Femtosecond Probing of Plasma Wakefields and Observation of the Plasma Wake Reversal Using a Relativistic Electron Bunch

C. J. Zhang, J. F. Hua, Y. Wan, C. H. Pai, B. Guo, J. Zhang, Y. Ma, F. Li, Y. P. Wu, H. H. Chu, Y. Q. Gu, X. L. Xu, W. B. Mori, C. Joshi, J. Wang, W. Lu

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

We show that a high-energy electron bunch can be used to capture the instantaneous longitudinal and transverse field structures of the highly transient, microscopic, laser-excited relativistic wake with femtosecond resolution. The spatiotemporal evolution of wakefields in a plasma density up ramp is measured and the reversal of the plasma wake, where the wake wavelength at a particular point in space increases until the wake disappears completely only to reappear at a later time but propagating in the opposite direction, is observed for the first time by using this new technique.

Original languageEnglish
Article number064801
JournalPhysical Review Letters
Volume119
Issue number6
DOIs
StatePublished - 9 Aug 2017

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