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High-Gradient Cavity Beat-Wave Accelerator at W-Band
Pulsed rf heating is a fundamental limit on high-gradient acceleration
in copper structures. Reduction of pulsed heating is favored by a
short exposure time for the copper; yet in conventional accelerators,
efficiency requires an exposure time of order a cavity fill time. At
W-Band, the cavity beat-wave transformer concept permits efficient
energy transfer to resonant accelerating modes on a sub-nanosecond
time-scale. We re-examine this acceleration scheme as it appears at
W-Band, with attention to drive beam dynamics.
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