Simulation and Experimental Study of Proton Bunch Self-Modulation in Plasma with Linear Density Gradients
Abstract
We present numerical simulations and experimental results of the self-modulation of a long proton bunch in a plasma with linear density gradients along the beam path. Simulation results agree with the experimental results reported in arXiv:2007.14894v2: with negative gradients, the charge of the modulated bunch is lower than with positive gradients. In addition, the bunch modulation frequency varies with gradient. Simulation results show that dephasing of the wakefields with respect to the relativistic protons along the plasma is the main cause for the loss of charge. The study of the modulation frequency reveals details about the evolution of the self-modulation process along the plasma. In particular for negative gradients, the modulation frequency across time-resolved images of the bunch indicates the position along the plasma where protons leave the wakefields. Simulations and experimental results are in excellent agreement.
Cite
@article{arxiv.2107.11369,
title = {Simulation and Experimental Study of Proton Bunch Self-Modulation in Plasma with Linear Density Gradients},
author = {P. I. Morales Guzmán and P. Muggli and R. Agnello and C. C. Ahdida and M. Aladi and M. C. Amoedo Goncalves and Y. Andrebe and O. Apsimon and R. Apsimon and A. -M. Bachmann and M. A. Baistrukov and F. Batsch and M. Bergamaschi and P. Blanchard and F. Braunmüller and P. N. Burrows and B. Buttenschön and A. Caldwell and J. Chappell and E. Chevallay and M. Chung and D. A. Cooke and H. Damerau and C. Davut and G. Demeter and A. Dexter and S. Doebert and J. Farmer and A. Fasoli and V. N. Fedosseev and R. Fiorito and R. A. Fonseca and I. Furno and S. Gessner and A. A. Gorn and E. Granados and M. Granetzny and T. Graubner and O. Grulke and E. Gschwendtner and E. D. Guran and V. Hafych and J. R. Henderson and M. Hüther and M. Á. Kedves and V. Khudyakov and S. -Y. Kim and F. Kraus and M. Krupa and T. Lefevre and L. Liang and N. Lopes and K. V. Lotov and M. Martyanov and S. Mazzoni and D. Medina Godoy and J. T. Moody and K. Moon and M. Moreira and T. Nechaeva and E. Nowak and C. Pakuza and H. Panuganti and A. Pardons and A. Perera and J. Pucek and A. Pukhov and B. Ráczkevi and R. L. Ramjiawan and S. Rey and O. Schmitz and E. Senes and L. O. Silva and C. Stollberg and A. Sublet and A. Topaloudis and N. Torrado and P. V. Tuev and M. Turner and F. Velotti and L. Verra and J. Vieira and H. Vincke and C. P. Welsch and M. Wendt and M. Wing and J. Wolfenden and B. Woolley and G. Xia and M. Zepp and G. Zevi Della Porta},
journal= {arXiv preprint arXiv:2107.11369},
year = {2021}
}
Comments
13 pages, 11 figures