J. Phys. Colloques
Volume 40, Numéro C7, Juillet 1979XIVe Conférence Internationale sur les Phénomènes d'Ionisation dans les Gaz / XIVth International Conference on Phenomena in Ionized Gases
|Page(s)||C7-483 - C7-484|
J. Phys. Colloques 40 (1979) C7-483-C7-484
LASER/FIBER OPTIC BREAKDOWN OF A PULSE CHARGED 90% Ar-10% N2 GAS SWITCHL.L. Hatfield1, H.C. Harjes2, M. Kristiansen2, A.H. Guenther2 et K.H. Schönback3
1 Department Physics
2 Department Elec. Eng. Texas Technical University, Lubbock, Texas U.S.A. 79409
3 Technische Hochschule Darmstadt, F.R.G.
Precise laser initiation of the breakdown in a pulse charged gas switch is described. A novel feature is the transport of the 40 ns triggering laser pulse through a 1.5 m long 1 mm diameter optical fiber. Optimization of gas breakdown characteristics was necessary as a result of the limited power transported through the fiber. Low, nanosecond delay and jitter were achieved at reduced fields approaching 180 V/cm-Torr in the overvolted gas gap through the use of 90% argon/10% nitrogen gas mixtures. The influence of laser power, gas mixture, focal point location, pressure, time of laser insertion etc. on switch performance is presented.