The Langmuir probe as a diagnostic of the electron component within low temperature laser ablated plasma plumes

I. Weaver, G.W. Martin, Bill Graham, Thomas Morrow, Ciaran Lewis

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

A Langmuir probe has been used as a diagnostic of the temporally evolving electron component within a laser ablated Cu plasma expanding into vacuum, for an incident laser power density on target similar to that used for the pulsed laser deposition of thin films. Electron temperature data were obtained from the retarding region of the probe current/voltage (I/V) characteristic, which was also used to calculate an associated electron number density. Additionally, electron number density data were obtained from the saturation electron current region of the probe (I/V) characteristic. Electron number density data, extracted by the two different techniques, were observed to show the same temporal form, with measured absolute values agreeing to within a factor of 2. The Langmuir probe, in the saturation current region, has been shown for the first time to be a convenient diagnostic of the electron component within relatively low temperature laser ablated plasma plumes. (C) 1999 American Institute of Physics. [S0034-6748(99)01503-8].
Original languageEnglish
Pages (from-to)1801-1805
Number of pages5
JournalReview of Scientific Instruments
Volume70
Issue number3
Publication statusPublished - Mar 1999

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Instrumentation

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