PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Spatially-resolved spectroscopic diagnosing of aluminum wire array Z-pinch plasmas on QiangGuang-I facility |
Ye Fan (叶凡)abc, Li Zheng-Hong (李正宏)a, Qin Yi (秦义)a, Jiang Shu-Qing (蒋树庆)a, Xue Fei-Biao (薛飞彪)a, Yang Jian-Lun (杨建伦)a, Xu Rong-Kun (徐荣昆)a, Jin Yong-Jie (金永杰)bc |
a Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China; b Key Laboratory of Particle and Radiation Imaging, Tsinghua University, Beijing 100084, China; c 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 7.0×1019cm-3 and 4.0×1019 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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Revised: 08 January 2010
Accepted manuscript online:
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PACS:
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52.25.Tx
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(Emission, absorption, and scattering of particles)
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52.58.Lq
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(Z-pinches, plasma focus, and other pinch devices)
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52.70.La
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(X-ray and γ-ray measurements)
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52.25.Jm
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(Ionization of plasmas)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10635050). |
Cite this article:
Ye Fan (叶凡), Li Zheng-Hong (李正宏), Qin Yi (秦义), Jiang Shu-Qing (蒋树庆), Xue Fei-Biao (薛飞彪), Yang Jian-Lun (杨建伦), Xu Rong-Kun (徐荣昆), Jin Yong-Jie (金永杰) Spatially-resolved spectroscopic diagnosing of aluminum wire array Z-pinch plasmas on QiangGuang-I facility 2010 Chin. Phys. B 19 075204
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