Design of waveguide damped cells for 12 GHz high gradient accelerating structures

This document describes the design procedure and numerical techniques used to optimize waveguidedamped traveling wave accelerating structure cells for high gradients, and characterize their wakefields. All simulations where made using ACE3P. The document also contains the design data for a collection of such cells operating at accelerating mode frequency = 11.9942 GHz and 120° phase-advance. This collection of highly optimized cells is created for use with the fast RF structure parameter estimator CLICopti, which is used for CLIC rebaselining