Document details

Proton bunch self-modulation in plasma with density gradient

Author(s): Braunmuller, F. ; Nechaeva, T. ; Adli, E. ; Agnello, R. ; Aladi, M. ; Andrebe, Y. ; Apsimon, O. ; Apsimon, R. ; Bachmann, A. -M. ; Baistrukov, M. A. ; Batsch, F. ; Wing, M. ; Wolfenden, J. ; Woolley, B. ; Xia, G. X. ; Zepp, M. ; Della Porta, G. Z. ; 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. W. ; Kargapolov, I. Y. ; Kedves, M. Á. ; Keeble, F. ; Kelisani, M. D. ; Kim, S. -Y. ; Krausz, F. ; Krupa, M. ; Lefevre, T. ; Militsyn, B. L. ; Liang, L. ; Liu, S. ; Lopes, N. C. ; Lotov, K. V. ; Martyanov, M. ; Mazzoni, S. ; Godoy, D. M. ; Minakov, V. A. ; Moody, J. T. ; Morales Guzmán, P.  I. ; Moreira, M. T. ; Muggli, P. ; Panuganti, H. ; Pardons, A. ; Peña Asmus, F. ; Perera, A. ; Petrenko, A. ; Pucek, J. ; Pukhov, A. ; Ráczkevi, B. ; Ramjiawan, R. L. ; Norreys, P. ; 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.

Date: 2020

Persistent ID: http://hdl.handle.net/10071/21411

Origin: Repositório ISCTE


Description

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 or negative gradient increases or decreases the number of microbunches and the relative charge per microbunch observed after 10 m of plasma. The measured modulation frequency also increases or 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 gradients adding to the slow wakefields' phase velocity during self-modulation growth predicted by linear theory.

Document Type Journal article
Language English
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