Planarization of Isolated Defects on ICF Target Capsule Surfaces by Pulsed Laser Ablation
Abstract
Demanding surface quality requirements for inertial confinement fusion (ICF) capsules motivated the development of a pulsed laser ablation method to reduce or eliminate undesirable surface defects. The pulsed laser ablation technique takes advantage of a full surface (4π) capsule manipulation system working in combination with an optical profiling (confocal) microscope. Based on the defect topography, the material removal rate, the laser pulse energy and its beam profile, a customized laser raster pattern is derived to remove the defect. The pattern is a table of coordinates and number of pulses that dictate how the defect will be vaporized until its height is level with the capsule surface. This paper explains how the raster patterns are optimized to minimize surface roughness and how surface roughness after laser ablation is simulated. The simulated surfaces are compared with actual ablated surfaces. Large defects are reduced to a size regime where a tumble finishing process produces very high quality surfaces devoid of high mode defects. The combined polishing processes of laser ablation and tumble finishing have become routine fabrication steps for National Ignition Facility capsule production.
- Authors:
-
- General Atomics, San Diego, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1305812
- Report Number(s):
- LLNL-JRNL-677154
Journal ID: ISSN 1536-1055; TRN: US1700141
- Grant/Contract Number:
- AC52-07NA27344; NA0001808
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Fusion Science and Technology
- Additional Journal Information:
- Journal Volume: 70; Journal Issue: 2; Journal ID: ISSN 1536-1055
- Publisher:
- American Nuclear Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Laser ablation; ICF capsulesl Surface finish
Citation Formats
Alfonso, Noel, Carlson, Lane C., and Bunn, Thomas L. Planarization of Isolated Defects on ICF Target Capsule Surfaces by Pulsed Laser Ablation. United States: N. p., 2016.
Web. doi:10.13182/FST15-224.
Alfonso, Noel, Carlson, Lane C., & Bunn, Thomas L. Planarization of Isolated Defects on ICF Target Capsule Surfaces by Pulsed Laser Ablation. United States. https://doi.org/10.13182/FST15-224
Alfonso, Noel, Carlson, Lane C., and Bunn, Thomas L. Tue .
"Planarization of Isolated Defects on ICF Target Capsule Surfaces by Pulsed Laser Ablation". United States. https://doi.org/10.13182/FST15-224. https://www.osti.gov/servlets/purl/1305812.
@article{osti_1305812,
title = {Planarization of Isolated Defects on ICF Target Capsule Surfaces by Pulsed Laser Ablation},
author = {Alfonso, Noel and Carlson, Lane C. and Bunn, Thomas L.},
abstractNote = {Demanding surface quality requirements for inertial confinement fusion (ICF) capsules motivated the development of a pulsed laser ablation method to reduce or eliminate undesirable surface defects. The pulsed laser ablation technique takes advantage of a full surface (4π) capsule manipulation system working in combination with an optical profiling (confocal) microscope. Based on the defect topography, the material removal rate, the laser pulse energy and its beam profile, a customized laser raster pattern is derived to remove the defect. The pattern is a table of coordinates and number of pulses that dictate how the defect will be vaporized until its height is level with the capsule surface. This paper explains how the raster patterns are optimized to minimize surface roughness and how surface roughness after laser ablation is simulated. The simulated surfaces are compared with actual ablated surfaces. Large defects are reduced to a size regime where a tumble finishing process produces very high quality surfaces devoid of high mode defects. The combined polishing processes of laser ablation and tumble finishing have become routine fabrication steps for National Ignition Facility capsule production.},
doi = {10.13182/FST15-224},
journal = {Fusion Science and Technology},
number = 2,
volume = 70,
place = {United States},
year = {Tue Aug 09 00:00:00 EDT 2016},
month = {Tue Aug 09 00:00:00 EDT 2016}
}
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Works referenced in this record:
Progress towards ignition on the National Ignition Facility
journal, July 2013
- Edwards, M. J.; Patel, P. K.; Lindl, J. D.
- Physics of Plasmas, Vol. 20, Issue 7
The physics basis for ignition using indirect-drive targets on the National Ignition Facility
journal, February 2004
- Lindl, John D.; Amendt, Peter; Berger, Richard L.
- Physics of Plasmas, Vol. 11, Issue 2
Onset of Hydrodynamic Mix in High-Velocity, Highly Compressed Inertial Confinement Fusion Implosions
journal, August 2013
- Ma, T.; Patel, P. K.; Izumi, N.
- Physical Review Letters, Vol. 111, Issue 8
Hot-Spot Mix in Ignition-Scale Inertial Confinement Fusion Targets
journal, July 2013
- Regan, S. P.; Epstein, R.; Hammel, B. A.
