Potential buildup on an electron-emitting ionospheric satellite

Parker, L. W.; Murphy, Brian L.

doi:10.1029/jz072i005p01631

Cited by 197 publications

(95 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Overall use of these two constants leads to the Parker-Murphy current law, which takes the character of an upper bound at the high bias of interest. 14 For e⌽ p ӷkT e and cylindrical geometry one has…”

Section: Circular Cylinder At Rest In a Magnetized Plasmamentioning

confidence: 99%

The orbital-motion-limited regime of cylindrical Langmuir probes

Sanmartin¹,

Estes²

1999

Physics of Plasmas

113

164

View full text Add to dashboard Cite

An asymptotic analysis of electron collection at high bias ⌽ p serves to determine the domain of validity of the orbital-motion-limited ͑OML͒ regime of cylindrical Langmuir probes, which is basic for the workings of conductive bare tethers. The radius of a wire collecting OML current in an unmagnetized plasma at rest cannot exceed a value, R max , which is found to exhibit a minimum as a function of ⌽ p ; at ⌽ p values of interest, R max is already increasing and is larger than the electron Debye length De . The breakdown of the regime relates to conditions far from the probe, at electron energies comparable to the ion thermal energy, kT i ; R max is found to increase with T i . It is also found that ͑1͒ the maximum width of a thin tape, if used instead of a wire, is 4R max ; ͑2͒ the electron thermal gyroradius must be larger than both R and De for magnetic effects to be negligible; and ͑3͒ conditions applying to the tether case are such that trapped-orbit effects are negligible.

show abstract

Section: Circular Cylinder At Rest In a Magnetized Plasmamentioning

confidence: 99%

The orbital-motion-limited regime of cylindrical Langmuir probes

Sanmartin¹,

Estes²

1999

Physics of Plasmas

113

164

View full text Add to dashboard Cite

show abstract

“…Theoretical models of the spacecraft charging due to the beam injection have been presented by BEARD and JOHNSON (1961), PARKER andMURPHY (1967), andLINSON (1969). Beard and Johnson propose a charging model based on the space-charge-limit current where the magnetic field can be neglected.…”

Section: Introductionmentioning

confidence: 99%

Rotating Electrons Discharge Model for a Spacecraft Emitting a High Power Electron Beam in Space

Sasaki

Tazawa

Kawashima

et al. 1984

J. geomagn. geoelec

View full text Add to dashboard Cite

A discharge model around a positively charged body in a magnetized plasma has been studied experimentally in relation to the charging effect of a spacecraft emitting an electron beam in space. It has been found that there exist rotating electrons trapped around the charged body driven by the magnetic and electric fields, which can cause the ionization surrounding the charged body even under low pressure (Rotating Electrons Discharge). This effect gives the explanation for the experimental result that the charging effect of a spacecraft emitting a high power electron beam in the ionosphere has been generally much weaker than the predictions based on the theoretical charging models previously proposed.

show abstract

“…It has been suggested by GALEEv et al (1976) and independently by the present authors (CARTWRIGHT et al,1978) that this mechanism might ignite a cross-field discharge (also called Penning discharge, PIG discharge and rotating electrons discharge) and that the resulting current might be enough to keep the rocket neutralized and hold its potential at the modest value necessary to keep the cross-field discharge going. This would reduce the rocket potential well below values predicted by BEARD and JOHNSON (1961), PARKER andMURPHY (1967) andLINSON (1969). Such a discharge has been produced in a laboratory experiment by SASAKI et al (1984).…”

mentioning

confidence: 99%