On the Shenguang-Ⅲ prototype high power laser facility,the shock wave velocity in quartz is measured by an imaging velocity interferometers system for any reflector(VISAR) made by oneself and viewdata signals with high quality are acquired.Experimental results indicate that the radiation temperature is about 180 eV in a high z cylindrical hohlraum which is irradiated by eight laser pulses with 400 J energy.Also it indicates that the velocity of the shock wave in quartz is 36.47 km/s after the sh...