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

Volume

2

fYear

1997

fDate

June 29 1997-July 2 1997

Firstpage

1217

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/PPC.1997.674566

Filename

674566