We report on the development and implementation of a time resolved backscatter diagnostics for high power laser plasma experiments at the petawatt-class laser facility PHELIX. Pulses that are backscattered or reflected from overcritical plasmas are characterized spectrally and temporally resolved using a specially designed second harmonic generation frequency resolved optical gating system. The diagnostics meets the requirements made by typical experiments, i.e., a spectral bandwidth of more than with sub-nanometer resolution and a temporal window of with temporal resolution. The diagnostics is permanently installed at the PHELIX target area and can be used to study effects such as laser-hole boring or relativistic self-phase-modulation which are important features of laser-driven particle acceleration experiments.
Backreflection diagnostics for ultra-intense laser plasma experiments based on frequency resolved optical gating
F. Wagner, J. Hornung, C. Schmidt, M. Eckhardt, M. Roth, T. Stöhlker, V. Bagnoud; Backreflection diagnostics for ultra-intense laser plasma experiments based on frequency resolved optical gating. Rev. Sci. Instrum. 1 February 2017; 88 (2): 023503. https://doi.org/10.1063/1.4975827
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