Radiofrequency sustainment of a laser-produced plasma

Author

Kelly, K.L. ; Scharer, J.E. ; Ding, G. ; Gui, H. ; Paller, E.

Author_Institution

Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA

fYear

1999

Firstpage

118

Abstract

Summary form only given, as follows. The plasma is generated by photoionization of the organic seed molecule tetrakis(dimethylamino)ethylene (TMAE) and is sustained by RF coupling through the use of an antenna. Both highly collisional ohmic heating, and collisionless Landau wave absorption are studied as various neutral gas pressures are varied over several orders of magnitude. A multiple turn helical coil is utilized to maintain the discharge and a strong magnetic field is introduced to enhance field penetration. A strong magnetic field gradient is used to help initiate the discharge. Plasma densities of the order 10/sup 13/ cm/sup -3/ are obtained in a 2.5 cm radius tube. The computer codes ANTENA2 and MAXEB are used to help model the results. Non linear effects of collisionless damping and plasma creation are investigated. TMAE gas is being investigated as a possible seed gas for initiating atmospheric air plasmas because the plasma can be initiated with such a high initial condition.

Keywords

organic compounds; photoionisation; plasma density; plasma ohmic heating; plasma production by laser; ANTENA2 computer codes; MAXEB computer codes; RF coupling; atmospheric air plasmas; collisionless Landau wave absorption; collisionless damping; field penetration; highly collisional ohmic heating; laser-produced plasma; magnetic field gradient; multiple turn helical coil; nonlinear effects; organic seed molecule; photoionization; plasma creation; plasma density; radiofrequency sustainment; tetrakis(dimethylamino)ethylene; Atmospheric modeling; Coils; Electromagnetic wave absorption; Gas lasers; Heating; Ionization; Magnetic fields; Plasma density; Plasma waves; Radio frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science, 1999. ICOPS '99. IEEE Conference Record - Abstracts. 1999 IEEE International Conference on

Conference_Location

Monterey, CA, USA

ISSN

0730-9244

Print_ISBN

0-7803-5224-6

Type

conf

DOI

10.1109/PLASMA.1999.829330

Filename

829330