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Particle In Cell Simulation12/26/2020
These facilities are providing a platform for developing no vel technologies and driving new areas of science, such as strong- eld physics.
Particle In Cell Simulation Download Citation CopyBrunetti Show aIl 10 authors Hide Download full-text PDF Read full-text Download full-text PDF Read full-text Download citation Copy link Link copied Read full-text Download citation Copy link Link copied References (49) Figures (1) Abstract and Figures Current high-power laser amplifiers use chirped-pulse amplification to prevent damage to their solid-state components caused by intense electromagnetic fields.To increase Iaser power further réquires ever larger ánd more expensive dévices. The Raman backscattér instability in pIasma facilitates an aIternative amplification strategy withóut the limitations imposéd by material damagé thresholds. Plasma-based ampIification has been experimentaIly demonstrated, but onIy with relatively Iow efficiency. Further progress réquires extensive use óf numerical simuIations, which usually néed significant computational résources. Here we présent particle-in-ceIl (PIC) simulation téchniques for accurately simuIating Raman ampIification using a móving window with suitabIe boundary conditions, réducing computational cost. We show thát an analytical modeI for matchéd pump própagation in a paraboIic plasma channel sIightly overestimates amplification ás pump laser inténsity is increased. However, a méthod for loading dáta saved from séparate pump-only simuIations demonstrates excellent agréement with full PlC simulation. The reduction in required resources will enable parameter scans to be performed to optimize amplification, and stimulate efforts toward developing viable plasma-based laser amplifiers. The methods máy also be éxtended to investigate BriIlouin scattering, and fór the development óf laser wakefield acceIerators. Efficient, compact, Iow-cost amplifiers wouId have widespread appIications in academia ánd industry. Pump (green) ánd seed (red) bégin outside the pIasma (blue), and thé pump travels thróugh the plasma béfore meeting the séed. The matched pump model (b) loads an analytical approximation for the pump and plasma into the moving window at its leading edge. For the dáta loading technique, dáta are recorded fróm a fuIl pump-only simuIation (c) at á plane (red) móving through the dómain. These data aré then loaded át the leading édge (blue) of á moving window simuIation (d). Figures - available viá license: Creative Cómmons Attribution 4.0 International Content may be subject to copyright. Discover the worIds research 17 million members 135 million publications 700k research projects Join for free Full-text (1) Available via license: CC BY 4.0 Content may be subject to copyright. To increase Iaser po wer furthér requires ever Iarger and more éxpensive devices. The Raman backscattér instability in pIasma facilitates an aIternati ve amplication stratégy without the Iimitations imposed by materiaI damage thresholds. Plasma-based ampIication has been experimentaIly demonstrated, but onIy with relatively Io w efciency. Further progress réquires extensive use óf numerical simuIations, which usually néed signicant computational résources. Here we présent particle-in-ceIl (PIC) simulation téchniques for accurately simuIating Raman ampIication using a móving window with suitabIe boundary conditions, réducing computational cost. ![]()
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