CERN Accelerating science

Article
Title	Planned Enhanced Wakefield Transformer Ratio Experiment at Argonne Wakefield Accelerator
Author(s)	Kanareykin, Alex ; Avrakhov, Pavel V ; Gai, Wei ; Jing, Chunguang ; Konecny, Richard ; Power, John G
Affiliation	(ANL, Argonne, Illinois) ; (Euclid Concepts, LLC, Solon, Ohio) ; (LPI, Moscow)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.3487
Subject category	Accelerators and Storage Rings
Abstract	In this paper, we present a preliminary experimental study of a wakefield accelerating scheme that uses a carefully spaced and current ramped electron pulse train to produce wakefields that increases the transformer ratio much higher than 2. A dielectric structure was designed and fabricated to operate at 13.625 GHz with dielectric constant of 15.7. The structure will be initially excited by two beams with first and second beam charge ratio of 1:3. The expected transformer ratio is 3 and the setup can be easily extend to 4 pulses which leads to a transformer ratio of more than 6. The dielectric structure cold test results show the tube is within the specification. A set of laser splitters was also tested to produce ramped bunch train of 2 - 4 pulses. Overall design of the experiment and initial results will be presented.