Analysis of thermionic bare tether operation regimes in passive mode

Sanmartín Losada, Juan Ramón and Chen, Xin and Sánchez Arriaga, Gonzalo (2017). Analysis of thermionic bare tether operation regimes in passive mode. "Physics of Plasmas", v. 24 (n. 1); p. 13515. ISSN 1089-7684. https://doi.org/10.1063/1.4974764.

Description

Title: Analysis of thermionic bare tether operation regimes in passive mode
Author/s:
  • Sanmartín Losada, Juan Ramón
  • Chen, Xin
  • Sánchez Arriaga, Gonzalo
Item Type: Article
Título de Revista/Publicación: Physics of Plasmas
Date: February 2017
Volume: 24
Subjects:
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Física Aplicada a las Ingenierías Aeronáutica y Naval
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A thermionic bare tether (TBT) is a long conductor coated with a low work-function material. In drag mode, a tether segment extending from anodic end A to a zero-bias point B, with the standard Orbital-motion-limited current collection, is followed by a complex cathodic segment. In general, as bias becomes more negative in moving from B to cathodic end C, one first finds space-chargelimited (SCL) emission covering up to some intermediate point B*, then full Richardson-Dushman (RD) emission reaching from B* to end C. An approximate analytical study, which combines the current and voltage profile equations with results from asymptotic studies of the Vlasov-Poisson system for emissive probes, is carried out to determine the parameter domain covering two limit regimes, which are effectively controlled by just two dimensionless parameters involving ambient plasma and TBT material properties. In one such limit regime, no point B* is reached and thus no segment full RD emission develops. In an opposite regime, SCL segment BB* is too short to contribute significantly to the current balance.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainRYC-2014-15357UnspecifiedGonzalo Sáznchez ArriagaUnspecified

More information

Item ID: 45320
DC Identifier: http://oa.upm.es/45320/
OAI Identifier: oai:oa.upm.es:45320
DOI: 10.1063/1.4974764
Official URL: http://aip.scitation.org/doi/pdf/10.1063/1.4974764
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 27 Mar 2017 12:35
Last Modified: 27 Mar 2017 12:36
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