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abstract:
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Slab-symmetric dielectric-loaded structures, consisting of a vacuum gap between
dielectric-lined conducting walls, have become a subject of interest for short-wavelength
acceleration due to their simplicity, relatively low power density, and advantageous beam
dynamics. Such a structure can be resonantly excited by an external power source and is known
to strongly suppress transverse wakefields. Motivated by the prospect of a high-power FIR
radiation source, currently under construction at UCLA, we investigate a high-gradient slab-
symmetric accelerator powered by up to 100 MW of laser power at 340 um, with a predicted
gradient near 100 MeV/m. Three-dimensional simulation studies of the structure fields and
wakes are presented and compared with theory, and a future experiment is discussed.
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