Abstract
The radiation field in a hohlraum (4 mm diameter×4 mm length) with a ∼10 TW x-ray input has been simultaneously measured by two independent techniques. An active shock breakout measurement of radiation-driven shock velocity in aluminum indicates a peak radiation field with incident flux equivalent to a Planckian distribution with a temperature of 147±3 eV. In the same experiment, a time- and spatially resolved measurement of x-ray re-emission from the gold hohlraum wall indicates re-emission flux equivalent to a Planckian brightness temperature of 145±5 eV.
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