Measurements of the ablation-front trajectory and low-mode nonuniformity in direct-drive implosions using x-ray self-emission shadowgraphy
Abstract
Self-emission x-ray shadowgraphy provides a method to measure the ablation-front trajectory and low-mode nonuniformity of a target imploded by directly illuminating a fusion capsule with laser beams. The technique uses time-resolved images of soft x-rays (> 1 keV) emitted from the coronal plasma of the target imaged onto an x-ray framing camera to determine the position of the ablation front. Methods used to accurately measure the ablation-front radius ($${\it\delta}R=\pm 1.15~{\rm\mu}\text{m}$$), image-to-image timing ($${\it\delta}({\rm\Delta}t)=\pm 2.5$$ ps) and absolute timing ($${\it\delta}t=\pm 10$$ ps) are presented. Angular averaging of the images provides an average radius measurement of$${\it\delta}(R_{\text{av}})=\pm 0.15~{\rm\mu}\text{m}$$and an error in velocity of$${\it\delta}V/V=\pm 3\%$$. This technique was applied on the Omega Laser Facility and the National Ignition Facility.
- Authors:
-
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Publication Date:
- Research Org.:
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1214212
- Grant/Contract Number:
- NA0001944
- Resource Type:
- Accepted Manuscript
- Journal Name:
- High Power Laser Science and Engineering
- Additional Journal Information:
- Journal Volume: 3; Journal ID: ISSN 2095-4719
- Publisher:
- Cambridge University Press
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; low mode nonuiformity; nuclear fusion; self-emission shadowgraphy; shell trajectory
Citation Formats
Michel, D. T., Davis, A. K., Armstrong, W., Bahr, R., Epstein, R., Goncharov, V. N., Hohenberger, M., Igumenshchev, I. V., Jungquist, R., Meyerhofer, D. D., Radha, P. B., Sangster, T. C., Sorce, C., and Froula, D. H. Measurements of the ablation-front trajectory and low-mode nonuniformity in direct-drive implosions using x-ray self-emission shadowgraphy. United States: N. p., 2015.
Web. doi:10.1017/hpl.2015.15.
Michel, D. T., Davis, A. K., Armstrong, W., Bahr, R., Epstein, R., Goncharov, V. N., Hohenberger, M., Igumenshchev, I. V., Jungquist, R., Meyerhofer, D. D., Radha, P. B., Sangster, T. C., Sorce, C., & Froula, D. H. Measurements of the ablation-front trajectory and low-mode nonuniformity in direct-drive implosions using x-ray self-emission shadowgraphy. United States. https://doi.org/10.1017/hpl.2015.15
Michel, D. T., Davis, A. K., Armstrong, W., Bahr, R., Epstein, R., Goncharov, V. N., Hohenberger, M., Igumenshchev, I. V., Jungquist, R., Meyerhofer, D. D., Radha, P. B., Sangster, T. C., Sorce, C., and Froula, D. H. Wed .
"Measurements of the ablation-front trajectory and low-mode nonuniformity in direct-drive implosions using x-ray self-emission shadowgraphy". United States. https://doi.org/10.1017/hpl.2015.15. https://www.osti.gov/servlets/purl/1214212.
