X-ray radiation from cathode spot fragments in low voltage vacuum arcs

Author

Vogel, Nadja

Author_Institution

Dept. of Phys., Opt. Spectrosc. & Molecule Phys., Tech. Univ. Chemnitz, Germany

Volume

1

fYear

1998

fDate

17-21 Aug 1998

Firstpage

202

Abstract

Temporal evolution of X-ray emission of laser-induced discharges was investigated by means of a picosecond X-ray streak camera. Point-like structures and thin hot layers of intensive X-ray radiation with life time from 30 ps to 1.5 ns in a spectral range 100 eV-10 keV and hence temperature T⩾100 eV have been found at first in a comparatively low voltage vacuum discharge (U≈150 V-2.7 kV) initiated by picosecond laser beam. The radiation of laser-induced breakdown was investigated just after ignition as well as with a long delay time (up to 20 ns) relative to the ignition point by the laser beam in order to eliminate the X-ray radiation coming from the laser-produced plasma

Keywords

X-ray detection; cathodes; plasma production by laser; streak cameras; streak photography; vacuum arcs; vacuum breakdown; 100 eV to 10 keV; 150 V to 2.7 kV; 30 ps to 1.5 ns; X-ray emission; X-ray radiation; cathode spot fragments; ignition point; intensive X-ray radiation; laser-induced breakdown radiation; laser-induced discharge; laser-produced plasma; low voltage vacuum arcs; low voltage vacuum discharge; picosecond X-ray streak camera; picosecond laser beam; point-like structures; spectral range; thin hot layers; Cameras; Cathodes; Delay effects; Electric breakdown; Ignition; Laser beams; Low voltage; Plasma temperature; Temperature distribution; X-ray lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 1998. Proceedings ISDEIV. XVIIIth International Symposium on

Conference_Location

Eindhoven

ISSN

1093-2941

Print_ISBN

0-7803-3953-3

Type

conf

DOI

10.1109/DEIV.1998.740607

Filename

740607