Dr. Wade H. Williams Profile

Dr. Wade H. Williams

Engineer at Lawrence Livermore National Lab

SPIE Involvement:

Author

Publications (29)

SPIE Journal Paper | 23 November 2020 Open Access

Jitter-induced Max-of-N fluence distribution at the National Ignition Facility

Zhi Liao, Christopher Carr, Giuliana Pallotta, Wade Williams, Paul Wegner

OE, Vol. 60, Issue 03, 031006, (November 2020) https://doi.org/10.1117/12.10.1117/1.OE.60.3.031006

KEYWORDS: National Ignition Facility, Data modeling, Optical engineering, Laser energy, Pulsed laser operation, Laser optics, Statistical modeling, Optical simulations, Laser systems engineering, Statistical analysis

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Proceedings Article | 21 February 2020 Presentation + Paper

Spatially resolved B-integral measurements on the NIF laser

M. Erickson, S. Cohen, J. Di Nicola, J. Folta, A. Handler, T. Lanier, B. Olejniczak, C. Widmayer, W. Williams, S. Yang, P. Wegner

Proceedings Volume 11259, 1125917 (2020) https://doi.org/10.1117/12.2546818

KEYWORDS: National Ignition Facility, Sensors, Diagnostics, Beam shaping, Phase shifts, Fusion energy, Phase measurement, Wavefronts, Deformable mirrors, Kerr effect, Shearing interferometers

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Proceedings Article | 16 November 2018 Paper

Revisiting of the laser induced filamentation damage conditions in fused silica for energetic laser systems

E. Feigenbaum, W. Williams, R. Negres, M. Norton, C. Miller, G. Mennerat, C. Widmayer, C. Carr, J-M. Di Nicola, J. Bude

Proceedings Volume 10805, 108050P (2018) https://doi.org/10.1117/12.2501835

KEYWORDS: Silica, Laser systems engineering, Laser induced damage, Beam shaping, Laser energy, Data modeling, Glasses, Laser beam propagation, Physics, Diffraction

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Proceedings Article | 7 September 2018 Paper

Active learning with deep Bayesian neural network for laser control

Thomas Galvin, Sandrine Herriot, Brenda Ng, Wade Williams, Sachin Talathi, Thomas Spinka, Emily Sistrunk, Craig Siders, Constantin Haefner

Proceedings Volume 10751, 107510N (2018) https://doi.org/10.1117/12.2324364

KEYWORDS: Data modeling, Neural networks, Laser safety, Performance modeling, Machine learning, Amplifiers, Systems modeling, Pulsed laser operation

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Proceedings Article | 7 February 2006 Paper

A system for measuring defect induced beam modulation on inertial confinement fusion-class laser optics

Mike Runkel, Ruth Hawley-Fedder, Clay Widmayer, Wade Williams, Carolyn Weinzapfel, Dave Roberts

Proceedings Volume 5991, 59912H (2006) https://doi.org/10.1117/12.638824

KEYWORDS: Modulation, Diffraction, Coating, Crystals, Laser optics, Gas lasers, Image processing, Imaging systems, Laser crystals, Silica

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Proceedings Article | 26 August 2005 Paper

Laser performance operations model (LPOM): a tool to automate the setup and diagnosis of the National Ignition Facility

Michael Shaw, Wade Williams, Ronald House, Chris Haynam

Proceedings Volume 5867, 58671A (2005) https://doi.org/10.1117/12.617112

KEYWORDS: National Ignition Facility, Laser systems engineering, Diagnostics, Fusion energy, Optical amplifiers, Computing systems, Control systems, Data modeling, Performance modeling, Beam shaping

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The National Ignition Facility (NIF), currently under construction at the University of California's Lawrence Livermore National Laboratory (LLNL) is a stadium-sized facility containing a 192-beam, 1.8 Megajoule, 500-Terrawatt, 351-nm laser system together with a 10-meter diameter target chamber with room for nearly 100 experimental diagnostics. NIF is being built by the National Nuclear Security Administration and when completed will be the world's largest laser experimental system, providing a national center to study inertial confinement fusion and the physics of matter at extreme energy densities and pressures. NIF's 192 energetic laser beams will compress fusion targets to conditions where they will ignite and burn, liberating more energy than required to initiate the fusion reaction. The commissioning of the first four beamlines (a quad) was completed in October 2004 -- a two-year period where a wide variety of energetic laser pulses were propagated through the laser system. Success on many of the NIF laser's missions depends on obtaining precisely specified energy waveforms from each of the 192 beams over a wide variety of pulse lengths and temporal shapes. A computational system, the Laser Performance Operations Model (LPOM) has been developed and deployed during NIF commissioning to automate the laser setup process, and accurately predict laser energtics. For each shot on NIF, the LPOM determines the characteristics of the injection laser system required to achieve the desired main laser output, provides parameter checking for equipment protection, determines the required diagnostic setup, and supplies post-shot data analysis and reporting. LPOM was deployed prior to the first main laser shots in NIF, and has since been used to set up every shot in NIF's first quad (four beamlines). Real-time adjustments of the LPOM energetics model allows NIF to routinely deliver energies within 3%, of requested and provide energy balance within the four beamlines to within 2% for shots varying from 0.5 to 26 kJ (1.053 μm) per beamline. The LPOM has been a crucial tool in the commissioning of the first four beamlines (a quad) of NIF.

