X-ray streaked refraction enhanced radiography for inferring inflight density gradients in ICF capsule implosions

Dewald, E. L.; Landen, O. L.; Masse, L.; Ho, D.; Ping, Y.; Thorn, D.; Izumi, N.; Berzak Hopkins, L.; Kroll, J.; Nikroo, A.; Koch, J. A.

doi:10.1063/1.5039346

Title: X-ray streaked refraction enhanced radiography for inferring inflight density gradients in ICF capsule implosions

Journal Article · Mon Oct 01 00:00:00 EDT 2018 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.5039346· OSTI ID:1477148

Dewald, E. L. ^[1];

^[1];

^[1]; Ho, D. ^[1]; Ping, Y. ^[1]; Thorn, D. ^[1];

^[1];

^[1]; Kroll, J. ^[1];

^[1]; Koch, J. A. ^[2]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Nevada National Security Site, Livermore, CA (United States)

In the quest for reaching ignition of deuterium-tritium (DT) fuel capsule implosions, experiments on the National Ignition Facility (NIF) have shown lower final fuel areal densities than simulated. Possible explanations for reduced compression are higher preheat that can increase the ablator-DT ice density jump and induce mix at that interface or reverberating shocks. We are hence developing x-ray Refraction Enhanced Radiography (RER) to infer the inflight density profiles in layered fuel capsule implosions. We use a 5 μm slit backlit by a Ni 7.8 keV He-α NIF laser driven x-ray source positioned at 20 mm from the capsule to cast refracted images of the inflight capsule onto a streak camera in a high magnification (M ~ 60×) setup. Our first experiments have validated our setup that recorded a streaked x-ray fringe pattern from an undriven high density carbon (HDC) capsule consistent with ray tracing calculations at the required ~6 μm and 25 ps resolution. Streaked RER was then applied to inflight layered HDC capsule implosions using a hydrogen-tritium fuel mix rather than DT to reduce neutron yields and associated backgrounds. The first RER of an imploding capsule revealed strong features associated with the ablation front and ice-ablator interface that are not visible in standard absorption radiographs.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1477148

Alternate ID(s):: OSTI ID: 1471145

Report Number(s):: LLNL-JRNL-750878; 936350

Journal Information:: Review of Scientific Instruments, Vol. 89, Issue 10; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 14 works

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References (17)

