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Aluminium coated microballoons have been imploded by a two-beam short-pulse Nd laser. The plasma has been examined by space-resolved x-ray spectroscopy which shows that x-ray lines from the aluminium appear in emission from the implosion core. This suggests that the targets are hydrodynamically unstable, which is contrary to expectation for this exploding pusher mode. Possible experimental errors are eliminated.
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Key et al. (1980) studied this question.
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