Significant reduction of instability growth in magnetically driven liner implosions*

Recent experiments on Sandia's Z facility have shown a significant reduction of instability growth [1] in solid metallic rods driven with a $\sim$20 MA, 100ns current pulse when thick, $\sim$70 $\mu$m dielectric coatings were employed to mitigate nonlinear growth of the electrothermal instability [2]. In this paper, we present new electrothermal mitigation experiments with MagLIF [3] relevant aluminum (aspect ratio 9) and beryllium liners (aspect ratio 6). These experiments show a similar improvement in instability performance while imploding to much higher convergence ratios and undergoing much greater acceleration.\\[4pt] [1] K.J. Peterson, T. J. Awe, et al., PRL 112, 135002 (2014).\\[0pt] [2] K.J. Peterson, D. B. Sinars, et al., Phys. Plasmas 20, 056305 (2012).\\[0pt] [3] S.A. Slutz et al., Phys. Plasmas 17, 056303 (2010).