Fluorescence based imaging for M-band drive symmetry measurement in hohlraum

We describe an experimental technique to measure the drive symmetry of M-band radiation on the capsule in hohlraum. M-band radiation from the corona of the laser-produced gold plasma, especially the laser spot regions in the cavity, was used to pump x-ray fluorescence of a thin layer of Si-tracer co...

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Veröffentlicht in:Physics of plasmas 2016-11, Vol.23 (11)
Hauptverfasser: Li, Qi, Yao, Li, Jing, Longfei, Hu, Zhimin, Huang, Chengwu, Yuan, Zheng, Zhao, Yang, Xiong, Gang, Qing, Bo, Lv, Min, Zhu, Tuo, Deng, Bo, Li, Jin, Wei, Minxi, Zhan, Xiayu, Li, Jun, Yang, Yimeng, Su, Chunxiao, Yang, Guohong, Zhang, Jiyan, Li, Sanwei, Yang, Jiamin, Ding, Yongkun
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Sprache:eng
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Zusammenfassung:We describe an experimental technique to measure the drive symmetry of M-band radiation on the capsule in hohlraum. M-band radiation from the corona of the laser-produced gold plasma, especially the laser spot regions in the cavity, was used to pump x-ray fluorescence of a thin layer of Si-tracer coated on a solid CH-ball. The fluorescence images were time resolvedly recorded by an x-ray framing camera and the drive asymmetry due to M-band radiation was deduced from these fluorescence images. Moreover, a Si-doped gold cavity was used with the initial purpose of maximizing the fluorescence signal through resonance transitions. Since the Si-plasma expands more rapidly than the gold-plasma, the evolution of drive asymmetry was accelerated in Si-doped hohlraum.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4968519