LASER-TRIGGERED SWITCH STUDY.
Abstract
The feasibility of developing a laser-triggered switch for use in line-type modulator service at a voltage holdoff level of 300 KV and at a conduction current level of 1000 amperes is being investigated. To date, current peaks as high as 2000 amperes have been easily obtained. Using anode arcs (the emitter at a positive potential with respect to the collector), a delay of approximately one microsecond occurs between the time when the laser illumination impinges on the emitter surface and the time when the switch turns on. The actual turn-on time has been observed to be about 100 nanoseconds. This turn-on time was inductance limited by the external circuitry in experiments performed to date. However, a fast-rise-time (< 10 nanoseconds) pulse forming network has been constructed and will be used for future experiments. Pulse-length data obtained to date indicate that operation in the 1 to 100 microsecond pulse-length range is easily achievable. Emitter-life tests have shown that the life of the laser-triggered switch should be in excess of 1000 hours. All equipment, materials and parts required for the high-voltage holdoff tests to be performed during this contract have been ordered or received. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1966
- Accession Number
- AD0802458
Entities
People
- A. S. Gilmour
- R. E. Biss
- R. J. Clark
Organizations
- Calspan