Numerical simulation of effect of laser nonuniformity on interior interface

yu xiao-jin; wu jun-feng; ye wen-hua

Volume 19 Issue 08

Aug. 2007

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yu xiao-jin, wu jun-feng, ye wen-hua. Numerical simulation of effect of laser nonuniformity on interior interface[J]. High Power Laser and Particle Beams, 2007, 19.

Citation:

yu xiao-jin, wu jun-feng, ye wen-hua. Numerical simulation of effect of laser nonuniformity on interior interface[J]. High Power Laser and Particle Beams, 2007, 19.

yu xiao-jin, wu jun-feng, ye wen-hua. Numerical simulation of effect of laser nonuniformity on interior interface[J]. High Power Laser and Particle Beams, 2007, 19.

Citation:

yu xiao-jin, wu jun-feng, ye wen-hua. Numerical simulation of effect of laser nonuniformity on interior interface[J]. High Power Laser and Particle Beams, 2007, 19.

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Numerical simulation of effect of laser nonuniformity on interior interface

1.
Institute of Applied Physics and Computational Mathematics,P.O.Box 8009,Beijing 100088,China

Publish Date: 2007-08-15

Abstract

Abstract

Using the LARED-S code and referring to the NIF direct-drive DT ignition target, the effect of laser nonuniformity on the interior interface in direct-drive spherical implosion with high convergence ratio was numerically studied. The two-dimensional results show that the implosion with high convergence ratio is sensitive to the nonuniformity of driving laser, and the growth of hydrodynamic instability on interior interface destroys the symmetric-drive and reduces the volume of central hot spot observably. Taking the limit that perturbation amplitude is equal to 1/3 radius of central hot spot, the simulation also gives that the requirements for the laser uniformity for different mode number(less than 12) on simple physical model are between 2.5%~0.25%, and the modes between 8~10 have the mo
- icf,
- hydrodynamic instability,
- convergence ratio,
- nonuniformity,
- numerical simulation

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