Effect of intense radiation on the X-ray emission spectrum of non-LTE plasmas

Huang Chengwu; Zhu Tuo; Zhang Yuxue; Song Tianming; Zhao Yang; Zhang Jiyan; Zhang Zhiyu; Xiong Gang; Qing Bo; Zhao Yan; Li Liling; Wei Minxi; Wu Zeqing; Yan Jun; Yang Jiamin

doi:10.1063/5.0304724

Volume 11 Issue 2

Mar. 2026

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Article Navigation > Matter and Radiation at Extremes > 2026 > 11(2): 025602

Huang Chengwu, Zhu Tuo, Zhang Yuxue, Song Tianming, Zhao Yang, Zhang Jiyan, Zhang Zhiyu, Xiong Gang, Qing Bo, Zhao Yan, Li Liling, Wei Minxi, Wu Zeqing, Yan Jun, Yang Jiamin. Effect of intense radiation on the X-ray emission spectrum of non-LTE plasmas[J]. Matter and Radiation at Extremes, 2026, 11(2): 025602. doi: 10.1063/5.0304724

Citation:

Huang Chengwu, Zhu Tuo, Zhang Yuxue, Song Tianming, Zhao Yang, Zhang Jiyan, Zhang Zhiyu, Xiong Gang, Qing Bo, Zhao Yan, Li Liling, Wei Minxi, Wu Zeqing, Yan Jun, Yang Jiamin. Effect of intense radiation on the X-ray emission spectrum of non-LTE plasmas[J]. Matter and Radiation at Extremes, 2026, 11(2): 025602. doi: 10.1063/5.0304724

Citation:

Huang Chengwu, Zhu Tuo, Zhang Yuxue, Song Tianming, Zhao Yang, Zhang Jiyan, Zhang Zhiyu, Xiong Gang, Qing Bo, Zhao Yan, Li Liling, Wei Minxi, Wu Zeqing, Yan Jun, Yang Jiamin. Effect of intense radiation on the X-ray emission spectrum of non-LTE plasmas[J]. Matter and Radiation at Extremes, 2026, 11(2): 025602. doi: 10.1063/5.0304724

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Effect of intense radiation on the X-ray emission spectrum of non-LTE plasmas

doi: 10.1063/5.0304724

Huang Chengwu^{1, 2
,},
Zhu Tuo^{1, 2, 3
,},
Zhang Yuxue^{1, 2
,},
Song Tianming^{1, 2
,
,
,},
Zhao Yang^{1, 2
,},
Zhang Jiyan^{1, 2
,},
Zhang Zhiyu^{1, 2
,},
Xiong Gang^{1, 2
,},
Qing Bo^{1, 2},
Zhao Yan^{1, 2},
Li Liling^{1, 2
,},
Wei Minxi^{1, 2},
Wu Zeqing^4
,,
Yan Jun^5
,,
Yang Jiamin^{1, 2
,
,
,}

1.
Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China
2.
National Key Laboratory of Plasma Physics, China Academy of Engineering Physics, Mianyang 621900, China
3.
Shanghai EBIT Laboratory, and Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China
4.
Beijing Institute of Applied Physics and Computation Mathematics, Beijing 100088, China
5.
HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100871, China

More Information

Corresponding author: a)Authors to whom correspondence should be addressed: stm99@tsinghua.org.cn and yjm70018@sina.cn
Received Date: 2025-09-30
Accepted Date: 2025-12-08

Available Online: 2026-05-11

Publish Date: 2026-03-01

Abstract

Abstract

Low-density non–local-thermodynamic-equilibrium plasmas in intense radiation fields occur widely in inertial confinement fusion and astrophysics. Understanding the X-ray spectrum and the atomic kinetics of such plasmas is therefore of great importance. However, the creation of uniform-density nonequilibrium plasmas in intense radiation fields in the laboratory and the measurement of their spectra with high resolution are challenging tasks. Here, we present a new method to produce such a uniform aluminum plasma and explore photon-induced kinetics and relevant atomic physics by measuring its spectrum. It is observed that in the presence of an external radiation field, the satellites q, r and a–d of the He-α resonance line are greatly enhanced compared with the satellites j, k, l. Analysis of atomic kinetics reveals that this effect of intense radiation is due to competition between the photoexcitation and autoionization processes. With this effect taken into account, simulated spectra are able to reproduce the measured spectra quite well.

Conflict of Interest
The authors have no conflicts to disclose.
Author Contributions
Chengwu Huang: Conceptualization (equal); Data curation (equal); Formal analysis (equal); Investigation (equal); Writing – original draft (equal); Writing – review & editing (equal). Tuo Zhu: Data curation (equal); Formal analysis (equal); Writing – original draft (equal). Yuxue Zhang: Formal analysis (equal); Visualization (equal); Writing – original draft (equal). Tianming Song: Data curation (equal); Investigation (equal); Software (equal); Writing – original draft (equal); Writing – review & editing (equal). Yang Zhao: Formal analysis (equal); Methodology (equal). Jiyan Zhang: Data curation (equal); Methodology (equal). Zhiyu Zhang: Data curation (equal); Formal analysis (equal). Gang Xiong: Data curation (equal); Formal analysis (equal). Bo Qing: Data curation (equal); Writing – original draft (equal). Yan Zhao: Data curation (equal); Formal analysis (equal). Liling Li: Formal analysis (equal). Minxi Wei: Resources (equal). Zeqing Wu: Software (equal); Writing – original draft (equal). Jun Yan: Software (equal); Writing – original draft (equal). Jiamin Yang: Conceptualization (equal); Formal analysis (equal); Funding acquisition (equal); Writing – original draft (equal); Writing – review & editing (equal).
The data that support the findings of this study are available from the corresponding author upon reasonable request.

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References(31)

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