Numerical Simulation in Dense Plasma Diagnosis with an Amplitude-Division Soft-X-Ray Laser Interferometer

In this paper, we present a design of plasma electron-density measurement using a soft X-ray laser interferometer. Ni-like Ag 13.9nm lasing with ∼20ps pulse duration was adopted, plasma was produced by ∼85ps laser incidence on CH plane target. In order to measure electron density round critical face, and to obtain large scale, high temperature, dense plasma suited for diagnosis, we simulated the hydrodynamics of plasma under some different driven conditions using JB19 code. The affects of driven laser wavelength, laser power, and flux limit factor etc on plasma situation were analyzed. After investigated the affect of plasma rapid variety on interference fringe blur, the absorption and reflection of XRL by plasma, we gave out the laser driven condition, and plasma scale ∼1mm, electron density which can be measured (∼5x1021cm-3)