Temporal characterization of a self-modulated laser wakefield accelerator

S. P. Le Blanc, M. C. Downer, R. Wagner, S. Y. Chen, A. Maksimchuk, G. Mourou, D. Umstadter

Research output: Contribution to journalConference articlepeer-review


A femtosecond pump-probe experiment based on forward, collective Thomson scattering for characterization of the amplitude, growth and decay rate of a self-modulated laser wakefield accelerator (SM-LWFA) is demonstrated. By measuring Thomson scattering from the probe pulse as a function of the delay between the pump and probe, the temporal envelope of the wakefield oscillations is recorded. The measured exponential rise time of the wakefield is in agreement with that expected from the growth of the forward Raman scattering (FRS) instability. Since the total energy in the plasma wave, the measured exponential decay rate of the wakefield is consistent with nonlinear Landau damping of trapped electrons or beam loading of the plasma wave.

Original languageEnglish
Pages (from-to)313
Number of pages1
JournalConference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
StatePublished - 1997
EventProceedings of the 1997 Conference on Lasers and Electro-Optics, CLEO - Baltimore, MD, USA
Duration: 18 May 199723 May 1997


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