Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma

Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma

We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. We show experimentally that, with sufficient initial amplitude [≥(4.1±0.4)  MV/m], the phase of the modulation along the bunch is reproducible f...

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Veröffentlicht in:Physical review letters 2021-04, Vol.126 (16), p.164802-164802, Article 164802
Hauptverfasser: Batsch, F, Muggli, P, Agnello, R, Ahdida, C C, Amoedo Goncalves, M C, Andrebe, Y, Apsimon, O, Apsimon, R, Bachmann, A-M, Baistrukov, M A, Blanchard, P, Braunmüller, F, Burrows, P N, Buttenschön, B, Caldwell, A, Chappell, J, Chevallay, E, Chung, M, Cooke, D A, Damerau, H, Davut, C, Demeter, G, Deubner, H L, Doebert, S, Farmer, J, Fasoli, A, Fedosseev, V N, Fiorito, R, Fonseca, R A, Friebel, F, Furno, I, Garolfi, L, Gessner, S, Gorgisyan, I, Gorn, A A, Granados, E, Granetzny, M, Graubner, T, Grulke, O, Gschwendtner, E, Hafych, V, Helm, A, Henderson, J R, Hüther, M, Kargapolov, I Yu, Kim, S-Y, Kraus, F, Krupa, M, Lefevre, T, Liang, L, Liu, S, Lopes, N, Lotov, K V, Martyanov, M, Mazzoni, S, Medina Godoy, D, Minakov, V A, Moody, J T, Moon, K, Morales Guzmán, P I, Moreira, M, Nechaeva, T, Nowak, E, Pakuza, C, Panuganti, H, Pardons, A, Perera, A, Pucek, J, Pukhov, A, Ramjiawan, R L, Rey, S, Rieger, K, Schmitz, O, Senes, E, Silva, L O, Speroni, R, Spitsyn, R I, Stollberg, C, Sublet, A, Topaloudis, A, Torrado, N, Tuev, P V, Turner, M, Velotti, F, Verra, L, Verzilov, V A, Vieira, J, Vincke, H, Welsch, C P, Wendt, M, Wing, M, Wiwattananon, P, Wolfenden, J, Woolley, B, Xia, G, Zepp, M, Zevi Della Porta, G
Format: Artikel
Sprache:eng
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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Amplitudes
Modulation
Relativistic effects
Relativistic particles
Reproducibility
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Zusammenfassung:We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. We show experimentally that, with sufficient initial amplitude [≥(4.1±0.4)  MV/m], the phase of the modulation along the bunch is reproducible from event to event, with 3%-7% (of 2π) rms variations all along the bunch. The phase is not reproducible for lower initial amplitudes. We observe the transition between these two regimes. Phase reproducibility is essential for deterministic external injection of particles to be accelerated.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.126.164802