Title :
Experimental investigation in the recombination zone of an RF atmospheric pressure plasma jet
Author :
Kindel, E. ; Lange, H. ; Uhrlandt, D. ; Weltmann, K.-D.
Author_Institution :
Leibniz Inst. for Plasma Sci. & Technol. (INP), Greifswald, Germany
Abstract :
The present paper deals with investigations in the recombination zone or effluent of a low-frequency (kHz-range) driven atmospheric pressure plasma jet (APPJ) in argon to get a better understanding of the physical effects. The main aim was to study the possibility to detect the 4s(3P2) metastable atoms by diode laser absorption spectroscopy at very short absorption length in the range of tenth of millimetre. Moreover, it was of interest to reveal the axial structure of the metastable densities of the effluent. Additionally, the temporal behaviour of the spatial structure of the plasma jet is also investigated by means of an intensified video camera and the results provide values of the propagation velocity of the effluent.
Keywords :
argon; high-frequency discharges; infrared spectra; infrared spectroscopy; metastable states; plasma density; plasma diagnostics; plasma jets; 4s(3P2) metastable atoms; Ar; RF atmospheric pressure plasma jet; argon plasma; axial structure; diode laser absorption spectroscopy; effluent propagation velocity; intensified video camera; low-frequency driven APPJ; metastable density; recombination zone; short absorption length; spatial structure; Absorption; Argon; Atmospheric-pressure plasmas; Atomic beams; Diode lasers; Effluents; Metastasis; Plasma density; Radio frequency; Spectroscopy;
Conference_Titel :
Gas Discharges and Their Applications, 2008. GD 2008. 17th International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-0-9558052-0-2
