Spatially-resolved spectroscopic diagnosing of aluminum wire array Z-pinch plasmas on QiangGuang-I facility

doi:10.1088/1674-1056/19/7/075204

中国物理B ›› 2010, Vol. 19 ›› Issue (7): 75204-075204.doi: 10.1088/1674-1056/19/7/075204

Spatially-resolved spectroscopic diagnosing of aluminum wire array Z-pinch plasmas on QiangGuang-I facility

李正宏¹, 秦义¹, 蒋树庆¹, 薛飞彪¹, 杨建伦¹, 徐荣昆¹, 叶凡², 金永杰³

(1)Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China; (2)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, B; (3)Key Laboratory of Particle and Radiation Imaging, Tsinghua University, Beijing 100084, China;Department of Engineering Physics, Tsinghua University, Beijing 100084, China

修回日期:2010-01-08 出版日期:2010-07-15 发布日期:2010-07-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10635050).

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; ^bKey Laboratory of Particle and Radiation Imaging, Tsinghua University, Beijing 100084, China; ^c Department of Engineering Physics, Tsinghua University, Beijing 100084, China

Revised:2010-01-08 Online:2010-07-15 Published:2010-07-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10635050).

摘要/Abstract

摘要： 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.

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.

Key words: Z-pinch, wire array, x-ray spectroscopy, spatially-resolved crystal spectrometer

中图分类号: (Emission, absorption, and scattering of particles)

52.25.Tx

52.58.Lq (Z-pinches, plasma focus, and other pinch devices) 52.70.La (X-ray and γ-ray measurements) 52.25.Jm (Ionization of plasmas)

叶凡, 李正宏, 秦义, 蒋树庆, 薛飞彪, 杨建伦, 徐荣昆, 金永杰. Spatially-resolved spectroscopic diagnosing of aluminum wire array Z-pinch plasmas on QiangGuang-I facility[J]. 中国物理B, 2010, 19(7): 75204-075204.

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[J]. Chin. Phys. B, 2010, 19(7): 75204-075204.

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Spatially-resolved spectroscopic diagnosing of aluminum wire array Z-pinch plasmas on QiangGuang-I facility

Spatially-resolved spectroscopic diagnosing of aluminum wire array Z-pinch plasmas on QiangGuang-I facility

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