Preliminary experimental study of Rayleigh-Taylor instability of surface perturbation target

An accurate evaluation of the growth rate of the Rayleigh-Taylor(RT)instability is a critical issue for inertial confinement fusion. This paper uses the face-on radiography technology to investigate the Rayleigh-Taylor instability of sine modulated surface target at the Shengguang Ⅱ facility and gains vivid space and time resolution images. The experimental results are analyzed by two methods, i.e., figuring out fundamental mode Fourier coefficient and figuring out the D-value of wave crest and wave hollow. The two methods obtain the same perturbation growth factor. Moreover, this paper presents possible reasons for the little growth with a qualitative interpretation, i.e., the density gradient stabilization and ablative stabilization suppress the perturbation growth, or the perturbation