Bochum 2002 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
P: Plasmaphysik
P 22: Poster: Magnetische Fusion, Plasmadiagnostik, Dichte Plasmen
P 22.9: Poster
Tuesday, March 19, 2002, 17:40–18:40, HZO Foyer
TOBI: A New Two-Laser Beam Infrared System for Plasma Diagnostics — •M. Osiac1, J.B. McManus2, D. Nelson2, J. Röpcke1, A. Rousseau3, and M. Zahniser2 — 1Institut für Niedertemperatur-Plasmaphysik Greifswald, Friedrich-Ludwig-Jahn-Str. 19, 17489 Greifswald, Germany — 2Aerodyne Research, Inc., 45 Manning Rd, Billerica MA 01821-3976, USA — 3Laboratoire de Physique des Gaz et des Plasmas, CNRS, Universite Paris-Sud - Bat. 210, 91405 Orsay Cedex, France
A compact and transportable two laser beam infrared (TOBI) system based on infrared absorption spectroscopy has been developed for time-resolved plasma diagnostics. The TOBI system contains two independent tunable diode lasers which can be directed through a plasma or into a multipass cell for exhaust gas detection. Rapid scan software with real-time line shape fitting provides a time resolution up to 10 microseconds to study chemical kinetic processes in plasmas. The capabilities of the TOBI system have been demonstrated in absorption spectroscopic studies in pulsed H2-N2 surface wave discharges. The observed time evolution of the NH3 production in the transition region between plasma and afterglow phase is of particular insterest.