Improved operation of microsecond plasma opening switch by plasma source modification

Citation
Iv. Lisitsyn et al., Improved operation of microsecond plasma opening switch by plasma source modification, PHYS PLASMA, 6(8), 1999, pp. 3416-3421
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS OF PLASMAS
ISSN journal
1070-664X → ACNP
Volume
6
Issue
8
Year of publication
1999
Pages
3416 - 3421
Database
ISI
SICI code
1070-664X(199908)6:8<3416:IOOMPO>2.0.ZU;2-#
Abstract
The characteristics of a microsecond plasma opening switch have been improv ed by the modification of the plasma source. Conventional cable plasma guns have been used in the experiments, producing different directions of the p lasma flow by changing the guns' nozzles. The nozzles were arranged to prov ide the plasma flow, which is not exactly radial, but has an angle to the g un axis. The experiments with the modified plasma guns were carried out wit h the upstream, downstream, and azimuthally slanted plasma flow directions. The results are compared to a conventional radial flow plasma source. The plasma flow slanted in an angle of 30 degrees downstream resulted in 50% im provement of the load current rise time and switch impedance. The obtained dependencies are explained in the frame of the snowplow model. Radial compo nent of the plasma velocity at the end of the conduction phase is higher fo r downstream plasma flow. This results in a faster opening of the switch an d is in good agreement with experimental data. (C) 1999 American Institute of Physics. [S1070-664X(99)02808-6].