نتایج جستجو برای: plasma inertial confinement
تعداد نتایج: 388472 فیلتر نتایج به سال:
LLE Review, Volume 148 181 Using laser-plasma optical systems to manipulate the basic properties of light waves has caused a recent surge of interest.1–4 Plasma-based photonic devices are attractive because they can be ultrafast, damage resistant, and easily tunable. Alleviating concerns about optic damage by replacing conventional optics with plasma-based components could lead to the next gene...
A procedure for performing Monte Carlo calculations of plasmas with an arbitrary level of degeneracy is outlined. It has possible applications in inertial confinement fusion and astrophysics. Degenerate particles are initialised according to the Fermi–Dirac distribution function, and scattering is via a Pauli blocked binary collision approximation. The algorithm is tested against degenerate ele...
Cross-beam energy transfer (CBET) results from two-beam energy exchange via seeded stimulated Brillouin scattering, which detrimentally reduces ablation pressure and implosion velocity in direct-drive inertial confinement fusion. Mitigating CBET is demonstrated for the first time in inertial-confinement implosions at the National Ignition Facility by detuning the laser-source wavelengths (±2.3 ...
156 LLE Review, Volume 92 Introduction In inertial confinement fusion1 experiments, shells filled with deuterium (D2) or a deuterium–tritium (DT) mixture are heated by either direct laser illumination or soft x-ray radiation in a laser-heated hohlraum. The target is compressed to conditions under which thermonuclear fusion occurs. The most-promising target designs consist of a layered cryogenic...
LLE Review, Volume 118 68 Laser-generated relativistic electron beams have applications in compact, high-brightness laser–plasma particle accelerators,1 narrowband x-ray sources for medical applications,2 x-ray sources for ignition-scale, high-density inertial confinement fusion (ICF) target backlighter radiography,3 collimated electron beams for free-electron lasers,4 and collimated electron b...
We present a theoretical model that allows a fast and accurate evaluation of ionic transport properties of realistic plasmas spanning from warm and dense to hot and dilute conditions, including mixtures. This is achieved by combining a recent kinetic theory based on effective interaction potentials with a model for the equilibrium radial density distribution based on an average atom model and t...
Raman amplification in plasma has been promoted as a means of compressing picosecond optical laser pulses to femtosecond duration to explore the intensity frontier. Here we show for the first time that it can be used, with equal success, to compress laser pulses from nanosecond to picosecond duration. Simulations show up to 60% energy transfer from pump pulse to probe pulse, implying that multi...
Enhancement of the ion temperature and fusion yield has been observed in magnetized laser-driven inertial confinement fusion implosions on the OMEGA Laser Facility. A spherical CH target with a 10 atm D2 gas fill was imploded in a polar-drive configuration. A magnetic field of 80 kG was embedded in the target and was subsequently trapped and compressed by the imploding conductive plasma. As a r...
Time-gated, monoenergetic radiography with 15-MeV protons provides unique measurements of implosion dynamics in direct-drive inertial-confinement fusion. Images obtained during acceleration, coasting, deceleration, and stagnation display a comprehensive picture of spherical implosions. Critical information inferred from such images, hitherto unavailable, characterizes the spatial structure and ...
Approaches in Europe to heavy ion induced Inertial Confinement Fusion are oriented toward the linac-plusstorage ring technique. Despite the very limited support of this work, technical progress was achieved in some important areas. For the immediate future, a substantial intensity upgrade of the GSI accelerator facilities at Darmstadt is being implemented, leading to specific energy depositions...
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