Experimental research on Z-pinch at Qiangguang-I facility

Experimental research on plasma radiation characteristics and plasma implosion of Kr gas-puff, W wire array, Ne gas-puff and Al wire array Z pinches performed on Qiangguang-I pulsed power generator of 1.4-2.1 MA current with 80-100 ns rise time is reported. In the experiments, the voltage divider and two Rogowskii coils were used to measure the voltage and the current of diode respectively, a filter-XRD and a scintillator-photodiode detector with even energy respond in the energy region from 100 eV to 1400 eV were used to measure X-ray waveforms, the Ni-film bolometer was developed for measuring the total soft X-ray energy, the time-resolved X-ray image diagnostic system was developed for recording the imploding process of Z pinches, and an elliptically-curved crystal spectrometer with temporal and spatial resolution was developed for diagnosing K-shell radiation of Z-pinch plasma. A total soft X-ray energy of 620kJ and 32 kJ, a peak X-ray power of 1.7 TW and 1.3 TW, and a total energy transfer coefficient of 23% and 12.5% wave achieved respectively for Kr gas-puff liner and for W wire-array liner. A K-shell radiation energy of 5.6 kJ and 2.3 kJ, a peak radiation power of 256 GW and 94 GW, and an energy transfer coefficient of 2% and 0.8% were achieved respectively for Ne gas-puff liner and for Al wire-array liner. The 'zipper-phenomenon' was found in the imploding process of gas puff Z pinches, and the precursor phenomenon was found in the imploding process of wire array Z pinches.