Volume 117, Number 6, March 2017
|Number of page(s)||6|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||19 May 2017|
K-shell photoabsorption edge of strongly coupled aluminum driven by laser-converted radiation
Research Center of Laser Fusion, China Academy of Engineering Physics P.O. Box 919-986, Mianyang 621900, China
Received: 28 February 2017
Accepted: 4 May 2017
The first observation of the K-shell photoabsorption edge of strongly coupled aluminum generated by intense x-ray radiation-driven shocks is reported. By using a “dog bone” gold hohlraum as an x-ray converter, colliding shocks compression and preheating shielding are achieved to generate an unexplored state with a density of 5.5 g/cm3 and temperature of 0.43 eV (the ion-ion coupling parameter is around 240). The time-resolved K-shell photoabsorption edges are measured with a crystal spectrometer using a short x-ray backlighter. The broadenings and redshifts of the edges are studied by using the slope fitting of the edge and quantum molecular dynamics calculations. This work shows that the K-edge of aluminum driven by laser-converted radiation provides a novel capability to probe WDM at extended conditions.
PACS: 52.50.Lp – Plasma production and heating by shock waves and compression / 32.30.Rj – X-ray spectra / 78.70.Dm – X-ray absorption spectra
© EPLA, 2017
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