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Active Millimeter-Wave Accelerator with Parallel Beams


We introduce a new concept for a miniature particle accelerator based on an active millimeter-wave circuit permitting a high gradient on nanosecond time-scales with much-reduced peak power and temperature cycling. We characterize the system using a transmission line model, and examine the transient features of operation as a coupled-cavity circuit including beam-loading. For illustration we consider an electromagnetic design for a seven-cell 91.4 GHz accelerator matched to standard waveguide, and a switch formed with a photoconductor in an H-plane tee geometry.

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