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TY - UNPB AU - Gessner, S.J. AU - Adli, E. AU - Allen, J.M. AU - An, W. AU - Clarke, C.I. AU - Clayton, C.E. AU - Delahaye, J.-P. AU - Downer, M. AU - Frederico, J.T. AU - Green, S.Z. AU - Hogan, M.J. AU - Joshi, C. AU - Lipkowitz, N. AU - Litos, M.D. AU - Lu, W. AU - Marsh, K.A. AU - Mori, W.B. AU - Muggli, P. AU - Schmeltz, M.P. AU - Vafaei-Najafabadi, N. AU - Walz, D.R. AU - Yakimenko, V. AU - Yocky, G. AU - Zgadzaj, R. ED - Henderson, Stuart ED - Akers, Evelyn ED - Satogata, Todd ED - Schaa, Volker R.W. TI - Multi-GeV Electron and Positron Plasma Wakefield Acceleration Results at FACET J2 - Proc. of IPAC2015, Richmond, VA, USA, May 3-8, 2015 C1 - Richmond, VA, USA T2 - International Particle Accelerator Conference T3 - 6 LA - english AB - The FACET accelerator test facility at SLAC hosts a new generation of Plasma Wakefield Acceleration (PWFA) experiments. "Two-bunch" experiments have demonstrated high-gradient, highly efficient energy transfer in a plasma wakefield. I will discuss results of follow-up experiments that use a 1.3 meter long plasma to accelerate witness bunch electrons to even higher energies. In a first, we observed multi-GeV acceleration of positrons in a plasma. This is a critical step in demonstrating the applicability of PWFA for High-Energy Physics applications. PB - JACoW CP - Geneva, Switzerland ER -