Refraction-enhanced backlit imaging of axially symmetric inertial confinement fusion plasmas Koch, Jeffrey A.; Landen, Otto L.; Suter, Laurence J. Applied Optics, Vol. 52, Issue 15 https://doi.org/10.1364/ao.52.003538	journal	January 2013
X-ray induced pinhole closure in point-projection x-ray radiography Bullock, A. B.; Landen, O. L.; Blue, B. E. Journal of Applied Physics, Vol. 100, Issue 4 https://doi.org/10.1063/1.2229737	journal	August 2006
Review of the National Ignition Campaign 2009-2012 Lindl, John; Landen, Otto; Edwards, John Physics of Plasmas, Vol. 21, Issue 2 https://doi.org/10.1063/1.4865400	journal	February 2014
Refraction-enhanced x-ray radiography for density profile measurements at CH/Be interface Ping, Y.; Landen, O. L.; Hicks, D. G. Journal of Instrumentation, Vol. 6, Issue 09 https://doi.org/10.1088/1748-0221/6/09/p09004	journal	September 2011
The NIF x-ray spectrometer calibration campaign at Omega Pérez, F.; Kemp, G. E.; Regan, S. P. Review of Scientific Instruments, Vol. 85, Issue 11 https://doi.org/10.1063/1.4891054	journal	November 2014
Cryogenic tritium-hydrogen-deuterium and deuterium-tritium layer implosions with high density carbon ablators in near-vacuum hohlraums Meezan, N. B.; Berzak Hopkins, L. F.; Le Pape, S. Physics of Plasmas, Vol. 22, Issue 6 https://doi.org/10.1063/1.4921947	journal	June 2015
Capsule Ablator Inflight Performance Measurements Via Streaked Radiography Of ICF Implosions On The NIF* Dewald, E. L.; Tommasini, R.; Mackinnon, A. Journal of Physics: Conference Series, Vol. 688 https://doi.org/10.1088/1742-6596/688/1/012014	journal	March 2016
Implosion dynamics measurements at the National Ignition Facility Hicks, D. G.; Meezan, N. B.; Dewald, E. L. Physics of Plasmas, Vol. 19, Issue 12 https://doi.org/10.1063/1.4769268	journal	December 2012
Experimental study of neutron induced background noise on gated x-ray framing cameras Izumi, N.; Hagmann, C.; Stone, G. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3478636	journal	October 2010
High performance imaging streak camera for the National Ignition Facility Opachich, Y. P.; Kalantar, D. H.; MacPhee, A. G. Review of Scientific Instruments, Vol. 83, Issue 12 https://doi.org/10.1063/1.4769753	journal	December 2012
Evaluation of the sensitivity and fading characteristics of an image plate system for x-ray diagnostics Meadowcroft, A. L.; Bentley, C. D.; Stott, E. N. Review of Scientific Instruments, Vol. 79, Issue 11 https://doi.org/10.1063/1.3013123	journal	November 2008
Quantitative characterization of inertial confinement fusion capsules using phase contrast enhanced x-ray imaging Kozioziemski, B. J.; Koch, J. A.; Barty, A. Journal of Applied Physics, Vol. 97, Issue 6 https://doi.org/10.1063/1.1862764	journal	March 2005
Backlighter development at the National Ignition Facility (NIF): Zinc to zirconium Barrios, M. A.; Fournier, K. B.; Regan, S. P. High Energy Density Physics, Vol. 9, Issue 3 https://doi.org/10.1016/j.hedp.2013.05.018	journal	September 2013
Symmetry control of an indirectly driven high-density-carbon implosion at high convergence and high velocity Divol, L.; Pak, A.; Berzak Hopkins, L. F. Physics of Plasmas, Vol. 24, Issue 5 https://doi.org/10.1063/1.4982215	journal	May 2017
The National Ignition Facility: enabling fusion ignition for the 21st century Miller, George H.; Moses, Edward I.; Wuest, Craig R. Nuclear Fusion, Vol. 44, Issue 12 https://doi.org/10.1088/0029-5515/44/12/s14	journal	November 2004
HYADES—A plasma hydrodynamics code for dense plasma studies Larsen, Jon T.; Lane, Stephen M. Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 51, Issue 1-2 https://doi.org/10.1016/0022-4073(94)90078-7	journal	January 1994
Refraction-enhanced x-ray radiography for inertial confinement fusion and laser-produced plasma applications Koch, Jeffrey A.; Landen, Otto L.; Kozioziemski, Bernard J. Journal of Applied Physics, Vol. 105, Issue 11, Article No. 113112 https://doi.org/10.1063/1.3133092	journal	June 2009

Cited By (4)

Simulated refraction-enhanced X-ray radiography of laser-driven shocks Kar, Arnab; Boehly, T. R.; Radha, P. B. Physics of Plasmas, Vol. 26, Issue 3 https://doi.org/10.1063/1.5084968	journal	March 2019
Understanding ICF hohlraums using NIF gated laser-entrance-hole images Chen, Hui; Woods, D. T.; Jones, O. S. Physics of Plasmas, Vol. 27, Issue 2 https://doi.org/10.1063/1.5128501	journal	February 2020
Review of hydrodynamic instability experiments in inertially confined fusion implosions on National Ignition Facility Smalyuk, V. A.; Weber, C. R.; Landen, O. L. Plasma Physics and Controlled Fusion, Vol. 62, Issue 1 https://doi.org/10.1088/1361-6587/ab49f4	journal	October 2019
Simulated Refraction-Enhanced X-Ray Radiography of Laser-Driven Shocks Kar, Arnab; Boehly, T. R.; Radha, P. B. arXiv https://doi.org/10.48550/arxiv.1903.04020	text	January 2019

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