The design of ellipsoidal plasma mirrors(EPMs)for the PEARL laser facility is presented.The EPMs achieve a magnification of 0.32 in focal spot size,and the corresponding increase in focused intensity is expected to be...The design of ellipsoidal plasma mirrors(EPMs)for the PEARL laser facility is presented.The EPMs achieve a magnification of 0.32 in focal spot size,and the corresponding increase in focused intensity is expected to be about 8.Designing and implementing such focusing optics for short-pulse(<100 fs)systems paves the way for their use in future high-power facilities,where they can be used to achieve intensities beyond 1023W/cm^(2).A retro-imaging-based target alignment system is also described,which is used to align solid targets at the output of the ellispoidal mirrors(with a numerical aperture of 0.75 in this case).展开更多
Magnetized laser-produced plasmas are central to many studies in laboratory astrophysics,in inertial confinement fusion,and in industrial applications.Here,we present the results of large-scale three-dimensional magne...Magnetized laser-produced plasmas are central to many studies in laboratory astrophysics,in inertial confinement fusion,and in industrial applications.Here,we present the results of large-scale three-dimensional magnetohydrodynamic simulations of the dynamics of a laser-produced plasma expanding into a transverse magnetic field with a strength of tens of teslas.The simulations show the plasma being confined by the strong magnetic field into a slender slab structured by the magnetized Rayleigh–Taylor instability that develops at the plasma–vacuum interface.We find that when the initial velocity of the plume is perturbed,the slab can develop kink-like motions that disrupt its propagation.展开更多
基金The results of Project LQ1606 were obtained with the financial support of the Ministry of Education,Youths and Sports as part of targeted support from the National Programme of Sustainability II.This research was also sponsored by the Czech Science Foundation(Project No.18-09560S)by the project High Field Initiative(CZ.02.1.01/0.0/0.0/15_003/0000449)from the European Regional Development Fund(HIFI),by the project on Advanced Research Using High Intensity Laser Produced Photons and Particles(No.CZ.02.1.01/0.0/0.0/16019/0000789)from the European Regional Development Fund(ADONIS)+1 种基金by theMinistry of Education and Science of the Russian Federation under Contract No.14.Z50.31.0007.The work was also supported by the Ministry of Education and Science of the Russian Federation(FTP Grant#14.607.21.0196,Project ID:RFMEFI60717X0196)The work of JIHT RAS team on X-ray measurements and analysis was done with financial support fromthe Russian Science Foundation(Grant#14-50-00124).
文摘The design of ellipsoidal plasma mirrors(EPMs)for the PEARL laser facility is presented.The EPMs achieve a magnification of 0.32 in focal spot size,and the corresponding increase in focused intensity is expected to be about 8.Designing and implementing such focusing optics for short-pulse(<100 fs)systems paves the way for their use in future high-power facilities,where they can be used to achieve intensities beyond 1023W/cm^(2).A retro-imaging-based target alignment system is also described,which is used to align solid targets at the output of the ellispoidal mirrors(with a numerical aperture of 0.75 in this case).
基金This work was supported by funding from the European Research Council(ERC)under the European Union’s Horizon 2020 research and innovation program(Grant Agreement No.787539)The research leading to these results is supported by Extreme Light Infrastructure Nuclear Physics(ELI-NP)Phase II a project co-financed by the Romanian Government and European Union through the European Regional Development Fund+1 种基金the Project No.ELI-RO-2020-23 funded by IFA(Romania)This work was also granted access to the HPC resources of MesoPSL financed by the Region Ile de France and the project Equip at Meso(Reference No.ANR-10-EQPX-29-01)of the program Investissements d’Avenir supervised by the National Agency for Research.
文摘Magnetized laser-produced plasmas are central to many studies in laboratory astrophysics,in inertial confinement fusion,and in industrial applications.Here,we present the results of large-scale three-dimensional magnetohydrodynamic simulations of the dynamics of a laser-produced plasma expanding into a transverse magnetic field with a strength of tens of teslas.The simulations show the plasma being confined by the strong magnetic field into a slender slab structured by the magnetized Rayleigh–Taylor instability that develops at the plasma–vacuum interface.We find that when the initial velocity of the plume is perturbed,the slab can develop kink-like motions that disrupt its propagation.
