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<專題討論>2016/12/1(四)14:10綜合大樓2樓48218教室演講「Local and global observations of Richtmeyer-Meskov instability in laser produced plasmas」( 藏滿康浩 副教授 / 中央大學物理系)

張貼者:2016年12月5日 下午9:43Ann-Chen Jang
We experimentally investigate the Richtmeyer-Meskov instability (RMI) in laser-produced inhomogeneous plasmas. When a shock wave interacts with an interface of inhomogeneous plasma, the RMI is excited due to the shear along the contact surface. We observed the spatial and temporal evolutions of the global plasma structures with optical imaging, showing the transition from the typical mushroom like structure to turbulence. We also observed the local plasma quantities with corrective Thomson scattering (CTS) measurement. The spatial resolved CTS data show the several transitions from blue to red shifts at different positions, indicating vortex. We estimated the time scale of the RMI growth using the observed data. The estimated time scale is about 1 ns, which is much shorter than our experimental time scale of ~ 10 ns, and thus, there is enough time for RMI to grow.
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