Vacuum solid-state ion-conducting silver source for application in field emission electric propulsion systems

Alexander Tolstogouzov, Hugo Aguas, Rachid Ayouchi, Sergey F. Belykh, Fábio Fernandes, Gennady P. Gololobov, Augusto M C Moutinho, Reinhard Schwarz, Dmitry V. Suvorov, Orlando M N D Teodoro

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A point-like silver ion source with thin film of RbAg4I5 solid electrolyte was developed for application in field emission electric propulsion systems. The solid electrolyte produced by mechano-chemical synthesis was deposited on the apex of a silver tip using pulsed laser deposition. The running tests at 195 °C working temperature and 10 kV accelerating potential have demonstrated that the source can continuously produce positive ion current of several hundred pA during a few days with a peak value of 25–50 nA. Using TOF-SIMS analysis it has been shown that the ion current consists of Ag+ with a small contribution of Rb+, lower than 0.5 at.%. We suggest that Ag+ emission occurs mainly by means of field-assisted ion evaporation and/or ion desorption, and the solid electrolyte plays a role of the transport system, in which the emitted Ag+ ions are continually replaced by mobile Ag+ ions delivered from the silver reservoir by direct mass transfer under the influence of an external electric field.

Original languageEnglish
Pages (from-to)252-258
Number of pages7
JournalVacuum
Volume131
DOIs
Publication statusPublished - 1 Sep 2016

Keywords

  • Field emission electric propulsion (FEEP)
  • Pulsed laser deposition
  • RbAgI solid electrolyte
  • Solid-state ion source
  • Time-of-flight secondary ion mass spectrometry (TOF-SIMS)

Fingerprint Dive into the research topics of 'Vacuum solid-state ion-conducting silver source for application in field emission electric propulsion systems'. Together they form a unique fingerprint.

  • Cite this