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1 results

  • High Power Crossed-Field Amplifier for Material Processing

  • M. S. Worthington, Guilford R. MacPhail
  • Journal:
    MRS Online Proceedings Library Archive / Volume 347 / 1994
    Published online by Cambridge University Press:
    15 February 2011, 131
    Print publication:
    1994

  • The use of microwave energy for industrial processing applications has been ongoing since the early 1950's. A number of high power tubes were developed in the mid-1960's at 805, 915 and 2,450 MHz for industrial uses. One super power crossed-field amplifier (CFA), the QKS1262, was available in either 50 or 100 kW continuous wave (CW) format. This CFA was designed with a platinum emitter which was pulse started with 100 W average power. The CFA operates at ∼20 kV at 5 amps (50 kW - CW output) or 10 amps (100 kW - CW output/65% efficiency).

    This paper will describe the operating characteristics of the QKS1262 and the options in design to attain high power with high efficiency and long life (25,000 hours).