the k ∥ component increases, which allows the heating and acceleration of electrons that is consistent with the observations.

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KW - magnetic field

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U2 - 10.1063/1.859984

DO - 10.1063/1.859984

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VL - 3

SP - 1728

EP - 1738

JO - Physics of Fluids B

T2 - Physics of Fluids B

JF - Physics of Fluids B

SN - 0899-8221

IS - 7

ER -

Bingham R, Shapiro VD, Tsytovich VN, de Angelis U, Gilman M, Shevchenko VI. Theory of wave activity occuring in the AMPTE artificial comet. Physics of Fluids B. 1991 Jul 1;3(7):1728-1738. https://doi.org/10.1063/1.859984