Short Pulse High Voltage Systems
The design features of current high speed pulse generators will be outlined. Existing single machines can provide more than 1013 watts at voltages above 10 million volts. Likely extensions of present design techniques to provide similar or higher wattages at a couple of million volts will be mentioned. One of the earlier limitations to the rise time of the pulses produced by the machines was the main output gap. The development of multi-channel switching will be briefly reviewed and the present position in this will be given. The inductance of the vacuum envelope and its immediate feeds presents another limit to the pulse rise time in low impedance systems and some present day limits will be indicated. Within the diode the energy can be carried by a vacuum insulated feed and some limits and solutions to the power flow that can be sustained will be discussed. Further convergence of the power flow can then be obtained by using electron beams, such as by pinches within the diode or by neutralised electron beam transportation. The present power fluxes achievable at the various stages of convergences will be indicated. The history of the development of high wattage systems of various voltages will be indicated in order to give some idea of what may be achievable in the near future. In conclusion some brief comments will be made about the possibilities and difficulties of longer pulse systems and also about those with multishot capabilities to achieve significant mean power levels.
KeywordsTrigger Pulse Large Machine Vacuum Diode Pulse Rise Time Marx Generator
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Machines And Beams
- Papers in 10th, 11th and 12th Symp. on Electron Ion and Laser Beam Tech., May 1969, 1971 and 1973. Pbi. San Francisco Press Inc.Google Scholar
- Also papers in IEEE Trans. Nucl. Sci. NS18 No. 3 and NS20 No. 3.Google Scholar
- The above references cover most of the machines in the 50 to 100 ns pulse duration class built in the United States and much of the technology involved.Google Scholar
- For recent 20 ns beam and machine work, the paper “Electron Beam Induced Pellet Fusion” Ci.Yonas, Sandia Report 74–5367, is relevant.Google Scholar