由自我调制质子束驱动的等离子体尾菲尔德等离子体尾矿的扩展时间尺度动力学的实验研究

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由自我调制质子束驱动的等离子体尾菲尔德等离子体尾矿的扩展时间尺度动力学的实验研究

Experimental study of extended timescale dynamics of a plasma wakefield driven by a self-modulated proton bunch

论文作者

Chappell, J., 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., 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., Turno, 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. Yu., Kedves, M. Á., 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., Godoy, D. Medina, Minakov, V. A., Moody, J. T., Guzmán, P. I. Morales, Moreira, M., Panuganti, H., Pardons, A., Asmus, F. Peña, 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., Velotti, F., Verra, L., Verzilov, V. A., Vieira, J., Welsch, C. P., Williamson, B., Wing, M., Wolfenden, J., Woolley, B., Dia, G., Zepp, M., Della Porta, G. Zevi

论文摘要

在高级Wakefield实验（Awake）的实验中研究了长达800 ps的时间尺度的血浆Wakefield动力学，大约100个血浆周期。由自我调制的质子束驱动的纵向韦克场振幅的发展是使用采样场的证人电子的外注射来测量的。在模拟中，韦克菲尔德的共振激发导致等离子体电子轨迹穿越，从而导致血浆边界以外的电势发展，因为电子横向弹出。实验测量了与该电位相一致的趋势，并通过种子激光定时扫描和电子注射延迟扫描来研究其对韦克菲尔德振幅的依赖。

Plasma wakefield dynamics over timescales up to 800 ps, approximately 100 plasma periods, are studied experimentally at the Advanced Wakefield Experiment (AWAKE). The development of the longitudinal wakefield amplitude driven by a self-modulated proton bunch is measured using the external injection of witness electrons that sample the fields. In simulation, resonant excitation of the wakefield causes plasma electron trajectory crossing, resulting in the development of a potential outside the plasma boundary as electrons are transversely ejected. Trends consistent with the presence of this potential are experimentally measured and their dependence on wakefield amplitude are studied via seed laser timing scans and electron injection delay scans.

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