Verra L, Zevi Della Porta G, Pucek J, Nechaeva T, Wyler S, Bergamaschi M, Senes E, Guran E, Moody J T, Kedves M Á, Gschwendtner E, Muggli P, Agnello R, Ahdida C C, Goncalves M C A, Andrebe Y, Apsimon O, Apsimon R, Arnesano J M, Bachmann A-M, Barrientos D, Batsch F, Bencini V, Blanchard P, Burrows P N, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke D A, Davut C, Demeter G, Dexter A C, Doebert S, Elverson F A, Farmer J, Fasoli A, Fedosseev V, Fonseca R, Furno I, Gorn A, Granados E, Granetzny M, Graubner T, Grulke O, Hafych V, Henderson J, Hüther M, Khudiakov V, Kim S-Y, Kraus F, Krupa M, Lefevre T, Liang L, Liu S, Lopes N, Lotov K, Martinez Calderon M, Mazzoni S, Medina Godoy D, Moon K, Morales Guzmán P I, Moreira M, Nowak E, Pakuza C, Panuganti H, Pardons A, Pepitone K, Perera A, Pukhov A, Ramjiawan R L, Rey S, Schmitz O, Silva F, Silva L, Stollberg C, Sublet A, Swain C, Topaloudis A, Torrado N, Tuev P, Velotti F, Verzilov V, Vieira J, Weidl M, Welsch C, Wendt M, Wing M, Wolfenden J, Woolley B, Xia G, Yarygova V, Zepp M
Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland.
CERN, 1211 Geneva 23, Switzerland.
Phys Rev Lett. 2022 Jul 8;129(2):024802. doi: 10.1103/PhysRevLett.129.024802.
A long, narrow, relativistic charged particle bunch propagating in plasma is subject to the self-modulation (SM) instability. We show that SM of a proton bunch can be seeded by the wakefields driven by a preceding electron bunch. SM timing reproducibility and control are at the level of a small fraction of the modulation period. With this seeding method, we independently control the amplitude of the seed wakefields with the charge of the electron bunch and the growth rate of SM with the charge of the proton bunch. Seeding leads to larger growth of the wakefields than in the instability case.
在等离子体中传播的长而窄的相对论性带电粒子束会受到自调制（SM）不稳定性的影响。我们表明，质子束的自调制可以由先前电子束驱动的尾场引发。自调制的时间再现性和控制处于调制周期的一小部分水平。通过这种引发方法，我们可以通过电子束的电荷量独立控制种子尾场的幅度，并通过质子束的电荷量控制自调制的增长率。与不稳定性情况相比，引发导致尾场有更大的增长。
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