Experimental study of wakefields driven by a self-modulating proton bunch in plasma von Turner, M, Muggli, P, Adli, E, Agnello, R, Aladi, M, Andrebe, Y, Apsimon, O, Apsimon, R, Bachmann, A-M, Baistrukov, MA, Batsch, F, Bergamaschi, M, Blanchard, P, Burrows, PN, Buttenschoen, B, Caldwell, A, Chappell, J, Chevallay, E, Chung, M, Cooke, DA, Damerau, H, Davut, C, Demeter, G, Deubner, LH, Dexter, A, Djotyan, GP, Doebert, S, Farmer, J, Fasoli, A, Fedosseev, VN, Fiorito, R, Fonseca, RA, Friebel, F, Furno, I, Garolfi, L, Gessner, S, Goddard, B, Gorgisyan, I, Gorn, AA, Granados, E, Granetzny, M, Grulke, O, Gschwendtner, E, Hafych, V, Hartin, A, Helm, A, Henderson, JR, Howling, A, Huether, M, Jacquier, R