Beam dynamics studies for the relativistic klystron two-beam accelerator experiment

Two-beam accelerators (TBAs) have been proposed as efficient power sources for next generation high-energy linear colliders. Studies have demonstrated the possibility of building TBAs from X-band (similar to8-12 GHz) through Ka-band (similar to 30-35 GHz) frequency regions. The relativistic klystron two-beam accelerator project, whose aim is to study TBAs based upon extend ed relativistic klystrons, is described, and a new simulation code is used to design the latter portions of the experiment. Detailed, self-consistent calculations of the beam dynamics and of the rf cavity output are presented and discussed together with a beam line design that will generate nearly 1 .2 GW of power from 40 rf cavities over a 10 m distance. The simulations sh ow that beam current losses are acceptable and that longitudinal and transv erse focusing techniques are sufficiently capable of maintaining a high deg ree of beam quality along the entire beam line.