B. Ramakrishna, S. Krishnamurthy, M. Tayyab, S. Bagchi, K. Makur, Raoul Trines, Robbie Scott, Alex Robinson, J. A. Chakera. Ion source perturbation and control in intense laser plasma interaction[J]. Matter and Radiation at Extremes, 2020, 5(4): 045402
- Matter and Radiation at Extremes
- Vol. 5, Issue 4, 045402 (2020)
Fig. 1. Experimental setup. The laser (λ = 800 nm) was focused by an off-axis parabola (f/7.5) at an angle of 45° to the target. It produced up to 400 mJ in 45 fs with peak intensities ∼2 × 1018 W cm−2.
Fig. 2. Proton beam traces from the front surfaces of Perspex (top), Mylar (center), and CD2 (bottom) targets. The images show the wiggling of the beam with the target at the best focus, (a) without a pre-pulse and (b) with a pre-pulse.
Fig. 3. (a) Laser pre-pulse contrast at various Pockels cell settings. (b) A typical proton (H+) energy spectra recorded for a pre-pulse on a Perspex target showing the 1-MeV cutoff.
Fig. 4. Two-dimensional PIC simulation results. (p 2,p 1) plots of proton ions at various times: [(a) and (b)] without a pre-pulse and [(c) and (d)] with a pre-pulse.
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