Self-focusing of a high-intensity laser in a collisional plasma under weak relativistic-ponderomotive nonlinearity

D.N. Gupta, Mohammad Islam, D.G. Jang, H. Suk, Dino Jaroszynski

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Abstract

Self-focusing a laser beam in collisional plasma is investigated under the weak relativistic-ponderomotive nonlinearity. In this case, the plasma equilibrium density is modified and it causes generation of the nonlinearity due to the Ohmic heating of electrons, collisions, and the weak relativistic-ponderomotive force during the interaction of the laser beam with the plasma. Our theoretical and simulation results show that a significant nonlinearity in laser self-focusing can occur under the weak relativistic-ponderomotive regime for some appropriate simulation parameters.
Original languageEnglish
Article number123103
Number of pages5
JournalPhysics of Plasmas
Volume20
Issue number12
DOIs
Publication statusPublished - 9 Dec 2013

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Keywords

  • laser heating
  • plasma density
  • high intensity laser pulse

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