Observation of Enhanced Transformer Ratio in Collinear Wakefield Acceleration
- Euclid Techlabs, LLC, Solon, OH-44139 (United States)
- High Energy Physics Division, Argonne National Laboratory, Argonne, IL-60439 (United States)
The transformer ratio R is a parameter that characterizes the efficiency of the energy transferred from the drive beam to the trailing witness beam passing through a wakefield accelerating structure (all metal or dielectric based) or a plasma chamber. Using a ramped bunch train (RBT) rather than a single drive bunch, the enhanced transformer ratio (ETR) technique is able to increase the transformer ratio R above the ordinary limit of 2 for a single bunch in a collinear wakefield accelerator. The RBT is a train of electron bunches separated by half integer multiples wavelength of the wakefield. The charge of the leading bunch is lowest and subsequent bunch charges are increased in such a way as to maximize R. In this article, an experimental study of this scheme is presented in which an RBT of 2 bunches with charge ratio of 1:2.5 and bunch length {sigma}z = 2 mm were used to enhance the transformer ratio. Measurement results and data analysis show good agreement with theoretical predictions. The ETR technique demonstrated here can be used in any collinear wakefield accelerator configuration, either structure- or plasma-based.
- OSTI ID:
- 20898716
- Journal Information:
- AIP Conference Proceedings, Vol. 877, Issue 1; Conference: 12. advanced accelerator concepts workshop, Lake Geneva, WI (United States), 10-15 Jul 2006; Other Information: DOI: 10.1063/1.2409177; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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