Capturing relativistic wakefield structures in plasmas using ultrashort high-energy electrons as a probe

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題名:	Capturing relativistic wakefield structures in plasmas using ultrashort high-energy electrons as a probe
作者:	白植豪;Zhang, C. J.;Hua, J. F.;Xu, X. L.;Li, F.;Pai, C.-H.;Wan, Y.;Wu, Y. P.;Gu, Y. Q.;Mori, W. B.;Joshi, C.;Lu, W.
貢獻者:	理學院物理學系
關鍵詞:	639/766/1960/1137;639/766/930/2735;70 PLASMA PHYSICS AND FUSION TECHNOLOGY;Charged particles;Electric fields;Electrons;Energy;Humanities and Social Sciences;Lasers;multidisciplinary;Physics;Plasma;Science;Simulation
日期:	2016-07-11
上傳時間:	2026-04-23 11:44:22 (UTC+8)
出版者:	Nature Publishing Group;London: Springer Science and Business Media LLC
摘要:	摘要： AbstractA new method capable of capturing coherent electric field structures propagating at nearly the speed of light in plasma with a time resolution as small as a few femtoseconds is proposed. This method uses a few femtoseconds long relativistic electron bunch to probe the wake produced in a plasma by an intense laser pulse or an ultra-short relativistic charged particle beam. As the probe bunch traverses the wake, its momentum is modulated by the electric field of the wake, leading to a density variation of the probe after free-space propagation. This variation of probe density produces a snapshot of the wake that can directly give many useful information of the wake structure and its evolution. Furthermore, this snapshot allows detailed mapping of the longitudinal and transverse components of the wakefield. We develop a theoretical model for field reconstruction and verify it using 3-dimensional particle-in-cell (PIC) simulations. This model can accurately reconstruct the wakefield structure in the linear regime and it can also qualitatively map the major features of nonlinear wakes. The capturing of the injection in a nonlinear wake is demonstrated through 3D PIC simulations as an example of the application of this new method. 其他題名： Sci Rep 出版者： London: Springer Science and Business Media LLC 出版日期： 2016-07-11 出處： Scientific Reports, 2016-07, Vol.6 (1), p.29485, Article 29485 資源來源： Nature Journals Online 版權： The Author(s) 2016 版權： Copyright Nature Publishing Group Jul 2016 版權： Copyright © 2016, Macmillan Publishers Limited 2016 Macmillan Publishers Limited 識別號： ISSN: 2045-2322 識別號： EISSN: 2045-2322 識別號： DOI: 10.1038/srep29485 識別號： PMID: 27403561
顯示於類別:	[物理學系] 期刊論文

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