Laser wakefield acceleration with active feedback at 5 Hz
| Autor: | S. V. Rahul, Jens Osterhoff, P. P. Rajeev, J.-N. Gruse, C. D. Murphy, Samuel Eardley, S. J. Hawkes, Stuart Mangles, D. Hazra, Nicolas Bourgeois, M. J. V. Streeter, Roland Smith, A. G. R. Thomas, P. Pourmoussavi, V. A. Marshall, J. D. E. Scott, O. Chekhlov, D. R. Symes, B. Parry, John Nees, Karl Krushelnick, Christopher D. Gregory, S. J. D. Dann, Emma Springate, J. Hah, S. Rozario, C. D. Baird, C. Thornton, Zulfikar Najmudin, Y. Tang, C. J. Hooker, Sheroy Tata |
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| Přispěvatelé: | Science and Technology Facilities Council (STFC) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Nuclear and High Energy Physics
Work (thermodynamics) Physics and Astronomy (miscellaneous) Electron 01 natural sciences law.invention Physics Particles & Fields Acceleration Optics law 0103 physical sciences ddc:530 ALGORITHM 010306 general physics OPTIMIZATION Physics Science & Technology PLASMA 010308 nuclear & particles physics business.industry Surfaces and Interfaces Plasma DRIVEN BEAMS Plasma acceleration Laser Pulse (physics) ELECTRONS PULSES Physics Nuclear INTENSE Physical Sciences Cathode ray Physics::Accelerator Physics business GENERATION |
| Zdroj: | Physical review accelerators and beams 22(4), 041303 (2019). doi:10.1103/PhysRevAccelBeams.22.041303 |
| ISSN: | 2469-9888 |
| DOI: | 10.1103/PhysRevAccelBeams.22.041303 |
| Popis: | Physical review accelerators and beams 22(4), 041303 (2019). doi:10.1103/PhysRevAccelBeams.22.041303 We describe the use of a genetic algorithm to apply active feedback to a laser wakefield accelerator at a higher power (10 TW) and a lower repetition rate (5 Hz) than previous work. The temporal shape of the drive laser pulse was adjusted automatically to optimize the properties of the electron beam. By changing the software configuration, different properties could be improved. This included the total accelerated charge per bunch, which was doubled, and the average electron energy, which was increased from 22 to 27 MeV. Using experimental measurements directly to provide feedback allows the system to work even when the underlying acceleration mechanisms are not fully understood, and, in fact, studying the optimized pulse shape might reveal new insights into the physical processes responsible. Our work suggests that this technique, which has already been applied with low-power lasers, can be extended to work with petawatt-class laser systems. Published by American Physical Society, College Park, MD |
| Databáze: | OpenAIRE |
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