Enhanced laser-driven proton-acceleration from limited mass targets by high temporal contrast ultra-intense lasers

Buffechoux, S.; Nakatsutsumi, M.; Andreev, Alexander A.; Zeil, Karl; Burris, Terry E.; Sarri, Gianluca; Amin, M.; Antici, P.; Fourmaux, S.; Gaillard, Sandrine; Mancic, A.; Tampo, M.; Pépin, H.; Audebert, P.; Willi, O.; Cowan, T. E.; Borghesi, M.; Fuchs, J.; Dumitraş, Dan

doi:10.1063/1.3426064

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“…Meanwhile, the temporal contrast at the focal region needs more attention than that in the near field, because, if the focused intensity of the noise exceeds , pre-plasma will be produced [5] and the target may get evaporated before the main pulse arrives, which could lead to poor experimental results. The influence of temporal contrast has been demonstrated and studied experimentally [6, 7] and the enhanced performances of the experiments have been obtained with high temporal contrast [8, 9] . Furthermore, when the intensity of the laser becomes higher, the requirement of temporal contrast by experiments goes up accordingly.…”

Section: Motivation For Temporal Contrast Studymentioning

confidence: 99%

Systematic study of spatiotemporal influences on temporal contrast in the focal region in large-aperture broadband ultrashort petawatt lasers

Zhu

Xie

Kang

et al. 2018

High Pow Laser Sci Eng

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Temporal contrast is one of the crucial physical determinants which guarantee the successful performance of laser–matter interaction experiments. We generally reviewed the influences on the temporal contrast in three categories of noises based on the requirement by the physical mechanisms. The spatiotemporal influences on temporal contrast at the focal region of the chromatic aberration and propagation time difference introduced by large-aperture broadband spatial filters, which were spatiotemporally coupled with compression and focusing, were calculated and discussed with a practical case in SG-II 5 PW ultrashort petawatt laser. The system-wide spatiotemporal coupling existing in large-aperture broadband ultrashort petawatt lasers was proved to be one of the possible causes of temporal contrast degradation in the focal region.

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