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Proton Bunch Self-Modulation in Plasma with Density Gradient

Authors :: Eric Chevallay
V. A. Minakov
F. Keeble
Linbo Liang
Ans Pardons
F. Friebel
J. R. Henderson
M. A. Baistrukov
Stefano Mazzoni
M. Turner
Yu Li
F. Batsch
Ivo Furno
L. Verra
M. Granetzny
H. Saberi
Philip Burrows
V. Hafych
Carsten Welsch
J. T. Moody
M. Hüther
Guoxing Xia
Benjamin Woolley
M. Á. Kedves
P. Blanchard
P. V. Tuev
V. A. Verzilov
J. Chappell
M. Chung
Florian Kraus
R. I. Spitsyn
Ricardo Fonseca
T. Nechaeva
A. Perera
Olaf Grulke
M. Krupa
M. Aladi
R. Fiorito
S. Liu
Brennan Goddard
A. Helm
Nelson Lopes
I. Gorgisyan
Erik Adli
E. Senes
Ambrogio Fasoli
Patric Muggli
M. Zepp
S. Doebert
L. H. Deubner
Spencer Gessner
D. Medina Godoy
Rebecca Ramjiawan
M. Martyanov
S. Rey
Hartmut Ruhl
M. Moreira
Alan Howling
H. Panuganti
Amos Dexter
Simon Jolly
R. Jacquier
D. A. Cooke
Edda Gschwendtner
G. Zevi della Porta
G. P. Djotyan
T. Lefevre
M. Bergamaschi
J. Pucek
L. Garolfi
B. Williamson
Matthew Wing
H. Damerau
A. A. Gorn
V. N. Fedosseev
Eduardo Granados
I. Yu. Kargapolov
Francesco Velotti
Robert Apsimon
Sung Youb Kim
B. Buttenschön
O. Apsimon
Luis O. Silva
F. Braunmüller
B. Ráczkevi
Alexander Pukhov
Anthony Hartin
G. Demeter
M. D. Kelisani
John P. Farmer
Allen Caldwell
R. Agnello
Peter Sherwood
F. Peña Asmus
Jorge Vieira
A.-M. Bachmann
P. I. Morales Guzmán
Konstantin Lotov
J. Wolfenden
C. Davut
Oliver Schmitz
Alexey Petrenko
Y. Andrebe
Collaboration, AWAKE
Source :: Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP, AWAKE Collaboration 2020, ' Proton Bunch Self-Modulation in Plasma with Density Gradient ', Physical Review Letters, vol. 125, no. 26 . https://doi.org/10.1103/PhysRevLett.125.264801, Physical Review Letters, Braunmüller, F, Nechaeva, T, Adli, E, Agnello, R, Aladi, M, Andrebe, Y, Apsimon, O, Apsimon, R, Bachmann, A M, Baistrukov, M A, Batsch, F, Bergamaschi, M, Blanchard, P, Burrows, P N, Buttenschön, B, Caldwell, A, Chappell, J, Chevallay, E, Chung, M, Cooke, D A, Damerau, H, Davut, C, Demeter, G, Deubner, L H, Dexter, A, Djotyan, G P, Doebert, S, Farmer, J, Fasoli, A, Fedosseev, V N, Fiorito, R, Fonseca, R A, Friebel, F, Furno, I, Garolfi, L, Gessner, S, Goddard, B, Gorgisyan, I, Gorn, A A, Granados, E, Granetzny, M, Grulke, O, Gschwendtner, E, Hafych, V, Hartin, A, Helm, A, Henderson, J R, Howling, A, Hüther, M, Jacquier, R, Jolly, S, Kargapolov, I Y, Kedves, M, Keeble, F, Kelisani, M D, Kim, S Y, Kraus, F, Krupa, M, Lefevre, T, Li, Y, Liang, L, Liu, S, Lopes, N, Lotov, K V, Martyanov, M, Mazzoni, S, Medina Godoy, D, Minakov, V A, Moody, J T, Morales Guzmán, P I, Moreira, M, Muggli, P, Panuganti, H, Pardons, A, Peña Asmus, F, Perera, A, Petrenko, A, Pucek, J, Pukhov, A, Ráczkevi, B, Ramjiawan, R L, Rey, S, Ruhl, H, Saberi, H, Schmitz, O, Senes, E, Sherwood, P, Silva, L O, Spitsyn, R I, Tuev, P V, Turner, M, Velotti, F, Verra, L, Verzilov, V A, Vieira, J, Welsch, C P, Williamson, B, Wing, M, Wolfenden, J, Woolley, B, Xia, G, Zepp, M & Zevi Della Porta, G 2020, ' Proton Bunch Self-Modulation in Plasma with Density Gradient ', Physical Review Letters, vol. 125, no. 26, 264801 . https://doi.org/10.1103/PhysRevLett.125.264801
Publication Year :: 2020
Publisher :: American Physical Society (APS), 2020.
Abstract: We study experimentally the effect of linear plasma density gradients on the self-modulation of a 400\,GeV proton bunch. Results show that a positive/negative gradient in/decreases the number of micro-bunches and the relative charge per micro-bunch observed after 10\,m of plasma. The measured modulation frequency also in/decreases. With the largest positive gradient we observe two frequencies in the modulation power spectrum. Results are consistent with changes in wakefields' phase velocity due to plasma density gradient adding to the slow wakefields' phase velocity during self-modulation growth predicted by linear theory.<br />Comment: 14 pages, 4 figures