|
内容記述 |
Gamma Flash is one of the most promising laser–plasma interaction regimes with laser to γ conversion efficiency of up to 40% [1,2]. With the J-KAREN-P laser [3-5] we demonstrated the Gamma Flash dominant regime [6], where it scaled quickly with the laser power and exceeded Bremsstrahlung. 3D Hydro [7]+PIC [8] simulations revealed attosecond Terawatt Gamma Flash with nano-size source and record brightness of >1023 photons/mm2mrad2s 0.1%BW at tens of MeV photon energies [6], surpassing astrophysical GRBs.[1]T.Nakamura et al "High-Power γ-Ray Flash Generation in Ultraintense Laser-Plasma Interactions" RRL 108 195001 (2012)[2]C.P.Ridgers et al "Dense Electron-Positron Plasmas and Ultraintense γ rays from Laser-Irradiated Solids" PRL 108 165006 (2012)[3]H.Kiriyama et al "Experimental investigation on temporal contrast of pre-pulses by post-pulses in a petawatt laser facility" OL 45 1100 (2020)[4]A.S.Pirozhkov et al "Approaching the diffraction-limited, bandwidth-limited Petawatt" Opt.Express 25, 20486 (2017)[5]E.Vishnyakov et al "Metrology for sub-Rayleigh-length target positioning in~1022W/cm2 laser-plasma experiments" HPLSE 12, e32 (2024)[6]A.S.Pirozhkov et al "Demonstration of the Brightest Nano-size Gamma Source," arXiv:2410.06537 (2024)[7]A.Y.Krukovskiy, V.G.Novikov, I.P.Tsygvintsev, "3D simulation of the impact made by a noncentral laser pulse on a spherical tin target," Math. Models and Computer Simulations 9, 48 (2017)[8]T.Arber et al "Contemporary particle-in-cell approach to laser-plasma modelling," PPCF 57, 113001 (2015) |
