Reacting dynamics of the laser ablation plume

Thomas Svobodny, Rand Biggers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Pulsed laser ablation of metals and oxides have been carried out under controlled conditions. Process control parameters such as laser power, laser excitation voltage, beam focus, chamber pressure, substrate temperature, pulse repetition rate, and target rotation rate were changed and the outputs analyzed. The real-time signature of the plume has been studied and characterized. These experimental results are compared with mathematical models of the ablation process and the supersonic plume propagation wave. We can explain with reference to the correlation of real-time spectroscopy some anomalies present in the ablation process involving the non-equilibrium production of oxides. In the computational model for the reacting pulsed-laser ablation plume, the stoichiometry depends on input energy via a prescribed inlet velocity, density, and temperature, which are calculated at the edge of a Knudsen layer. We conclude that a sharp reaction front promotes a quick rise to desired stoichiometry, which can be important in applications involving deposition onto substrates. © 2003 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

Original languageEnglish
Title of host publication41st Aerospace Sciences Meeting and Exhibit
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624100994
DOIs
StatePublished - 2003
Event41st Aerospace Sciences Meeting and Exhibit 2003 - Reno, NV, United States
Duration: Jan 6 2003Jan 9 2003

Publication series

Name41st Aerospace Sciences Meeting and Exhibit

Conference

Conference41st Aerospace Sciences Meeting and Exhibit 2003
Country/TerritoryUnited States
CityReno, NV
Period1/6/031/9/03

ASJC Scopus Subject Areas

  • Space and Planetary Science
  • Aerospace Engineering

Keywords

  • Laser ablation
  • Oxidation reactions
  • Plume dynamics
  • Shock
  • Supersonic jet
  • Vorticity

Disciplines

  • Aerospace Engineering

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