The role of incidence angle in the laser ablation of a planar target

  title={The role of incidence angle in the laser ablation of a planar target},
  author={Brett Stanford Scheiner and Mark J. Schmitt},
  journal={Physics of Plasmas},
The effect of the laser ray incidence angle on the mass ablation rate and ablation pressure of planar inertial confinement fusion (ICF) targets is explored using an idealized model. Polar direct drive (PDD) on the National Ignition Facility (NIF) requires the repointing of its 192 beams clustered within 50 degrees of the poles to minimize the imparted polar varying payload kinetic energy of the target. Due to this repointing, non-normal incidence angles of the beam centerlines are encountered… 

Development of a directly driven multi-shell platform: Laser drive energetics

Simulations predict that directly driven multi-shell targets can provide a robust alternative to conventional high-convergence implosion concepts by coupling two to three times more energy into the

Demonstration of Scale-Invariant Rayleigh-Taylor Instability Growth in Laser-Driven Cylindrical Implosion Experiments.

Rayleigh-Taylor instability growth is shown to be hydrodynamically scale invariant in convergent cylindrical implosions for targets that varied in radial dimension and implosion timescale, consistent with predictions from radiation-hydrodynamics simulations.



Direct-drive inertial confinement fusion: A review

The direct-drive, laser-based approach to inertial confinement fusion (ICF) is reviewed from its inception following the demonstration of the first laser to its implementation on the present

The direct measurement of ablation pressure driven by 351-nm laser radiation

The instantaneous scaling of ablation pressure to laser intensity is directly inferred for ramp compression of diamond targets irradiated by 351-nm light. Continuously increasing pressure profiles

Polar direct drive on the National Ignition Facility

Three recent developments in direct-drive target design have enhanced the possibility of achieving high target gain on the National Ignition Facility (NIF): (1) Laser absorption was increased by

Polar Direct Drive---Proof-of-Principle Experiments on OMEGA

Polar direct drive (PDD) [S. Skupsky et al., Phys. Plasmas 11 2763 (2004)] shows promise for achieving direct-drive ignition while the National Ignition Facility (NIF) [E. M. Campbell and W. J.

Laser-driven implosion experiments

A review of the experiments associated with laser-driven implosions is presented. These experiments include actual implosion experiments and experiments which simulate particular aspects of

Theoretical model of absorption of laser light by a plasma

A simple model of laser light absorption is described. The absorption mechanism is mainly inverse bremsstrahlung, but a crude description of resonance absorption is also included. The intensity and

Steady‐state planar ablative flow

Steady‐state planar ablative flow in a laser produced plasma is studied. The calculations relate all steady‐state fluid quantities to only three parameters, the material, absorbed irradiance, and

A study of ablation by laser irradiation of plane targets at wavelengths 1.05, 0.53, and 0.35 μm

Ablation by laser irradiation at wavelengths λ=1.05, 0.53, and 0.35 μm has been studied from analysis of time‐resolved x‐ray spectra of layered targets and of ion emission. Irradiance was varied in