Preliminary results on a pulsed capillary discharge
Journal Article
·
· AIP Conference Proceedings
- Plasma Research Laboratory, Physics Department, University of Malaya, 50603 Kuala Lumpur (Malaysia)
- Laboratoire de Physique des Milieux Ionises, Ecole Polytechnique Palaiseau 91128 (France)
- Institute of Spectroscopy, Russian Academy of Science Troitz, Moscow Region 142092 (Russian Federation)
A small 17 J pulsed capillary discharge has been set up for studies on its VUV and X-ray emission characteristics. The discharge is triggered by the on-axis electron beam produced by the transient hollow cathode effect which has been integrated into the capillary discharge system. For the present work, a teflon capillary with diameter of 1 mm and length of 10 mm is used. Time resolved spectroscopic diagnostics have been used to study the evolution of the discharge plasma. Two groups of dominant lines in the emission spectrum are observed. One group consists of lines belonging to F-VI, F-VII, F-VIII, O-V, O-VI and O-VII in the 5.5 to 30 nm region, while another group consists of lines belonging to C-III and C-IV in the 30 to 50 nm region. Significant variation of the emission is observed on time scale of several nanoseconds. The operation of the discharge is found to change significantly with the value of the residual pressure in the evacuated capillary. Time resolved observation of the hard X-ray emission reveal the role of the self-forming electron beams in discharge initiation. The relatively slow current rate of rise leads to significant influx of wall materials and the discharge is predominantly in the ablative mode.
- OSTI ID:
- 21172355
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 409; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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