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Interferometric measurements have been made of the electron-density structures produced in plasmas generated by the interaction of 1.06-{μ}m radiation with targets at irradiances I of 10¹⁶ W cm^-2. Strong profile steepening near critical density with an I0.16 scaling is observed together with supercritical density bumps and structures attributable to magnetic field effects.
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Raven et al. (1979) studied this question.
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