A theory of electron collection by a grid sphere

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.

Description

Title: A theory of electron collection by a grid sphere
Author/s:
  • Sanmartín Losada, Juan Ramón
  • López-Rebollal, Óscar
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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Abstract

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.

More information

Item ID: 25758
DC Identifier: http://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: 22 Sep 2014 11:38
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