Planned Enhanced Wakefield Transformer Ratio Experiment at Argonne Wakefield Accelerator

In this paper, we present a preliminary experimental study of a wakefield accelerating scheme that uses an electron pulse train to produce wakefields that increases the transformer ratio greater than 2 by appropriate bunch spacing and current ramp. A dielectric structure was designed and fabricated to operate at 13.625 GHz with dielectric constant of 16. The structure will be excited by two beams with the first and second beam charge ratio of 1: 3 for the initial experiment. The expected transformer ratio is 3 and the setup can be easily extended to the case of 4 pulses which develops a transformer ratio of more than 7. Dielectric structure cold test results show that the tube is within the specifications. A set of laser splitters was also tested to produce ramped bunch train of 2 pulses. Overall design of the experiment and initial results will be presented.