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

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

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.

Keywords: Z-pinch wire array x-ray spectroscopy spatially-resolved crystal spectrometer

Revised: 08 January 2010
Accepted manuscript online:

PACS:	52.25.Tx	(Emission, absorption, and scattering of particles)
	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)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10635050).

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

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