@article{osti_1214212,
title = {Measurements of the ablation-front trajectory and low-mode nonuniformity in direct-drive implosions using x-ray self-emission shadowgraphy},
author = {Michel, D. T. and Davis, A. K. and Armstrong, W. and Bahr, R. and Epstein, R. and Goncharov, V. N. and Hohenberger, M. and Igumenshchev, I. V. and Jungquist, R. and Meyerhofer, D. D. and Radha, P. B. and Sangster, T. C. and Sorce, C. and Froula, D. H.},
abstractNote = {Self-emission x-ray shadowgraphy provides a method to measure the ablation-front trajectory and low-mode nonuniformity of a target imploded by directly illuminating a fusion capsule with laser beams. The technique uses time-resolved images of soft x-rays (> 1 keV) emitted from the coronal plasma of the target imaged onto an x-ray framing camera to determine the position of the ablation front. Methods used to accurately measure the ablation-front radius (${\it\delta}R=\pm 1.15~{\rm\mu}\text{m}$), image-to-image timing (${\it\delta}({\rm\Delta}t)=\pm 2.5$ ps) and absolute timing (${\it\delta}t=\pm 10$ ps) are presented. Angular averaging of the images provides an average radius measurement of${\it\delta}(R_{\text{av}})=\pm 0.15~{\rm\mu}\text{m}$and an error in velocity of${\it\delta}V/V=\pm 3\%$. This technique was applied on the Omega Laser Facility and the National Ignition Facility.},
doi = {10.1017/hpl.2015.15},
journal = {High Power Laser Science and Engineering},
number = ,
volume = 3,
place = {United States},
year = {Wed Jul 08 00:00:00 EDT 2015},
month = {Wed Jul 08 00:00:00 EDT 2015}
}
Web of Science
Works referenced in this record:
High‐speed gated x‐ray imaging for ICF target experiments (invited)
journal, October 1992
- Bradley, D. K.; Bell, P. M.; Kilkenny, J. D.
- Review of Scientific Instruments, Vol. 63, Issue 10
Development and characterization of a pair of 30–40 ps x‐ray framing cameras
journal, January 1995
- Bradley, D. K.; Bell, P. M.; Landen, O. L.
- Review of Scientific Instruments, Vol. 66, Issue 1
Characterization of an x-ray radiographic system used for laser-driven planar target experiments
journal, January 1999
- Smalyuk, V. A.; Boehly, T. R.; Bradley, D. K.
- Review of Scientific Instruments, Vol. 70, Issue 1
Polar direct drive on the National Ignition Facility
journal, May 2004
- Skupsky, S.; Marozas, J. A.; Craxton, R. S.
- Physics of Plasmas, Vol. 11, Issue 5, p. 2763-2770
Phase conversion of lasers with low-loss distributed phase plates
conference, May 1993
- Kessler, Terrance J.; Lin, Ying; Armstrong, J. Joseph
- OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering, SPIE Proceedings
Shell trajectory measurements from direct-drive implosion experiments
journal, October 2012
- Michel, D. T.; Sorce, C.; Epstein, R.
- Review of Scientific Instruments, Vol. 83, Issue 10
Direct-drive-implosion experiments with enhanced fluence balance on OMEGA
journal, January 2004
- Marshall, F. J.; Delettrez, J. A.; Epstein, R.
- Physics of Plasmas, Vol. 11, Issue 1
Implosion dynamics in direct-drive experiments
journal, November 2014
- Michel, D. T.; Craxton, R. S.; Davis, A. K.
- Plasma Physics and Controlled Fusion, Vol. 57, Issue 1
Crossed-beam energy transfer in direct-drive implosions
journal, May 2012
- Igumenshchev, I. V.; Seka, W.; Edgell, D. H.
- Physics of Plasmas, Vol. 19, Issue 5, Article No. 056314
Polar-direct-drive experiments on the National Ignition Facilitya)
journal, May 2015
- Hohenberger, M.; Radha, P. B.; Myatt, J. F.
- Physics of Plasmas, Vol. 22, Issue 5
Initial performance results of the OMEGA laser system
journal, January 1997
- Boehly, T. R.; Brown, D. L.; Craxton, R. S.
- Optics Communications, Vol. 133, Issue 1-6
Thermal electron transport in direct-drive laser fusion
journal, August 1986
- Delettrez, J.
- Canadian Journal of Physics, Vol. 64, Issue 8
Performance of direct-drive cryogenic targets on OMEGA
journal, May 2008
- Goncharov, V. N.; Sangster, T. C.; Radha, P. B.
