Abstract
Measurements are reported of the plasma electron density and temperature profiles in cylindrical cavities, transversely irradiated through an off-center longitudinal slit. The temporal evolution of these quantities is determined from spatially and temporally resolved aluminum K-shell spectra using a novel experimental setup. For 300 μm diameter cylindrical cavities, the parameters of the ablating as well as of the colliding plasma have been measured and cooling rates have been determined from the time-dependent electron temperature profiles. The cooling rates in the cylindrical cavities are found to decrease with increasing diameter and to be lowest for slab targets. This is attributed to enhanced thermal conduction to the sorrounding walls.
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