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TY - CONF AU - Gao, Q. AU - Antipov, S.P. AU - Chen, H.B. AU - Conde, M.E. AU - Doran, D.S. AU - Gai, W. AU - Jing, C.-J. AU - Liu, W. AU - Power, J.G. AU - Shi, J. AU - Whiteford, C. AU - Wisniewski, E.E. ED - Schaa, Volker RW ED - Power, Maria ED - Shiltsev, Vladimir ED - White, Marion TI - Transformer Ratio Enhancement Experiment Based on Emittance Exchanger in Argonne Wakefield Accelerator J2 - Proc. of NAPAC2016, Chicago, IL, USA, October 9-14, 2016 C1 - Chicago, IL, USA T2 - North American Particle Accelerator Conference T3 - 3 LA - english AB - The transformer ratio is an important figure of merit in collinear wakefield acceleration, it indicates the efficiency of energy transferring from drive bunch to witness bunch. Higher transformer ratio will significantly reduce the length of accelerator thus reducing the cost of accelerator construction. However, for the gaussian bunch, this ratio has its limit of 2. To obtain higher transformer ratio, one possible method is to tailor the beam current profile to specific shapes. One method of beam shaping is based on emittance exchange, which has been demonstrated at the Argonne Wakefield Accelerator. Its principle is to tailor the beam transversely using a mask then exchange the beam's transverse profile and longitudinal profile. In this paper, we describe our efforts to optimize the beamline and mask in order to generate a triangular beam with quadratic head, which has a transformer ratio of 6.4. We also present our design of a dielectric slab based accelerating structure to measure the transformer ratio. Finally, we discuss an experiment for this high transformer ratio at Argonne Wakefield Accelerator Laboratory. PB - JACoW CP - Geneva, Switzerland SP - 1115 EP - 1118 KW - ion KW - wakefield KW - experiment KW - GUI KW - emittance DA - 2017/01 PY - 2017 SN - 978-3-95450-180-9 DO - 10.18429/JACoW-NAPAC2016-THPOA08 UR - https://jacow.org/napac2016/papers/thpoa08.pdf ER -