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High energy electron beams (30–150 keV) are widely used as intense heat source in welding, melting and evaporation of refractory metals. These operations are mostly carried out in high vacuum (10−4–10−5 mbar) to aid unimpeded flow of electrons from generation to the point of application. A 30 kV, 60 kW Electron beam optical column (EOC) is designed and developed under the high power beam technology...
Based on the study of explosive emission, the dielectric enhanced electric-field emission model is brought forward, and the metal-dielectric complex cathode material is manufactured. Based on the investigation of surface-flashover explosive emission, the graphite-carbon fiber complex cathode is manufactured too. Then the experiments are developed respectively, and the results show the electron emission...
Cathode units of high power radio-frequency tubes are conventionally used in electron injectors with high repetition rate. This cathode utilization results in disturbance of the temperature regime of the cathode surface because of cutting the anode, which is “thermal mirror” in the tube. Estimations made in this work show an essential lowering of the emitter temperature for both porous metal and oxide...
The Institute carries out the studies or the so-culled "gas-dynamic" acceleration seheme suggested. in the paper /1/.∗ This scheme is characterized by that the electron accelerator operates in "natural" (negative) polarity regime and ion acceleration occurs under the action of the electric field of oscillating electrons into the equipoiontial drift space situated at the outer side...
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