Temporal Feedback Control of High-Intensity Laser Pulses to Optimize Ultrafast Heating of Atomic Clusters

Abstract

We describe how active feedback routines can be applied at limited repetition rate (5 Hz) to optimize high-power $>10$ TW) laser interactions with clustered gases. Optimization of x-ray production from an argon cluster jet, using a genetic algorithm, approximately doubled the measured energy through temporal modification of the 150 mJ driving laser pulse. This approach achieved an increased radiation yield through exploration of a multi-dimensional parameter space, without requiring detailed a priori knowledge of the complex cluster dynamics. The optimized laser pulses exhibited a slow rising edge to the intensity profile, which enhanced the laser energy coupling into the cluster medium, compared to the optimally compressed FWHM pulse (40 fs). Our work suggests that this technique can be more widely utilized for control of intense pulsed secondary radiation from petawatt-class laser systems.

arXiv comment5 pages, 3 figures, Published in APL

References in corpus (7)

• Femtosecond x rays from laser-plasma accelerators
• Shaped-pulse optimisation of coherent soft-x-rays
• Laser-driven nonlinear cluster dynamics
• Coherent control of plasma dynamics
• Nonlinear resonance absorption in laser-cluster interaction
• Intense high contrast femtosecond K-shell x-ray source from laser-driven Ar clusters
• Anharmonic resonance absorption of short laser pulses in clusters: A molecular dynamics simulation study

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• Development of ion recoil energy distributions in the Coulomb explosion of argon clusters resolved by charge-state selective ion energy spectroscopy