Spatially-resolved spectroscopic diagnosing of aluminum wire array Z-pinch plasmas on QiangGuang-I facility |
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| Authors: | Ye Fan Li Zheng-Hong Qin Yi Jiang Shu-Qing Xue Fei-Biao Yang Jian-Lun Xu Rong-Kun and Jin Yong-Jie |
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| Affiliation: | Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China;Key Laboratory of Particle and Radiation Imaging, Tsinghua University, Beijing 100084, China; Department of Engineering Physics, Tsinghua University, Beijing 100084, China |
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| Abstract: | 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 7.0times 1019cm-3 and 4.0times 1019 cm-3 respectively, while the ion temperature is inferred to be about 10.2 keV, which is much higher than the electron temperature. |
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| Keywords: | Z-pinch wire array x-ray spectroscopy spatially-resolved crystal spectrometer |
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