- Physical Review Letters, Vol. 111, Issue 4
Hot-spot mix in ignition-scale implosions on the NIF
journal, May 2012
- Regan, S. P.; Epstein, R.; Hammel, B. A.
- Physics of Plasmas, Vol. 19, Issue 5
High-mode Rayleigh-Taylor growth in NIF ignition capsules
journal, June 2010
- Hammel, B. A.; Haan, S. W.; Clark, D. S.
- High Energy Density Physics, Vol. 6, Issue 2
Effects of coating pressure on the thermal and mechanical properties of glow discharge polymer films
journal, July 2011
- Yan, J. C.; He, Z. B.; Wei, J. J.
- Diamond and Related Materials, Vol. 20, Issue 7
Gas Etching to Obtain Germanium Doped CH x Microshells Compatible with the Laser Megajoule Target Specifications
journal, May 2006
- Theobald, M.; Chicanne, C.; Barnouin, J.
- Fusion Science and Technology, Vol. 49, Issue 4
Progress in 2 mm Glow Discharge Polymer Mandrel Development for NIF
journal, March 2004
- Nikroo, A.; Bousquet, J.; Cook, R.
- Fusion Science and Technology, Vol. 45, Issue 2
Macromolecular plasma-chemistry: an emerging field of polymer science
journal, August 2004
- Denes, F.
- Progress in Polymer Science, Vol. 29, Issue 8
Fabrication of Thin Walled Glow Discharge Polymer Shells
journal, July 2000
- Nikroo, A.; Pontelandolfo, J. M.
- Fusion Technology, Vol. 38, Issue 1
The PAMS/GDP Process for Production of ICF Target Mandrels
journal, July 1997
- McQuillan, B. W.; Nikroo, A.; Steinman, D. A.
- Fusion Technology, Vol. 31, Issue 4
Fabrication of Polymer Shells Using a Depolymerizable Mandrel
journal, December 1995
- Letts, Stephan A.; Fearon, Evelyn M.; Buckley, Steven R.
- Fusion Technology, Vol. 28, Issue 5
Preparation of Hollow Shell ICF Targets Using A Depolymerizing Mandrel
journal, January 1994
- Letts, Stephan A.; Fearon, E. M.; Buckley, S. R.
- MRS Proceedings, Vol. 372
Ultrasmooth plasma polymerized coatings for laser fusion targets
journal, September 1981
- Letts, S. A.; Myers, D. W.; Witt, L. A.
- Journal of Vacuum Science and Technology, Vol. 19, Issue 3
CH Capsule Fabrication for Ignition Tuning Campaign
journal, January 2011
- Chen, K. C.; Moreno, K. A.; Lee, Y. T.
- Fusion Science and Technology, Vol. 59, Issue 1
Reduction of Isolated Defects on Ge Doped CH Capsules to Below Ignition Specifications
journal, May 2007
- Chen, K. C.; Lee, Y. T.; Huang, H.
- Fusion Science and Technology, Vol. 51, Issue 4
Status of the development of ignition capsules in the U.S. effort to achieve thermonuclear ignition on the national ignition facility
journal, October 2006
- Nobile, A.; Nikroo, A.; Cook, R. C.
- Laser and Particle Beams, Vol. 24, Issue 4
Diamond Ablators for Inertial Confinement Fusion
journal, May 2006
- Biener, Juergen; Mirkarimi, Paul B.; Tringe, Joseph W.
- Fusion Science and Technology, Vol. 49, Issue 4
Bounce Coating Induced Domes on Glow Discharge Polymer Coated Shells
journal, March 1999
- Nikroo, A.; Woodhouse, D.
- Fusion Technology, Vol. 35, Issue 2
A comparison of three-dimensional multimode hydrodynamic instability growth on various National Ignition Facility capsule designs with HYDRA simulations
journal, April 1998
- Marinak, M. M.; Haan, S. W.; Dittrich, T. R.
- Physics of Plasmas, Vol. 5, Issue 4
Polishing and local planarization of plastic spherical capsules using tumble finishing
journal, November 2012
- Suratwala, T. I.; Steele, W. A.; Feit, M. D.
- Applied Surface Science, Vol. 261
Point design targets, specifications, and requirements for the 2010 ignition campaign on the National Ignition Facility
journal, May 2011
- Haan, S. W.; Lindl, J. D.; Callahan, D. A.
- Physics of Plasmas, Vol. 18, Issue 5
NIF Ignition Target Requirements, Margins, and Uncertainties: Status February 2010
journal, January 2011
- Haan, S. W.; Salmonson, J. D.; Clark, D. S.
- Fusion Science and Technology, Vol. 59, Issue 1
Update on Specifications for NIF Ignition Targets
journal, May 2007
- Haan, S. W.; Amendt, P. A.; Callahan, D. A.
