Particle and wave dynamics during plasma injections

Koons, H. C.; Fennell, J. F.

doi:10.1029/ja088ia08p06221

Cited by 12 publications

(4 citation statements)

References 21 publications

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“…Observations of intense plasma wave turbulence on auroral field lines (Gurnett and Frank, 1977), near the polar cusp (Gurnett and Frank, 1978), and in regions of large-scale Birkeland currents provide the basis for Birketand currents and plasma wave correlative studies. Impulsive bursts observed with wave instruments on the Scatha spacecraft have been interpreted as being the result of spacecraft charging (Koons and Fennel, 1983). To resolve this question, we have examined the spacecraft potential and found that there were no drastic changes in it during the measurements presented here (L. Block, private communication, 1986).…”

Section: Introductionsupporting

confidence: 75%

Impulsive electrostatic waves and field‐aligned currents observed in the entry layer

Erlandson

Pottelette²,

Potemra

et al. 1987

Geophysical Research Letters

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Impulsive electrostatic waves have been observed in regions of downward‐flowing region 1 Birkeland currents in data acquired by the High Frequency Wave and Magnetic Field instruments on the Viking satellite. These data were obtained at approximately 11,000 km altitude and in the 1100 MLT and 76° invariant latitude sector near the equatorward boundary of the dayside polar cusp. Wave and magnetic field data are presented from Viking orbit 1219 on October 1, 1986, and wave, magnetic field, and particle data acquired with the Hot Plasma instrument from orbit 1197 on September 27, 1986. The high frequency waves are observed between the electron plasma and cyclotron frequencies. Since the broadband electrostatic waves extend in frequency above the cold plasma frequency, a nonlinear treatment must be made to explain the observation. We suggest that electron acoustic waves may couple with other electron plasma waves, resulting in the distribution of wave power over a wide range of frequencies. A strong correlation exists between large‐scale downward‐flowing Birkeland currents (region 1 system) and impulsive electrostatic waves. The Viking Magnetic Field experiment allows one to resolve, in high time‐resolution, electron beams that may be unstable to the impulsive electrostatic waves.

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Section: Introductionsupporting

confidence: 75%

Impulsive electrostatic waves and field‐aligned currents observed in the entry layer

Erlandson

Pottelette²,

Potemra

et al. 1987

Geophysical Research Letters

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“…Shaw and Gurnett [1975] reported ECH emissions of 10 mV m -• amplitude that were detected by IMP 6 at radial distances beyond the plasmapause up to 10 R E. The ISEE spacecraft detected ECH waves with amplitudes as large as 1 mV m -• in this region [Gurnett et al, 1979]. Koons and Fennell [1983] emphasized the transient nature of ECH waves by noting that these emissions were detected by SCATHA only during sporadic, highly time dependent particle injection events. This characteristic of the wave emissions is in sharp contrast to the continuous and large-scale spatial nature of the diffuse precipitation.…”

Section: Introductionmentioning

confidence: 98%

A survey of electron cyclotron waves in the magnetosphere and the diffuse auroral electron precipitation

Roeder¹,

Koons²

1989

J. Geophys. Res.

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Natural electron cyclotron harmonic emissions in the outer magnetosphere are often cited as the electron scattering mechanism which results in the diffuse auroral precipitation. A survey is presented of the characteristics of these waves using data from both the SCATHA and Active Magnetospheric Particle Tracer Explorers (AMPTE) IRM plasma wave instruments. The emissions were observed most often in the 0300–0600 LT sector at L ∼ 4–8 and magnetic latitudes in the range ±10°. In this region, emissions exceeding 35 µV m−1 were detected only 25% of the time, and those exceeding 12 µV m−1 were detected 60% of the time. In agreement with Belmont et al. (1983), these amounts are grossly insufficient to account for the diffuse auroral electron precipitation by quasi‐linear pitch angle diffusion.

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“…The space environment is harsh and can adversely affect mission effectiveness through its interaction with spacecraft, components, and materials (Dennison, 2015; Hastings & Garrett, 1996; Lai, 2011). Indeed, environmentally induced anomalies are dominated by spacecraft charging effects (Koons et al, 1999), with the majority related in some way to electrostatic discharge or charging effects (Bedingfield et al, 1996; Leach & Alexander, 1995).…”

Section: Introductionmentioning

confidence: 99%

Strategies for Determining Electron Yield Material Parameters for Spacecraft Charge Modeling

Lundgreen

Dennison

2020

Space Weather

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Accurate modeling of spacecraft charging is essential to mitigate well-known and all-too-common deleterious and costly effects on spacecraft resulting from charging induced by interactions with the space plasma environment. This paper addresses how limited availability of electron emission and transport properties of spacecraft materials-in particular, secondary electron yields-and the wide ranges measured for such properties pose a critical issue for modeling spacecraft charging. It describes a materials charging database for electron emission properties under development, which facilitates more accurate spacecraft charge modeling when used in concert with the strategies outlined herein. These data and techniques provide tools for more accurate material selection, increased confidence in charge models, and a concomitant decrease in mission risk. They also allow better customization of models in response to prolonged space environment exposure and specific mission requirements, which may evolve materials properties.

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Particle and wave dynamics during plasma injections

Cited by 12 publications

References 21 publications

Impulsive electrostatic waves and field‐aligned currents observed in the entry layer

Impulsive electrostatic waves and field‐aligned currents observed in the entry layer

A survey of electron cyclotron waves in the magnetosphere and the diffuse auroral electron precipitation

Strategies for Determining Electron Yield Material Parameters for Spacecraft Charge Modeling

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