ahmed obaid soary alkillabi

Abstract The filamentation instability (self-focusing) of laser beam propagating through magnetized plasma is occurring under the effect of nonlinear relativistic force. Taking into account the nonparaxial ray approximation, the laser beam of initial intensity (I ∼ 1019 W/cm2) is interacting with collisionless plasma to excite a positive lens that is leading to self-focus of the laser beam. The longitudinal static magnetic field is playing a significant role for increasing the self-focusing behavior of laser beam. The numerical results demonstrated that the self-focusing of the nonparaxial laser beam was lower than that of the paraxial laser beam.

We are working on the first steps to establish a permanent physics exhibition in the Physics Department, which presents the general ideas of physical theories in an interesting educational form, brings the basics of physics closer to society and specialists, and presents the basics of modern technology contributed by classical and modern physics in an understandable and eye-catching way.

The fourth consecutive participation of the Physics Department students in the Physics Olympiad, which is a scientific physics competition for physics students at the level of Iraqi universities, noting that the Physics Department / College of Science / University of Kufa had previously won first place at the level of Iraq in this competition.