Dual Mode Gun Development (Phase I).
Final rept. 17 Sep 71-28 Feb 73,
TELEDYNE MEC PALO ALTO CA
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The major limitation on dual mode tube performance in a TWT is caused by the large gain change that accompanies power change when beam current is varied. A technique is described to reduce this by altering the beam size and current distribution as the total current magnitude is varied. Small signal gain calculations are described for a variety of solid and hollow beam sizes, voltages and currents. The effect of varying cathode voltage is calculated and results are presented for both high and low perveance beams. Based on the theoretical calculations two electron guns were designed and built. Current density distribution from these guns was measured in an electron beam analyzer and focusing of the beam produced by one of the guns was measured in a beam tester. Author
- Electrical and Electronic Equipment
- Electricity and Magnetism