Optical observation of localized plasma after pulsed discharges in liquid helium

Author

Kojima, C. ; Minami, Kazuyuki ; Komatsu, Satoshi ; Shundo, M. ; Ishihara, O.

Author_Institution

Graduate Sch. of Sci. & Technol., Niigata Univ., Japan

fYear

2003

fDate

5-5 June 2003

Firstpage

343

Abstract

Summary form only given, as follows. Transient localized high-density plasma, in liquid helium (LHe) has been studied. Stark broadening of a He spectral line reveals the spatial and temporal evolution in the decaying plasma with density above 10/sup 16/ cm/sup -3/ produced by pulsed discharge between a pair of W needle electrodes in gaseous bubble surrounded by LHe. When one of the electrodes is replaced by Mg rod, strong spectral lines of Mg atoms are observed. Measurements axe made for two cases that the common axis of the electrodes is horizontal and vertical. In these cases, the density distribution in the directions, respectively, along and across the common axis can be measured.

Keywords

Stark effect; discharges (electric); liquid helium; plasma density; plasma diagnostics; plasma production; spectral line broadening; He; Stark broadening; continuum lights; decaying plasma; density distribution; liquid helium; localized plasma; low-density plasma layer; pulsed discharges; spatial evolution; temporal evolution; time-resolved spectral line profiles; transient high-density plasma; Electrodes; Helium; Nuclear and plasma sciences; Optical pulses; Plasma density; Plasma measurements; Plasma simulation; Plasma sources; Plasma waves; Resonance;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science, 2003. ICOPS 2003. IEEE Conference Record - Abstracts. The 30th International Conference on

Conference_Location

Jeju, South Korea

ISSN

0730-9244

Print_ISBN

0-7803-7911-X

Type

conf

DOI

10.1109/PLASMA.2003.1228944

Filename

1228944