Interactive spacecraft charging interactive handbook with integrated, updated spacecraft charging models

Katz, Ira; Davis, V. A.; Mandell, M. J.; Gardner, B.; Hilton, J.; Minor, Jody; Fredrickson, A.; Cooke, D. L.

doi:10.2514/6.1999-4594

Cited by 2 publications

(3 citation statements)

References 5 publications

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“…The ion‐generated secondary yield properties are chosen to be consistent with the curve for incident hydrogen ions of Barnett et al [1977], which tabulates data from Large and Whitlock [1962]. The effective atomic number, which is used to compute the backscatter, is the default value for graphite in the SEE Interactive Spacecraft Charging Handbook [ Katz et al , 2000].…”

Section: Net Fluxesmentioning

confidence: 99%

“…Net charging flux calculations were also done using material property sets appropriate to optical solar reflectors, solar cells, Gold, and Kapton taken from the SEE Interactive Spacecraft Charging Handbook [ Katz et al , 2000]. These sets of material properties each give a much larger positive net charging flux than does graphite for spacecraft potentials in the hundreds to thousands of volts, primarily due to higher average secondary electron emission.…”

Section: Net Fluxesmentioning

confidence: 99%

“…Several three‐dimensional computer codes are available to compute spacecraft surface charging in a tenuous plasma environment (NASCAP/GEO [ Katz et al , 1979], SEE Interactive Spacecraft Charging Handbook [ Katz et al , 2000], and Nascap ‐ 2k [ Davis et al , 2002]). The computer codes all use a Maxwellian or a double Maxwellian distribution function to describe the charging environment.…”

Section: Introductionmentioning

confidence: 99%

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Representation of the measured geosynchronous plasma environment in spacecraft charging calculations

2008

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1] Historically, the characterization of the magnetospheric environment has limited our ability to determine spacecraft surface charging levels. One difficulty lies in the common practice of fitting the plasma data to a Maxwellian or Double Maxwellian distribution function, which may not represent the data well for use in spacecraft charging simulations. We use electron and ion flux spectra measured by the Los Alamos National Laboratory (LANL) Magnetospheric Plasma Analyzer (MPA) during eclipse in September 2001 to examine how the use of different spectral representations of the charged particle environment in computations of spacecraft potentials during magnetospheric substorms affects the accuracy of the results. We examine charging and noncharging flux spectra and the relationships between the density and temperature moments. We then calculate the spacecraft potential (zero net current) using both the measured fluxes and several different fits to these fluxes. The potential computed using the measured fluxes and secondary and backscattered fluxes computed for graphite carbon, with a constant fraction of 81% of secondary electrons escaping, is within a factor of three of the measured potential for 87% of the data. Potentials calculated using a Kappa function fit to the electron flux and a Maxwellian function fit to the ion flux agree with measured potentials nearly as well. Alternative spectral representations give less accurate estimates. The use of all the components of the net flux, along with spacecraft specific average material properties, gives a better estimate of the spacecraft potential than the measured flux from a single high-energy channel.Citation: Davis, V. A., M.

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Section: Net Fluxesmentioning

confidence: 99%

Section: Net Fluxesmentioning

confidence: 99%