SPIE Journal Paper | 1 December 2004

Laser performance operations model

Michael Shaw, Wade Williams, Ronald House, Christopher Haynam

OE, Vol. 43, Issue 12, (December 2004) https://doi.org/10.1117/12.10.1117/1.1815004

KEYWORDS: National Ignition Facility, Optical amplifiers, Laser systems engineering, Diagnostics, Performance modeling, Wave plates, Control systems, Pulsed laser operation, Data modeling, Computing systems

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SPIE Journal Paper | 1 December 2004

National Ignition Facility wavefront requirements and optical architecture

Mary Spaeth, Kenneth Manes, Clifford Widmayer, Wade Williams, Pamela Whitman, Mark Henesian, Irving Stowers, John Honig

OE, Vol. 43, Issue 12, (December 2004) https://doi.org/10.1117/12.10.1117/1.1815332

KEYWORDS: National Ignition Facility, Wavefronts, Optical amplifiers, Near field optics, Deformable mirrors, Fusion energy, Crystals, Mirrors, Spatial frequencies, Optical engineering

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Proceedings Article | 28 May 2004 Paper

The National Ignition Facility wavefront requirements and optical architecture

Mary Spaeth, Kenneth Manes, Clifford Widmayer, Wade Williams, Pamela Whitman, Mark Henesian, Irving Stowers, John Honig

Proceedings Volume 5341, (2004) https://doi.org/10.1117/12.538478

KEYWORDS: National Ignition Facility, Optical amplifiers, Near field optics, Wavefronts, Deformable mirrors, Spatial frequencies, Crystals, Fusion energy, Distortion, Mirrors

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Proceedings Article | 28 May 2004 Paper

Laser performance operations model (LPOM)

Michael Shaw, Wade Williams, Ronald House, Christopher Haynam

Proceedings Volume 5341, (2004) https://doi.org/10.1117/12.538474

KEYWORDS: National Ignition Facility, Optical amplifiers, Laser systems engineering, Diagnostics, Fusion energy, Control systems, Data modeling, Performance modeling, Wave plates, Computing systems

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Proceedings Article | 28 May 2004 Paper

Optical propagation modeling for the National Ignition Facility

Wade Williams, Jerome Auerbach, Mark Henesian, Kenneth Jancaitis, Kenneth Manes, Naresh Mehta, Charles Orth, Richard Sacks, Michael Shaw, Clifford Widmayer

Proceedings Volume 5341, (2004) https://doi.org/10.1117/12.538476

KEYWORDS: National Ignition Facility, Wavefronts, Optical amplifiers, Data modeling, Diffraction, Frequency conversion, Laser beam propagation, Metrology, Deformable mirrors, Sensors

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Proceedings Article | 28 May 2004 Paper

NIF final optics system: frequency conversion and beam conditioning

Paul Wegner, Jerome Auerbach, Thomas Biesiada, Sham Dixit, Janice Lawson, Joseph Menapace, Thomas Parham, David Swift, Pamela Whitman, Wade Williams

Proceedings Volume 5341, (2004) https://doi.org/10.1117/12.538481

KEYWORDS: Crystals, National Ignition Facility, Frequency conversion, Diagnostics, Polarization, Optical fiber cables, Speckle, Optical fabrication, Frequency converters, Laser crystals

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Proceedings Article | 22 January 2004 Paper

Preformance and operational modeling of the National Ignition Facility

Michael Shaw, Wade Williams, Kenneth Jancaitis, C. Clay Widmayer, Ronald House

Proceedings Volume 5178, (2004) https://doi.org/10.1117/12.508428

KEYWORDS: National Ignition Facility, Laser systems engineering, Optical amplifiers, Fusion energy, Diagnostics, Computing systems, Data modeling, Control systems, Beam shaping, Performance modeling

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Proceedings Article | 27 December 2001 Paper

Correlation of test data from some NIF small optical components

Robert Chow, Michael McBurney, William Eickelberg, Wade Williams, Michael Thomas

Proceedings Volume 4451, (2001) https://doi.org/10.1117/12.453637

KEYWORDS: Wavefronts, National Ignition Facility, Coating, Laser damage threshold, Laser induced damage, Optical filters, Laser systems engineering, Optical components, Interferometers, Laser optics

