Abstract A study of X-ray emissions from Al/Mg tracers buried at two different depths in a plastic shell is presented. The X-rays originating from the K-shell transitions of the Al/Mg ions begin to irradiate after the ablative heating wave has passed through the trace layer and are recorded with a streaked crystal spectrometer. Only emissions from the capsule with the trace layer buried at a smaller depth are observed. Hydrodynamic simulations and a collisional—radiative model including detailed atomic physics are used to investigate the measured spectrum. It is found that the effects of the radiative heating play important roles in the formation of the K-shell emission. The time correlation between the simulations and the measurements is obtained by comparing the measured time profile of the He α emission with the calculated one. The line ratio of Ly to He is also calculated and is found to be in fairly good agreement with the experimental data. Finally, the relation between the time profile of the He α emission and the ablation velocity is also discussed.
Pu Yu-Dong(蒲昱东), Chen Bo-Lun(陈伯伦), Zhang Lu(张璐), Yang Jia-Ming(杨家敏), Huang Tian-Xuan(黄天晅), and Ding Yong-Kun(丁永坤) Emission spectrum from an Al/Mg tracer in the blow-off region of a radiatively ablated capsule 2011 Chin. Phys. B 20 095203
[1]
Herrmann M C, Tabak M and Lindl J D 2001 Nuclear Fusion 41 99
[2]
Anderson K and Betti R 2004 Phys. Plasmas 11 5
[3]
Lindl J D, Amendt P and Berger R L 2004 Phys. Plasmas 11 339
[4]
Olson T 2004 Phys. Plasmas 11 2278
[5]
Jiang S E and Li S W 2009 Acta Phys. Sin. 58 8440 (in Chinese)
[6]
Zhang J Y and Yang G H 2010 Phys. Plasmas 17 113302
[7]
Mihalas D 1984 Foundations of Radiation Hydrodynamics (New York: Oxford University Press)
[8]
Ramis R, Schmaltz R F and Meyer-ter-Vehn J 1988 J. Comp. Phys. Comm. 49 475
[9]
Lee R W, Whitten B L and Stout II R E 1984 J. Quant. Spect. Radiat. Transfer 32 91
[10]
Li J, Xie W P and Huang X B 2010 Acta Phys. Sin. 59 7922 (in Chinese)
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
