Controlled Growth of the Self-Modulation of a Relativistic Proton Bunch in Plasma.

  title={Controlled Growth of the Self-Modulation of a Relativistic Proton Bunch in Plasma.},
  author={L. Verra and G. Zevi Della Porta and Jan Pů{\vc}ek and Tatiana Nechaeva and Samuel Wyler and M. Bergamaschi and Eugenio Senes and Emil Guran and J. T. Moody and M{\'a}t{\'e} Kedves and E. Gschwendtner and Patric Muggli and Riccardo Agnello and C. C. Ahdida and M. C. Amoedo Goncalves and Y. Andr{\`e}be and Oznur Mete Apsimon and Robert J. Apsimon and Jordan Matias Arnesano and A. M. Bachmann and D. Barrientos and F. Batsch and Vittorio Bencini and Patrick Blanchard and Philip Nicholas Burrows and Birger Buttensch{\"o}n and Allen Christopher Caldwell and J. Chappell and Eric Chevallay and Moses Chung and David A. Cooke and Can Davut and G{\'a}bor Demeter and Amos Christopher Dexter and S. Doebert and Francesa Ann Elverson and J P Farmer and Ambrogio Fasoli and Valentin Fedosseev and Ricardo A. Fonseca and Ivo Furno and A. A. Gorn and Eduardo Granados and Marcel Granetzny and Tim Graubner and Olaf Grulke and Vasyl Hafych and James T. Henderson and Mathias H{\"u}ther and V K Khudiakov and S.-Y. Kim and Florian Kraus and Michal Krupa and T. Lefevre and Linbo Liang and S. C. Liu and Nelson C. Lopes and K. V. Lotov and Miguel Martinez Calderon and Stefano Mazzoni and D. Medina Godoy and K. Moon and P. I. Morales Guzm{\'a}n and Mariana Moreira and Elzbieta Nowak and C. Pakuza and H. Panuganti and A. Pardons and Kevin Pepitone and Aravinda Perera and A. Pukhov and Rebecca Ramjiawan and Stephane Rey and O. Schmitz and Fernando Silva and L O Silva and C. Stollberg and A. Sublet and C. Swain and Athanasios Topaloudis and N. Torrado and Petr Tuev and Francesco Maria Velotti and Victor Verzilov and Jorge Vieira and Martin S. Weidl and C. P. Welsch and Manfred Wendt and M. Wing and Joseph Wolfenden and Benjamin Woolley and Guoxing Xia and Vlada Yarygova and Marianne Zepp},
  journal={Physical review letters},
  volume={129 2},
A long, narrow, relativistic charged particle bunch propagating in plasma is subject to the self-modulation (SM) instability. We show that SM of a proton bunch can be seeded by the wakefields driven by a preceding electron bunch. SM timing reproducibility and control are at the level of a small fraction of the modulation period. With this seeding method, we independently control the amplitude of the seed wakefields with the charge of the electron bunch and the growth rate of SM with the charge… 

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