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Proceedings Article | 23 July 1999 Paper

Simulations of a phase corrector plate for the National Ignition Facility

Wade Williams

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354147

KEYWORDS: Adaptive optics, National Ignition Facility, Optical calibration, Near field optics, Optical simulations, Phase shift keying, Active optics, Californium, Mirrors, Optical alignment

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Proceedings Article | 23 July 1999 Paper

NIF optical specifications: the importance of the RMS gradient

Janice Lawson, Jerome Auerbach, R. Edward English, Mark Henesian, John Hunt, Richard Sacks, John Trenholme, Wade Williams, Milton Shoup, John Kelly, Christopher Cotton

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354145

KEYWORDS: National Ignition Facility, Wavefronts, Optics manufacturing, Adaptive optics, Near field optics, Optical testing, Spatial frequencies, Wavefront distortions, Linear filtering, Manufacturing

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Proceedings Article | 23 July 1999 Paper

Wavefront and divergence of the Beamlet prototype laser

Paul Wegner, Mark Henesian, J. Thaddeus Salmon, Lynn Seppala, Timothy Weiland, Wade Williams, Bruno Van Wonterghem

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354256

KEYWORDS: Wavefronts, Optical amplifiers, Adaptive optics, Sensors, Design for manufacturing, National Ignition Facility, Mirrors, Amplifiers, Diagnostics, Interferometers

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Proceedings Article | 23 July 1999 Paper

Overview of recent KDP damage experiments and implications for NIF tripler performance

Michael Runkel, Richard Jennings, Jim DeYoreo, Walter Sell, David Milam, Natalia Zaitseva, L. Carmen, Wade Williams

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354149

KEYWORDS: National Ignition Facility, Crystals, Annealing, Failure analysis, Laser damage threshold, Thermal effects, Laser crystals, Data modeling, Raster graphics, Laser optics

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Proceedings Article | 23 July 1999 Paper

Application of adaptive optics for controlling the NIF laser performance and spot size

Richard Sacks, Jerome Auerbach, Erlan Bliss, Mark Henesian, Janice Lawson, Kenneth Manes, P. Renard, J. Thaddeus Salmon, John Trenholme, Wade Williams, Scott Winters, Richard Zacharias

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354146

KEYWORDS: Wavefronts, National Ignition Facility, Actuators, Adaptive optics, Optical amplifiers, Mirrors, Sensors, Beam splitters, Cobalt, Beam shaping

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Proceedings Article | 7 April 1999 Paper

Predicting bulk damage in NIF triple harmonic generators

Michael Runkel, W. Williams, James De Yoreo

Proceedings Volume 3578, (1999) https://doi.org/10.1117/12.344456

KEYWORDS: National Ignition Facility, Failure analysis, Laser induced damage, Laser damage threshold, Crystals, Laser crystals, Laser optics, Data modeling, Reliability, Information operations

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Proceedings Article | 24 June 1998 Paper

Modeling characterization of the National Ignition Facility focal spot

Wade Williams, Jerome Auerbach, Mark Henesian, Janice Lawson, John Hunt, Richard Sacks, C. Clay Widmayer

Proceedings Volume 3264, (1998) https://doi.org/10.1117/12.311904

KEYWORDS: Adaptive optics, National Ignition Facility, Modulation, Frequency conversion, Near field optics, Near field, Nano opto mechanical systems, Turbulence, Spatial filters, Phase shift keying

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Proceedings Article | 8 December 1997 Paper

Propagation modeling in two transverse dimensions of the National Ignition Facility baseline performance

Richard Sacks, W. Williams, Mark Henesian, Charles Orth, Scott Haney, John Trenholme, Jerome Auerbach, Janice Lawson

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294341

KEYWORDS: National Ignition Facility, Performance modeling, Optimization (mathematics), Near field, Safety, Fusion energy, Databases, Modulation, Refractive index, Laser development

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Proceedings Article | 8 December 1997 Paper

UV beam transport

David Milam, Wade Williams, Mark Henesian

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294342

KEYWORDS: UV optics, Ultraviolet radiation, National Ignition Facility, Silica, Copper, Optics, Laser optics, Laser beam propagation, Glasses, Wavefronts

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Proceedings Article | 8 December 1997 Paper

Optimized NIF laser system based on ICF target requirements

Scott Haney, Wade Williams, Richard Sacks, Charles Orth, Jerome Auerbach, Janice Lawson, Mark Henesian, Kenneth Jancaitis, P. Renard, John Trenholme

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294343

KEYWORDS: National Ignition Facility, Data modeling, Optimization (mathematics), Optical amplifiers, Switches, Amplifiers, Frequency conversion, Parallel processing, Data conversion, Thermography

