Dynamic properties of ultra-fast pulsed capillary discharge devices

Conference · Thu Jul 01 04:00:00 EDT 1999

OSTI ID:20050666

Krisch, I; Choi, P; Dumitrescu, C; Engel, A; Larour, J; Rous, J; Juschkin, L; Kunze, H J

The authors report a fast pulsed capillary discharge device, which combines the features of transient hollow cathode discharge with the inherent characteristics of the capillary discharge to guarantee radiation in the VUV and soft X-ray region with ns rise time. Various combinations of discharge parameters differing in capacitance of the cell, in the aspect ratio and in the pressure of the filling gas have been studied in order to optimize this table top source to technical and scientific backlighting applications. After rapidly igniting the discharge by an electron beam resulting from the hollow cathode effect, the plasma emits bright radiation in the soft-X-ray and VUV region, with {lambda} {ge} 3 nm. Using Argon as the filling gas, the spectrum consists of Ar VII to Ar X lines during the period of extreme emission. Energy losses due to radial thermal conduction effect shorten the radiation pulse. A series of VUV spectra which are detected by a calibrated spectrometer covers the period of the discharge and allows a quick estimation of discharge parameters. The spatial evolution of the radiation source is studied using a time resolved Slit-Wire camera. Two different regimes of wall and gas dominated discharges have been identified based upon the spectra obtained, under different operating pressures.

• Research Organization: Ecole Polytechnique, Palaiseau (FR)
• OSTI ID: 20050666
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
ARGON
ELECTRIC DISCHARGES
EMISSION SPECTRA
ENERGY LOSSES
FAR ULTRAVIOLET RADIATION
PLASMA PRODUCTION
RADIATION SOURCES
USES
X-RAY SOURCES