Capsule implosions for continuum x-ray backlighting of opacity samples at the National Ignition Facility

Physics of Plasmas
Y P OpachichT S Perry

Abstract

Direct drive implosions of plastic capsules have been performed at the National Ignition Facility to provide a broad-spectrum (500-2000 eV) X-ray continuum source for X-ray transmission spectroscopy. The source was developed for the high-temperature plasma opacity experimental platform. Initial experiments using 2.0 mm diameter polyalpha-methyl styrene capsules with ∼20 μm thickness have been performed. X-ray yields of up to ∼1 kJ/sr have been measured using the Dante multichannel diode array. The backlighter source size was measured to be ∼100 μm FWHM, with ∼350 ps pulse duration during the peak emission stage. Results are used to simulate transmission spectra for a hypothetical iron opacity sample at 150 eV, enabling the derivation of photometrics requirements for future opacity experiments.

References

Dec 30, 1991·Physical Review Letters·T S PerryR W Lee
Feb 1, 2008·Physical Review Letters·J E BaileyS Mazevet
Dec 3, 2008·The Review of Scientific Instruments·Achim Seifter, George A Kyrala
Nov 7, 2012·The Review of Scientific Instruments·L R BenedettiR Thomas
Jan 3, 2013·The Review of Scientific Instruments·Y P OpachichO Landen
Jan 7, 2014·The Review of Scientific Instruments·Y PingG W Collins
Oct 3, 2014·The Review of Scientific Instruments·K A FlippoJ R Fincke
Dec 3, 2016·The Review of Scientific Instruments·P W RossT S Perry

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Citations

Nov 8, 2018·The Review of Scientific Instruments·J A KingT S Perry
Apr 7, 2021·The Review of Scientific Instruments·Y P OpachichT S Perry

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