Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients
Guzman, P. I. Morales; Muggli, P.; Agnello, R.; Ahdida, C. C.; Aladi, M.; Goncalves, M. C. Amoedo; Andrebe, Y.; Apsimon, O.; Apsimon, R.; Bachmann, A-M; Baistrukov, M. A.; Batsch, F.; Bergamaschi, M.; Blanchard, P.; Braunmuller, F.; Burrows, P. N.; Buttenschon, B.; Caldwell, A.; Chappell, J.; Chevallay, E.; Chung, M.; Cooke, D. A.; Damerau, H.; Davut, C.; Demeter, G.; Dexter, A.; Doebert, S.; Farmer, J.; Fasoli, A.; Fedosseev, V. N.; Fiorito, R.; Fonseca, R. A.; Furno, I; Gessner, S.; Gorn, A. A.; Granados, E.; Granetzny, M.; Graubner, T.; Grulke, O.; Gschwendtner, E.; Guran, E. D.; Hafych, V; Henderson, J. R.; Huether, M.; Kedves, M. A.; Khudyakov, V; Kim, S-Y; Kraus, F.; Krupa, M.; Lefevre, T.; Liang, L.; Lopes, N.; Lotov, K., V; Martyanov, M.; Mazzoni, S.; Godoy, D. Medina; Moody, J. T.; Moon, K.; Moreira, M.; Nechaeva, T.; Nowak, E.; Pakuza, C.; Panuganti, H.; Pardons, A.; Perera, A.; Pucek, J.; Pukhov, A.; Raczkevi, B.; Ramjiawan, R. L.; Rey, S.; Schmitz, O.; Senes, E.; Silva, L. O.; Stollberg, C.; Sublet, A.; Topaloudis, A.; Torrado, N.; Tuev, P., V; Turner, M.; Velotti, F.; Verra, L.; Vieira, J.; Vincke, H.; Welsch, C. P.; Wendt, M.; Wing, M.; Wolfenden, J.; Woolley, B.; Xia, G.; Zepp, M.; Della Porta, G. Zevi
2021

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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 [F. Braunmller, T. Nechaeva et al. (AWAKE Collaboration), Phys. Rev. Lett. 125, 264801 (2020)]: 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.

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Title Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients
Author(s) Guzman, P. I. Morales ; Muggli, P. ; Agnello, R. ; Ahdida, C. C. ; Aladi, M. ; Goncalves, M. C. Amoedo ; Andrebe, Y. ; Apsimon, O. ; Apsimon, R. ; Bachmann, A-M ; Baistrukov, M. A. ; Batsch, F. ; Bergamaschi, M. ; Blanchard, P. ; Braunmuller, F. ; Burrows, P. N. ; Buttenschon, B. ; Caldwell, A. ; Chappell, J. ; Chevallay, E. ; Chung, M. ; Cooke, D. A. ; Damerau, H. ; Davut, C. ; Demeter, G. ; Dexter, A. ; Doebert, S. ; Farmer, J. ; Fasoli, A. ; Fedosseev, V. N. ; Fiorito, R. ; Fonseca, R. A. ; Furno, I ; Gessner, S. ; Gorn, A. A. ; Granados, E. ; Granetzny, M. ; Graubner, T. ; Grulke, O. ; Gschwendtner, E. ; Guran, E. D. ; Hafych, V ; Henderson, J. R. ; Huether, M. ; Kedves, M. A. ; Khudyakov, V ; Kim, S-Y ; Kraus, F. ; Krupa, M. ; Lefevre, T. ; Liang, L. ; Lopes, N. ; Lotov, K., V ; Martyanov, M. ; Mazzoni, S. ; Godoy, D. Medina ; Moody, J. T. ; Moon, K. ; Moreira, M. ; Nechaeva, T. ; Nowak, E. ; Pakuza, C. ; Panuganti, H. ; Pardons, A. ; Perera, A. ; Pucek, J. ; Pukhov, A. ; Raczkevi, B. ; Ramjiawan, R. L. ; Rey, S. ; Schmitz, O. ; Senes, E. ; Silva, L. O. ; Stollberg, C. ; Sublet, A. ; Topaloudis, A. ; Torrado, N. ; Tuev, P., V ; Turner, M. ; Velotti, F. ; Verra, L. ; Vieira, J. ; Vincke, H. ; Welsch, C. P. ; Wendt, M. ; Wing, M. ; Wolfenden, J. ; Woolley, B. ; Xia, G. ; Zepp, M. ; Della Porta, G. Zevi
Published in Physical Review Accelerators And Beams
Volume 24
Issue 10
Pages 101301
Date 2021-10-01
ISSN 2469-9888
DOI https://doi.org/10.1103/PhysRevAccelBeams.24.101301
Other identifier(s) View record in Web of Science
Laboratories SPC
Record Appears in Scientific production and competences > SB - School of Basic Sciences > SPC - Swiss Plasma Center > SPC - Swiss Plasma Center
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date 2021-10-23

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