Title :
Investigation of the plasma inhomogeneities in a plasma opening switch by laser methods
Author :
Dolgachev, G.I. ; Kalinin, Yu.G. ; Kingsep, A.S. ; Nitishinski, M.S. ; Shashkov, A.Yu. ; Ushakov, A.G. ; Zakatov, L.P.
Author_Institution :
Kurchatov (I.V.) Inst. of Atomic Energy, Moscow, Russia
fDate :
June 29 1997-July 2 1997
Abstract :
This paper is devoted to the investigation of turbulent noises in the plasma of a pulsed power plasma opening switch (POS). A diagnostic system based on a schlieren-image scheme was developed and applied at the 140 kA "Taina" facility. Using a YAG:Nd laser allows to detect plasma noises by laser beam scattering effect. Preliminary data analysis gives range of scattering angles 10/sup -3//spl divide/10/sup -2/. Scattering on nonequilibrium oscillations seems to be most probable mechanism. Estimations of the level of turbulence as well as magnetic and electric fields strength required for scattering effect are presented. The role of different oscillations (particular electrostatic and helicons) is discussed.
Keywords :
laser beam applications; plasma diagnostics; plasma switches; power supplies to apparatus; pulse generators; pulsed power switches; switchgear testing; 140 kA; YAG:Nd; YAG:Nd laser; YAl5O12:Nd; diagnostic system; laser beam scattering effect; laser methods; nonequilibrium oscillations scattering; plasma inhomogeneities; plasma noises; plasma opening switch; pulsed power; schlieren-image scheme; Acoustic beams; Acoustic scattering; Laser beams; Laser noise; Laser theory; Laser transitions; Particle beams; Plasma density; Plasma diagnostics; Switches;
Conference_Titel :
Pulsed Power Conference, 1997. Digest of Technical Papers. 1997 11th IEEE International
Conference_Location :
Baltimore, MA, USA
Print_ISBN :
0-7803-4213-5
DOI :
10.1109/PPC.1997.674566
