Tracing ultrafast dynamics of strong fields at plasma-vacuum interfaces with longitudinal proton probing

Abicht, F.; Braenzel, J.; Priebe, Gerd; Andreev, A. A.; Nickles, P. V.; Koschitzki, Ch.; Schnürer, M.; Sandner, Wolfgang

doi:10.1063/1.4891167

Journal Article

DESY-2014-03057

Tracing ultrafast dynamics of strong fields at plasma-vacuum interfaces with longitudinal proton probing

Abicht, F. ; Braenzel, J. ; Priebe, G.Extern*XFEL* ; Koschitzki, C. ; Andreev, A. A. ; Nickles, P. V. ; Sandner, W.DESY* ; Schnürer, M. (Corresponding author)

2014
American Institute of Physics Melville, NY

Applied physics letters 105(3), 034101 (2014) [10.1063/1.4891167]

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Please use a persistent id in citations: doi:10.1063/1.4891167

Abstract: If regions of localized strong fields at plasma-vacuum interfaces are probed longitudinally with laser accelerated proton beams their velocity distribution changes sensitively and very fast. Its measured variations provide indirectly a higher temporal resolution as deduced from deflection geometries which rely on the explicit temporal resolution of the proton beam at the position of the object to probe. With help of reasonable models and comparative measurements changes of proton velocity can trace the field dynamics even at femtosecond time scale. In longitudinal probing, the very low longitudinal emittance together with a broad band kinetic energy distribution of laser accelerated protons is the essential prerequisite of the method. With a combination of energy and one-dimensional spatial resolution, we resolve fast field changes down to 100 fs. The used pump probe setup extends previous schemes and allows discriminating simultaneously between electric and magnetic fields in their temporal evolution.

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