Estimation of plasma parameters of X-pinch with time-resolved x-ray spectroscopy

作     者：Seunggi Ham Jonghyeon Ryu Hakmin Lee Sungbin Park Y.-C.Ghim Y.S.Hwang Kyoung-Jae Chung Seunggi Ham;Jonghyeon Ryu;Hakmin Lee;Sungbin Park;Y.-C.Ghim;Y.S.Hwang;Kyoung-Jae Chung

作者机构：Department of Energy Systems EngineeringSeoul National UniversitySeoul 08826South Korea Department of Nuclear and Quantum EngineeringKAISTDaejeon 34141South Korea 

出 版 物：《Matter and Radiation at Extremes》 (极端条件下的物质与辐射（英文）)

年 卷 期：2023年第8卷第3期

页      面：34-46页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 

基　　金：This research was supported by the Defense Research Laboratory Program of the Defense Acquisition Program Administration and Agency for Defense Development of the Republic of Korea 

主　　题：resolved parameters absolute 

摘      要：We estimate the parameters of a Cu plasma generated by an X-pinch by comparing experimentally measured x-rays with synthetic data.A filtered absolute extreme ultraviolet diode array is used to measure time-resolved x-ray spectra with a spectral resolution of∼1 keV in the energy range of 1–10 *** synthetic spectra of Cu plasmas with different electron temperatures,electron densities,and fast electron fractions are calculated using the FLYCHK *** quantitative comparison with the measured spectrum,two x-ray power ratios with three different spectral ranges are *** observe three x-ray bursts in X-pinch experiments with two Cu wires conducted on the SNU X-pinch at a current rise rate of∼0.2 kA/*** of the spectra reveals that the first burst comprises x-rays emitted by hot spots and electron beams,with characteristics similar to those observed in other *** second and third bursts are both generated by longlived electron beams formed after the neck structure has been completely *** the second burst,the formation of the electron beam is accompanied by an increase in the electron density of the background ***,the long-lived electron beams generate the additional strong x-ray bursts while maintaining a plasma channel in the central region of the ***,they emit many hard x-rays(HXRs),enabling the SNU X-pinch to be used as an HXR *** study confirms that the generation of long-lived electron beams is crucial to the dynamics of X-pinches and the generation of strong HXRs.