Temporal feedback control of high-intensity laser pulses to optimize ultrafast heating of atomic clusters
| Autor: | Samuel Eardley, S. J. Hawkes, Stuart Mangles, J.-N. Gruse, V. A. Marshall, S. V. Rahul, Jens Osterhoff, Oleg Chekhlov, Nicolas Bourgeois, C. J. Hooker, Sheroy Tata, J. D. E. Scott, C. D. Murphy, C. Thornton, P. P. Rajeev, Emma Springate, Dan Symes, B. Parry, J. Hah, S. J. D. Dann, Roland Smith, Alexander Thomas, M. Krishnamurthy, P. Pourmoussavi, S. Rozario, D. Hazra, C. D. Baird, Christopher D. Gregory, Zulfikar Najmudin, Y. Tang, M. J. V. Streeter |
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| Přispěvatelé: | The Royal Society, Science and Technology Facilities Council (STFC) |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) FOS: Physical sciences chemistry.chemical_element Signal edge Radiation 01 natural sciences 09 Engineering 010305 fluids & plasmas law.invention Physics Applied Optics X-RAY-EMISSION law 0103 physical sciences ddc:530 010306 general physics Applied Physics Jet (fluid) Argon Science & Technology 02 Physical Sciences business.industry Physics Laser Physics - Plasma Physics Pulse (physics) Plasma Physics (physics.plasm-ph) Full width at half maximum chemistry Physical Sciences business Ultrashort pulse GENERATION |
| Zdroj: | 244101-5 244101-1 Applied physics letters 112(24), 244101 (2018). doi:10.1063/1.5027297 |
| ISSN: | 0003-6951 |
| DOI: | 10.1063/1.5027297 |
| Popis: | 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. 5 pages, 3 figures, Published in APL |
| Databáze: | OpenAIRE |
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