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Sanmartín Losada, Juan Ramón and López-Rebollal, Óscar (2007). A theory of electron collection by a grid sphere. In: "10th Spacecraft Charging Technology Conference", 18-21 jun, Biarritz.
Title: | A theory of electron collection by a grid sphere |
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Author/s: |
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Item Type: | Presentation at Congress or Conference (Article) |
Event Title: | 10th Spacecraft Charging Technology Conference |
Event Dates: | 18-21 jun |
Event Location: | Biarritz |
Title of Book: | 10th Spacecraft Charging Technology Conference |
Date: | 2007 |
Subjects: | |
Faculty: | E.T.S.I. Aeronáuticos (UPM) |
Department: | Física Aplicada a la Ingeniería Aeronáutica [hasta 2014] |
Creative Commons Licenses: | Recognition - No derivative works - Non commercial |
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Use of a spherical grid as electron collector at the anodic end of a tether, as recently proposed, is considered. The standard analysis of space-charge limited current to a solid sphere (with neither magnetic nor plasma-motion effects), which has been shown to best fit TSS1R in-orbit results at very high bias, is used to determine effects from grid transparency on current collected; the analysis is first reformulated in the formalism recently introduced in the two-dimensional analysis of bare-tethers. A discussion of the electric potential created by a spherical grid in vacuum is then carried out; it is shown that each grid-wire collects current well below its maximum OML current, the effective grid transparency being close to its optical value. Formulae for the current to a spherical grid, showing the effects of grid transparency, is determined. A fully consistent analysis of electric potential and electron density, outside and inside the grid, is completed.
Item ID: | 25758 |
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DC Identifier: | https://oa.upm.es/25758/ |
OAI Identifier: | oai:oa.upm.es:25758 |
Deposited by: | Biblioteca ETSI Aeronauticos |
Deposited on: | 12 May 2014 09:53 |
Last Modified: | 14 Feb 2023 11:47 |