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### The effects of optical smoothing techniques on filamentation in laser plasmas

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1 Laser Plasma Branch, Naval Research Laboratory, Washington, D.C. 20375
Phys. Fluids 31, 3079 (1988)
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### References

• By Andrew J. Schmitt
• Source: Phys. Fluids 31, 3079 (1988);
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18.A 3‐D version of the computer code presented here has been used to simulate ISI filamentation driven by the ponderomotive force only. Preliminary runs were performed with 1.06 μm wavelength ISI light in the plasma shown in Fig. 22(a). The results indicated that although some filaments grow to much higher intensities, they do not contain much energy. The intensity probability distributions are similar to the 2‐D results shown in Sec. IV (Fig. 24).
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28.ISI filamentation simulations have been performed with no damping and give comparable results. Less damping results in acoustic waves propagating farther, and increases the characteristic distance over which the acoustic waves interact with each other. This increased interaction length is counteracted by the increased (random) phase averaging of the acoustic waves. The net result is that less damping produces a slightly more stochastic background plasma, which increases incoherent scattering of the em wave and slightly suppresses filamentation effects. In this light, the case of used in this analysis may be considered as a more stringent test for ISI smoothing than
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/content/aip/journal/pof1/31/10/10.1063/1.866964
1988-10-01
2013-12-08