Speaker
Description
Tetrode vacuum tubes are used under the positive grid region
to accelerate a high intensity beam in the RCS.
A tube amplifier is operated in push-pull mode and two tubes are installed in the amplifier. Although each control grid should be driven in counterphase for the push-pull operation, the waveform becomes asymmetric by the positive grid biasing. The vacuum tube operation analysis should include such an effect caused by the positive grid biasing. The analysis becomes complicated because the anode current and
the control grid voltage waveforms interact each other under the heavy
beam loading. The effects caused by the positive grid voltage are analyzed with the self-consistency. We will describe the analysis result under the positive grid biasing.
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