50-kA Coaxial Orientation Independent Ignitron
Abstract
The Orientation Independent Ignitron (OII) switch provides the same electrical function as a conventional mercury pool ignitron, but maintains the mercury wetted to a molybdenum cathode surface, and is thereby independent of the switch orientation. Hughes is developing a coaxial OII switch configuration with nominal ratings of 50 kA and 25 kV to evaluate its potential use in electric-gun power modulators. The ratings for peak current and Coulomb transfer of the OII switch depend on the design of the cathode and the quantity of mercury that can be maintained on the wetted surface. Repetition rate is governed by the thermal control employed. Design criteria for achieving requirements on peak current, Coulomb transfer and repetition frequency have been reported previously. This paper describes our most recent experiments for assessing switch performance and electrode wear as a function of the OII switch operating conditions. Experiments were performed with a prototype switch that was designed to permit partial disassembly and reprocessing. Test results are compared with design projections, and prospects for scaling to higher current, larger coulomb transfer and/or higher repetition rates are discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1993
- Accession Number
- ADA638710
Entities
People
- B. Long
- D. M. Goebel
- H. Rhinehart
- J. G. Elverum
- R. G. Fleig
- R. L. Poeschel
Organizations
- HRL Laboratories