Experimental study of wakefields driven by a self-modulating proton bunch in plasma

arXiv: Accelerator Physics Pub Date : 2020-05-11 DOI:10.1103/PHYSREVACCELBEAMS.23.081302

M. Turner, P. Muggli, E. Adli, R. Agnello, M. Aladi, Y. Andrèbe, O. Apsimon, R. Apsimon, A. Bachmann, M. Baistrukov, F. Batsch, M. Bergamaschi, P. Blanchard, P. Burrows, B. Buttenschön, A. Caldwell, J. Chappell, E. Chevallay, M. Chung, D. Cooke, H. Damerau, C. Davut, G. Demeter, L. Deubner, A. Dexter, G. Djotyan, S. Doebert, J. Farmer, A. Fasoli, V. Fedosseev, R. Fiorito, R. Fonseca, F. Friebel, I. Furno, L. Garolfi, S. Gessner, B. Goddard, I. Gorgisyan, A. Gorn, Eduardo Granados, M. Granetzny, O. Grulke, E. Gschwendtner, V. Hafych, A. Hartin, A. Helm, J. Henderson, A. Howling, M. Hüther, R. Jacquier, S. Jolly, I. Kargapolov, M. Kedves, F. Keeble, M. D. Kelisani, S. Kim, F. Kraus, M. Krupa, T. Lefevre, Y. Li, L. Liang, S. Liu, N. Lopes, K. Lotov, M. Martyanov, S. Mazzoni, D. Medina Godoy, V. A. Minakov, J. Moody, P. Morales Guzmán, M. Moreira, H. Panuganti, A. Pardons, F. Peña Asmus, A. Perera, A. Petrenko, J. Půček, A. Pukhov, B. Ráczkevi, R. Ramjiawan, S. Rey, H. Ruhl, H. Saberi, O. Schmitz, E. Senes, P

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引用次数: 9

Abstract

We study experimentally the longitudinal and transverse wakefields driven by a highly relativistic proton bunch during self-modulation in plasma. We show that the wakefields' growth and amplitude increase with increasing seed amplitude as well as with the proton bunch charge in the plasma. We study transverse wakefields using the maximum radius of the proton bunch distribution measured on a screen downstream from the plasma. We study longitudinal wakefields by externally injecting electrons and measuring their final energy. Measurements agree with trends predicted by theory and numerical simulations and validate our understanding of the development of self-modulation. Experiments were performed in the context of the Advanced Wakefield Experiment (AWAKE).

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等离子体中自调制质子束驱动尾流场的实验研究

实验研究了等离子体自调制过程中高度相对论质子束驱动的纵向和横向尾流场。结果表明，尾流场的生长和振幅随粒子振幅的增大而增大，并随等离子体中质子束电荷的增大而增大。我们使用在等离子体下游的屏幕上测量的质子束分布的最大半径来研究横向尾流场。我们通过外部注入电子并测量其最终能量来研究纵向尾流场。测量结果与理论和数值模拟预测的趋势一致，验证了我们对自调制发展的理解。实验在高级韦克菲尔德实验(AWAKE)的背景下进行。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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arXiv: Accelerator Physics

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