- Physics of Plasmas, Vol. 15, Issue 5
Reduction of laser imprinting using polarization smoothing on a solid-state fusion laser
journal, April 1999
- Boehly, T. R.; Smalyuk, V. A.; Meyerhofer, D. D.
- Journal of Applied Physics, Vol. 85, Issue 7
Improved laser‐beam uniformity using the angular dispersion of frequency‐modulated light
journal, October 1989
- Skupsky, S.; Short, R. W.; Kessler, T.
- Journal of Applied Physics, Vol. 66, Issue 8
Laser Compression of Matter to Super-High Densities: Thermonuclear (CTR) Applications
journal, September 1972
- Nuckolls, John; Wood, Lowell; Thiessen, Albert
- Nature, Vol. 239, Issue 5368, p. 139-142
A generalized scaling law for the ignition energy of inertial confinement fusion capsules
journal, January 2001
- Herrmann, M. C.; Tabak, M.; Lindl, J. D.
- Nuclear Fusion, Vol. 41, Issue 1
SPECT3D – A multi-dimensional collisional-radiative code for generating diagnostic signatures based on hydrodynamics and PIC simulation output
journal, May 2007
- MacFarlane, J. J.; Golovkin, I. E.; Wang, P.
- High Energy Density Physics, Vol. 3, Issue 1-2
The National Ignition Facility - applications for inertial fusion energy and high-energy-density science
journal, December 1999
- Campbell, E. Michael; Hogan, William J.
- Plasma Physics and Controlled Fusion, Vol. 41, Issue 12B
Demonstration of the Improved Rocket Efficiency in Direct-Drive Implosions Using Different Ablator Materials
journal, December 2013
- Michel, D. T.; Goncharov, V. N.; Igumenshchev, I. V.
- Physical Review Letters, Vol. 111, Issue 24
Demonstration of the Highest Deuterium-Tritium Areal Density Using Multiple-Picket Cryogenic Designs on OMEGA
journal, April 2010
- Goncharov, V. N.; Sangster, T. C.; Boehly, T. R.
- Physical Review Letters, Vol. 104, Issue 16
Works referencing / citing this record:
Enhanced hot-electron production and strong-shock generation in hydrogen-rich ablators for shock ignition
journal, December 2017
- Theobald, W.; Bose, A.; Yan, R.
- Physics of Plasmas, Vol. 24, Issue 12
Inferred UV fluence focal-spot profiles from soft x-ray pinhole-camera measurements on OMEGA
journal, February 2020
- Theobald, W.; Sorce, C.; Donaldson, W. R.
- Review of Scientific Instruments, Vol. 91, Issue 2
Tripled yield in direct-drive laser fusion through statistical modelling
journal, January 2019
- Gopalaswamy, V.; Betti, R.; Knauer, J. P.
- Nature, Vol. 565, Issue 7741
Time history prediction of direct-drive implosions on the Omega facility
journal, January 2016
- Laffite, S.; Bourgade, J. L.; Caillaud, T.
- Physics of Plasmas, Vol. 23, Issue 1
Impact of imposed mode 2 laser drive asymmetry on inertial confinement fusion implosions
journal, January 2019
- Gatu Johnson, M.; Appelbe, B. D.; Chittenden, J. P.
- Physics of Plasmas, Vol. 26, Issue 1
Measuring implosion velocities in experiments and simulations of laser-driven cylindrical implosions on the OMEGA laser
journal, April 2018
- Hansen, E. C.; Barnak, D. H.; Betti, R.
- Plasma Physics and Controlled Fusion, Vol. 60, Issue 5
Three-dimensional hydrodynamic simulations of OMEGA implosions
journal, May 2017
- Igumenshchev, I. V.; Michel, D. T.; Shah, R. C.
- Physics of Plasmas, Vol. 24, Issue 5
Optimization of laser-driven cylindrical implosions on the OMEGA laser
journal, December 2018
- Hansen, E. C.; Barnak, D. H.; Chang, P. -Y.
- Physics of Plasmas, Vol. 25, Issue 12