Augsburg 2006 – scientific programme
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P: Plasmaphysik
P 10: Niedertemperaturplasmen / Plasmatechnologie 3
P 10.6: Talk
Tuesday, March 28, 2006, 12:45–13:00, 1002
Comparison between the vacuum ultraviolet emission from microhollow cathode discharge and capillary tube discharge — •Byung-Joon Lee1, Isfried Petzenhauser1, John McGurk1, Klaus Frank1, and Konstantinos P Giapis2 — 1Physics Department I, University of Erlangen-Nuremberg, D-91058 Erlangen, Germany — 2Division of Chemistry and Chemical Engineering Califonia Institute of Technology, Pasadena, California 91125
Recently, there are considerable investigations in the area of microplasmas at atmospheric pressure. Microplasmas have a scale from 10 µm to 200 µm and produce stable nonequilibrium gas discharges. Such small scale plasmas are predicted to have applications in various areas including remediation of gaseous pollutants, lab-on-a-chip, nanoparticle synthesis and vacuum ultraviolet light sources. We investigated two concepts of microplasmas i.e. microhollow cathode discharge (MHCD) and capillary tube discharge in order to genetrate intense vacuum ultraviolet (VUV) emission in xenon gas. Both microplasmas can be operated not only in D.C. mode but also in pulse mode by applying high voltages for several tens of nanoseconds. The generation of VUV emission from two microplasmas are compared in D.C. modes as a function of pressure, current and gas flowing rates as well as in pulse mode with changing pulse duration.