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TY - CONF AU - Roussel, R.J. AU - Andonian, G. AU - Conde, M.E. AU - Doran, D.S. AU - Ha, G. AU - Lynn, W.J. AU - Power, J.G. AU - Rosenzweig, J.B. AU - Seok, J. AU - Whiteford, C. AU - Wisniewski, E.E. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Transformer Ratio Measurements from Ramped Beams in the Plasma Blowout Regime using Emittance Exchange J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - We present initial measurements from a UCLA-Argonne Wakefield Accelerator collaborative plasma wakefield acceleration (PWFA) experiment aimed at demonstrating the dependence of transformer ratio on longitudinal beam shape. The transformer ratio or the ratio between the maximum acceleration of the witness and the maximum deceleration of the drive beam, is key to a mature, beam-based, plasma wakefield accelerator design. Utilizing the unique capabilities of the emittance exchange (EEX) beamline, we may obtain transformer ratios in excess of six in PWFA. We present the experimental beamline design, relevant beam diagnostics and explore preservation of the longitudinal beam profile. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3778 EP - 3781 KW - plasma KW - wakefield KW - emittance KW - experiment KW - acceleration DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW088 UR - http://jacow.org/ipac2019/papers/thpgw088.pdf ER -