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Spatially-resolved crystal spectrometers with a high spectral resolution are developed to diagnose K-shell x-ray radiation from Z-pinch plasmas.These diagnostic apparatuses are successfully applied to aluminum wire array Z-pinch experiments on QiangGuang-I facility,a driver with a pulsed current up to about 1.5 MA in 80 ns.Time-integrated experimental results show that the K-shell x-ray emission lines of aluminum Z-pinch plasmas are dominated by line emissions from helium-like ionisation state.Bright spots that might have higher electron temperature or density are produced randomly in location and size along the z-axis during implosions.According to the experimental data,the electron temperature and the ion density are estimated to be between 250 eV and 310 eV,and between 7.0 × 10 19 cm 3 and 4.0 × 10 19 cm 3 respectively,while the ion temperature is inferred to be about 10.2 keV,which is much higher than the electron temperature.
Spatially-resolved crystal spectrometers with a high spectral resolution are developed to diagnose K-shell x-ray radiation from Z-pinch plasmas. These diagnostic tissues are successfully applied to aluminum wire array Z-pinch experiments on QiangGuang-I facility, a driver with a pulsed current up to about 1.5 MA in 80 ns.Time-integrated experimental results show that the K-shell emission lines of aluminum Z-pinch plasmas are dominated by line emissions from helium-like ionization state.Bright spots that might have higher electron temperature or density are produced randomly selected in location and size along the z-axis during implosions. According to the experimental data, the electron temperature and the ion density are estimated to be between 250 eV and 310 eV, and between 7.0 × 10 19 cm 3 and 4.0 × 10 19 cm 3 respectively, while the ion temperature is inferred to be about 10.2 keV, which is much higher than the electron temperature.