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This paper describes a particular design of a Pierce gun and a compact PPM focusing system for 108GHz serpentine TWT applications. Design strategies are proposed by providing closed formulas and dimensioning techniques. The influence of focusing electrode dimension has been presented in gun structure design. The optimum value of magnetic induction has been discussed in PPM structure design. Using...
This paper introduces the design method of the electron optical system for a 0.22THz folded waveguide traveling wave tube. As the electron beam current is 10mA and the beam channel radius of the tube is only about 0.1mm, the PPM(period permanent magnet) focusing system needs to be carefully designed to transmit this beam current from the electron gun to the collector. A tree-electrode Pierce gun is...
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