Experimental Measurements of Hot Electrons Generated by Ultraintense (.1019 Wycm2) Laser-Plasma Interactions on Solid-Density Targets
نویسندگان
چکیده
K. B. Wharton,1,2 S. P. Hatchett,1 S. C. Wilks,1 M. H. Key,1 J. D. Moody,1 V. Yanovsky,1 A. A. Offenberger,3 B. A. Hammel,1 M. D. Perry,1 and C. Joshi2 1Lawrence Livermore National Laboratory, University of California, P.O. Box 808, Livermore, California 94550 2Department of Electrical Engineering, University of California, Los Angeles, California 90024 3Department of Electrical Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 2G7 (Received 8 December 1997)
منابع مشابه
Experimental characterization of picosecond laser interaction with solid targets.
We have characterized the plasma produced by a picosecond laser pulse using x-ray spectroscopy. High-resolution high-sensitivity spectra of K -shell emission from a Ti plasma have been obtained, showing a strong contribution from multiply ionized ions. Hydrodynamic and collisional-radiative codes are used to extract the plasma temperature and density from these measurements. We show that our me...
متن کاملInfluence of radiation reaction force on ultraintense laser-driven ion acceleration.
The role of the radiation reaction force in ultraintense laser-driven ion acceleration is investigated. For laser intensities ∼10(23)W/cm(2), the action of this force on electrons is demonstrated in relativistic particle-in-cell simulations to significantly enhance the energy transfer to ions in relativistically transparent targets, but strongly reduce the ion energy in dense plasma targets. An...
متن کاملContrasting levels of absorption of intense femtosecond laser pulses by solids
The absorption of ultraintense, femtosecond laser pulses by a solid unleashes relativistic electrons, thereby creating a regime of relativistic optics. This has enabled exciting applications of relativistic particle beams and coherent X-ray radiation, and fundamental leaps in high energy density science and laboratory astrophysics. Obviously, central to these possibilities lies the basic proble...
متن کاملMulti-ion plasma expansion in the presence of suprathermal electrons
The self similar expansion of a two-ion plasma is investigated via a multi-fluid model. Our aim is to elucidate the effect of secondary ions on the plasma expansion front, in combination with energetic (suprathermal) electrons in the background. Considering an analytically tractable situation (namely, assuming secondary ions to represent a minority population), and adopting a kappa-type distrib...
متن کاملLaser-plasma interaction in direct-drive inertial confinement fusion
Hot electrons generated by the two-plasmon–decay instability in direct-drive targets are a preheat concern. A mitigation strategy that employs a layered ablator [V. N. Goncharov et al., Phys. Plasmas 21, 056315 (2014)] has been investigated both numerically and experimentally. The numerical simulations described here predict reduced hot-electron production compared with similar targets using ei...
متن کامل