O.S. Karger, G.G. Manahan, A. Knetsch, G. Wittig, P. Scherkl, T. Heinemann, A.F. Habib, G. Hurtig, P. Delinikolas, A. Beaton, S. Kuschel, M. Kaluza, M. Zepf, D.L. Bruhwiler, J. Smith, G. Andonian, A. Murokh and B. Hidding, “Beam energy and quality transformer: Using LWFA electron beams for PWFA,” presented at the Advanced Accel. Concepts Workshop (National Harbor, Aug. 2016).