We investigate the Ne-like Cr x-ray laser at 28.6 nm by using a modified 1D lagrangian hydrodynamic code MED103 coupled with an atomic physics data package and a 2D ray tracing code as a post-processor. The laser pumping configuration includes two prepulses and one main pulse. The first prepulse normally irradiates the target,while the second prepulse and the main pulse irradiate the target at grazing-incident angles. We predict that saturation can be achieved for the Ne-like Cr x-ray lasers with a total pumping energy of 125 mJ. Good beam qualities with no deflecting angle and a small divergence angle of 5 mrad are observed.
Quasistatic magnetic fields generated by nonrelativistic intense linearly polarized (LP) and circularly polarized (CP) laser pulses in an initially uniform underdense plasma in the collision-dominated limit are investigated analytically.Using a selfconsistent analytical model,we perform a detailed derivation of quasistatic magnetic fields in the laser pulse envelope in the collision-dominated limit to obtain exact analytical expressions for magnetic fields and discuss the dependence of magnetic fields on laser and plasma parameters.Equations for quasistatic magnetic fields including both axial componentB z and the azimuthal one B θ are derived simultaneously from such a selfconsistent model.The dependence of quasistatic magnetic field on incident laser intensity,transverse focused radius of laser pulse,electron density and electron temperature is discussed.
