Bulletin of the American Physical Society
63rd Annual Meeting of the APS Division of Plasma Physics
Volume 66, Number 13
Monday–Friday, November 8–12, 2021; Pittsburgh, PA
Session NO07: ICF: Laser Plasma Interactions I
9:30 AM–12:30 PM,
Wednesday, November 10, 2021
Room: Rooms 315-316
Chair: Russell Follett, Laboratory for Laser Energetics - Rochester
Abstract: NO07.00008 : Amplification of beams with orbital angular momentum to ultra-high intensity by Brillouin scattering *
10:54 AM–11:06 AM
Presenter:
Qingsong Feng
(University of Oxford)
Authors:
Qingsong Feng
(University of Oxford)
Ramy Aboushelbaya
(University of Oxford)
Marko W Mayr
(University of Oxford)
Ben T Spiers
(University of Oxford)
Robert W Paddock
(University of Oxford)
Iustin Ouatu
(University of Oxford)
Robin Timmis
(University of Oxford)
Robin Wang
(University of Oxford)
Peter A Norreys
(Rutherford Appleton Lab)
Collaboration:
The authors gratefully acknowledge the support of ARCHER2 UK National Supercomputing Service, all of the staff of the Central Laser Facility and the Scientific Computing Department's SCARF supercomputing facility at the UKRI-
Here, one-dimensional (1D) particle-in-cell simulations and Vlasov simulations are given to find the optimal parameter region for the Brillouin amplification, in which the seed pulse can be amplified to ultra-high intensity. Next a self-similar model of Brillouin amplification taking into account waving-breaking, filamentation and parasitic Brillouin/Raman scatterings will be presented in order to obtain the optimal seed duration and plasma length. Then full-scale three-dimensional (3D) particle-in-cell simulations are given to amplify the intense OAM beams to ultra-high intensity by stimulated Brillouin scattering in short-scale plasmas. Finally, we provide evidence that new OAM modes are also generated in the Brillouin amplification process.
*This research was supported by the Oxford-ShanghaiTech collaboration project, the National Natural Science Foundation of China (Grant Nos. 12005021).
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