AWAKE: A Proton-Driven Plasma Wakefield Acceleration Experiment at CERN by Bracco, C, Amorim, L, Assmann, R, Batsch, F, Bingham, R, Burt, G, Buttenschön, B, Butterworth, A, Caldwell, A, Chattopadhyay, S, Cipiccia, S, Deacon, L, Doebert, S, Dorda, U, Feldbaumer, E, Fonseca, R, Fedossev, V, Goddard, B, Grebenyuk, J, Grulke, O, Gschwendtner, E, Hansen, J, Hessler, C, Hofle, W, Holloway, J, Jaroszynski, D, Jenkins, M, Jensen, L, Jolly, S, Jones, R, Kasim, M, Lopes, N, Lotov, K, Mandry, S, Martyanov, M, Meddahi, M, Mete, O, Minakov, V, Moody, J, Muggli, P, Najmudin, Z, Norreys, P, Öz, E, Pardons, A, Petrenko, A, Pukhov, A, Rieger, K, Reimann, O, Seryi, A, Shaposhnikova, E, Sherwood, P, Silva, L, Sosedkin, A, Tarkeshian, R, Trines, R, Velotti, F, Vieira, J, Vincke, H, Welsch, C, Wing, M, Xia, G