Measurement of Radiation Temperature in Hohlraum with Shock Wave Method on 'Shenguang Ⅱ' Laser Facility

The D shaped cavity has been used to measure the radiation temperature in Hollraum on Shenguang Ⅱ laser facility. The radiation temperature was measured using two methods. One method measured the shock wave velocity produced in low-Z materials such as Al driven by the emission from hohlraum. The shock velocity was detected using optical streaked camera to observe the optical signal emitted from the rear of a step Al placed over a hole in the cavity wall. The second method measured the re-radiated X-ray flux from the cavity wave viewing through another hole in the cavity with soft X-ray spectrometer. Both methods have been shown to provide a consistent characterization of the X-ray drive in the cavity target. The experimental results were analyzed using a model that was based on heat wave similarity and energy conversation law.