- Fusion Science and Technology, Vol. 51, Issue 4
Update on Specifications for NIF Ignition Targets, and Their Rollup into an Error Budget
journal, May 2006
- Haan, S. W.; Herrmann, M. C.; Amendt, P. A.
- Fusion Science and Technology, Vol. 49, Issue 4
Update on NIF Indirect Drive Ignition Target Fabrication Specifications
journal, March 2004
- Haan, S. W.; Amendt, P. A.; Dittrich, T. R.
- Fusion Science and Technology, Vol. 45, Issue 2
Update on Ignition Target Fabrication Specifications
journal, May 2002
- Haan, S. W.; Dittrich, T.; Strobel, G.
- Fusion Science and Technology, Vol. 41, Issue 3P1
Investigations to Remove Domes from Plastic Shells by Polishing
journal, May 2007
- Czechowicz, D. G.; Chen, C. J.; Dorman, J. A.
- Fusion Science and Technology, Vol. 51, Issue 4
Chemical and Spectroscopic Aspects of Polymer Ablation: Special Features and Novel Directions
journal, February 2003
- Lippert, Thomas; Dickinson, J. Thomas
- Chemical Reviews, Vol. 103, Issue 2
Ultra-short pulsed laser ablation of polymers
journal, August 2001
- Serafetinides, A. A.; Makropoulou, M. I.; Skordoulis, C. D.
- Applied Surface Science, Vol. 180, Issue 1-2
Laser Ablation of Doped Polymer Systems
journal, February 1997
- Lippert, Thomas; Yabe, Akira; Wokaun, Alexander
- Advanced Materials, Vol. 9, Issue 2
Laser ablation of polymers
journal, May 1986
- Yeh, J. T. C.
- Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 4, Issue 3
Pulsed laser processing of shallow micro-optical structures
conference, March 2007
- Pedder, J. E. A.; Holmes, A. S.
- Lasers and Applications in Science and Engineering, SPIE Proceedings
Recent developments on microablation of glass materials using excimer lasers
journal, October 2007
- Tseng, Ampere A.; Chen, Ying-Tung; Chao, Choung-Lii
- Optics and Lasers in Engineering, Vol. 45, Issue 10
Time scale effects in laser material removal: a review
journal, November 2004
- Yao, Y. Lawrence; Chen, Hongqiang; Zhang, Wenwu
- The International Journal of Advanced Manufacturing Technology, Vol. 26, Issue 5-6
Laser Machining for Fabrication of Hohlraums and Capsules
journal, May 2006
- Shirk, M. D.; Kelly, B. T.; Haynes, S. M.
- Fusion Science and Technology, Vol. 49, Issue 4
Formation mechanisms of sub-wavelength ripples during femtosecond laser pulse train processing of dielectrics
journal, April 2012
- Yuan, Yanping; Jiang, Lan; Li, Xin
- Journal of Physics D: Applied Physics, Vol. 45, Issue 17
Sub-wavelength ripples in fused silica after irradiation of the solid/liquid interface with ultrashort laser pulses
journal, November 2008
- Böhme, R.; Vass, C.; Hopp, B.
- Nanotechnology, Vol. 19, Issue 49
Automated ICF Capsule Characterization Using Confocal Surface Profilometry
journal, April 2013
- Antipa, N. A.; Baxamusa, S. H.; Buice, E. S.
- Fusion Science and Technology, Vol. 63, Issue 2
Visualization of target inspection data at the National Ignition Facility
journal, December 2012
- Potter, Daniel; Antipa, Nick
- Fusion Engineering and Design, Vol. 87, Issue 12
Convergence Properties of the Nelder--Mead Simplex Method in Low Dimensions
journal, January 1998
- Lagarias, Jeffrey C.; Reeds, James A.; Wright, Margaret H.
- SIAM Journal on Optimization, Vol. 9, Issue 1
A Solvent Cleaning Process for the Outer Surface of Plastic ICF Capsules
journal, April 2013
- Baxamusa, S. H.; Bhandarkar, S. D.; Reynolds, J. L.
- Fusion Science and Technology, Vol. 63, Issue 2
Local adaptive mesh refinement for shock hydrodynamics
journal, May 1989
- Berger, M. J.; Colella, P.
- Journal of Computational Physics, Vol. 82, Issue 1
Novel process for figuring and polishing diamond surfaces
conference, July 1994
- Holly, Sandor; Koumvakalis, Nicholas
- Laser-Induced Damage in Optical Materials: 1993, SPIE Proceedings
Automation of NIF Target Characterization and Laser Ablation of Domes Using the 4pi System
journal, May 2015
- Carlson, L. C.; Alfonso, E. L.; Huang, H.
- Fusion Science and Technology, Vol. 67, Issue 4