Both in the laboratory and in animal experiments, the first MAC demonstrated noncontact ignition and operation, a low flow rate, and safety and efficacy at all wattage settings applied. It arrested ulcerative bleeding and ablated the mucosal surface at various depths according to the applied power. The MAC may be a solution to the lack of a consistent and reliable means for coagulation in needlescopic or minilaparoscopic surgery.
An axially extracted virtual cathode oscillator driven by a 4 MV, 80 kA elecron beam has been used to generate microwave pulses with an average peak power of 7.5 GW at a frequency of 1.17 GHz. Peak power efficiency was 5.3% and energy efficiency was 2.3%.
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