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The design of the National Ignition Facility (NIF) is the result of optimization studies that maximized laser performance and reliability within a restricted cost budget. We modeled the laser using a suite of tools that included a 1D propagation code, a frequency conversion code, a 2D ray trace code for calculating the gain profile, thermo- mechanical codes for calculating the pump-induced distortions in the slabs, a database giving estimates of optics bulk/finish quality, and costing models of the laser/building. By exploiting parallel processing, we were able to consider approximately 750 possible designs per hour using a cluster of 28 workstations. For our optimization studies, we used a temporally shaped (ICF indirect drive) pulse producing at least 2.2 MJ and 600 TW in a 600 micron diameter hole at the target entrance plane. We varied as many as 20 design variables (e.g., slab counts, slab thickness, Nd concentration, amplifier pulse length) and applied as many as 40 constants (e.g., flashlamp voltage and fluence damage/filamentation at various points in the chain). We did not vary the number of beamlets (fixed at 192 or the aperture (fixed at 40 cm). We used three different optimization approaches: a variable metric algorithm, an exhaustive grid search of more than 50,000 candidate designs, and a parabolic interpolation scheme. All three approaches gave similar results. Moreover, a graphical analysis of the parameter scan data (analogous to sorting and pruning designs using a spreadsheet) has allowed us to understand why the optimizers eliminated alternate designs. The most inexpensive main-switch-boot slab configuration meeting the mission requirements and satisfying all constraints was 9-5-3. The cost of this configuration is approximately $DOL10M less than the 9-5-5 conceptual design. However, the NIF Project has chosen a slightly more expensive 11-0-7 configuration for continued Title I engineering because of its similarity to the Beamlet 11-0-5 design and a lower B-integral.

Proceedings Article | 8 December 1997 Paper

Effect of amplifier gain, loss, and gain profile on system performance

C. Clay Widmayer, Alvin Erlandson, Charles Orth, Scott Haney, Richard Sacks, Mark Henesian, Janice Lawson, Mark Rotter, David Speck, John Trenholme, Bruno Van Wonterghem, Kenneth Jancaitis, Wade Williams

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294340

KEYWORDS: Optical amplifiers, National Ignition Facility, Electronic filtering, Diamond, Laser energy, Performance modeling, Signal attenuation, Diffraction, Vignetting, Lithium

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Proceedings Article | 8 December 1997 Paper

Use of beam propagation modeling of Beamlet and Nova to ensure a "safe" National Ignition Facility laser system design

Mark Henesian, P. Renard, Jerome Auerbach, John Caird, B. Ehrlich, Steven Haney, John Hunt, Janice Lawson, Kenneth Manes, David Milam, Richard Sacks, Lynn Seppala, I. Smith, David Speck, Calvin Thompson, Bruno Van Wonterghem, Paul Wegner, Timothy Weiland, C. Clay Widmayer, Wade Williams, John Trenholme

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294244

KEYWORDS: Optical amplifiers, Spatial filters, Optical simulations, National Ignition Facility, Modulation, Near field, Optical filters, Laser beam propagation, Electronic filtering, Amplifiers

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Proceedings Article | 8 December 1997 Paper

Characterization of the one-micron beam profile at the interface between the one-micron laser and the UV generation and transport subsystem

P. Renard, C. Clay Widmayer, Jerome Auerbach, Scott Haney, Mark Henesian, John Hunt, Janice Lawson, Kenneth Manes, David Milam, Charles Orth, Richard Sacks, David Speck, John Trenholme, Wade Williams

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294259

KEYWORDS: National Ignition Facility, Ultraviolet radiation, Chlorine, Spatial filters, Interfaces, Near field, Mathematical modeling, Optical filters, Image filtering, Optical components

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Proceedings Article | 13 May 1997 Paper

Modeling of filamentation damage induced in silica by 351-nm laser pulses

David Milam, John Hunt, Kenneth Manes, Wade Williams

Proceedings Volume 2966, (1997) https://doi.org/10.1117/12.274283

KEYWORDS: Silica, Cameras, Charge-coupled devices, Beam splitters, Wave propagation, Beam propagation method, Spatial filters, Optical filters, Image filtering, Diagnostics

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Proceedings Article | 8 December 1995 Paper

Performance modeling of Beamlet

Jerome Auerbach, Janice Lawson, Mark Rotter, Richard Sacks, Bruno Van Wonterghem, Wade Williams

Proceedings Volume 2633, (1995) https://doi.org/10.1117/12.228305

KEYWORDS: Optical amplifiers, Optical components, Performance modeling, Optical testing, Phase shift keying, Diamond, Frequency converters, Spatial filters, Optical simulations, Systems modeling

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Showing 5 of 29 publications

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