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621 results on '"Bradley, D. K."'

1. The impact of low-mode symmetry on inertial fusion energy output in the burning plasma state

Author

Ralph, J. E., Ross, J. S., Zylstra, A. B., Kritcher, A. L., Robey, H. F., Young, C. V., Hurricane, O. A., Pak, A., Callahan, D. A., Baker, K. L., Casey, D. T., Döppner, T., Divol, L., Hohenberger, M., Pape, S. Le, Patel, P. K., Tommasini, R., Ali, S. J., Amendt, P. A., Atherton, L. J., Bachmann, B., Bailey, D., Benedetti, L. R., Berzak Hopkins, L., Betti, R., Bhandarkar, S. D., Biener, J., Bionta, R. M., Birge, N. W., Bond, E. J., Bradley, D. K., Braun, T., Briggs, T. M., Bruhn, M. W., Celliers, P. M., Chang, B., Chapman, T., Chen, H., Choate, C., Christopherson, A. R., Clark, D. S., Crippen, J. W., Dewald, E. L., Dittrich, T. R., Edwards, M. J., Farmer, W. A., Field, J. E., Fittinghoff, D., Frenje, J., Gaffney, J., Gatu Johnson, M., Glenzer, S. H., Grim, G. P., Haan, S., Hahn, K. D., Hall, G. N., Hammel, B. A., Harte, J., Hartouni, E., Heebner, J. E., Hernandez, V. J., Herrmann, H. W., Herrmann, M. C., Hinkel, D. E., Ho, D. D., Holder, J. P., Hsing, W. W., Huang, H., Humbird, K. D., Izumi, N., Jarrott, L. C., Jeet, J., Jones, O., Kerbel, G. D., Kerr, S. M., Khan, S. F., Kilkenny, J., Kim, Y., Geppert-Kleinrath, H., Geppert-Kleinrath, V., Kong, C., Koning, J. M., Kroll, J. J., Kruse, M. K. G., Kustowski, B., Landen, O. L., Langer, S., Larson, D., Lemos, N. C., Lindl, J. D., Ma, T., MacDonald, M. J., MacGowan, B. J., Mackinnon, A. J., MacLaren, S. A., MacPhee, A. G., Marinak, M. M., Mariscal, D. A., Marley, E. V., Masse, L., Meaney, K. D., Meezan, N. B., Michel, P. A., Millot, M., Milovich, J. L., Moody, J. D., Moore, A. S., Morton, J. W., Murphy, T. J., Newman, K., Di Nicola, J.-M. G., Nikroo, A., Nora, R., Patel, M. V., Pelz, L. J., Peterson, J. L., Ping, Y., Pollock, B. B., Ratledge, M., Rice, N. G., Rinderknecht, H. G., Rosen, M., Rubery, M. S., Salmonson, J. D., Sater, J., Schiaffino, S., Schlossberg, D. J., Schneider, M. B., Schroeder, C. R., Scott, H. A., Sepke, S. M., Sequoia, K., Sherlock, M. W., Shin, S., Smalyuk, V. A., Spears, B. K., Springer, P. T., Stadermann, M., Stoupin, S., Strozzi, D. J., Suter, L. J., Thomas, C. A., Town, R. P. J., Trosseille, C., Tubman, E. R., Volegov, P. L., Weber, C. R., Widmann, K., Wild, C., Wilde, C. H., Van Wonterghem, B. M., Woods, D. T., Woodworth, B. N., Yamaguchi, M., Yang, S. T., and Zimmerman, G. B.

Published
2024
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2. Experiments conducted in the burning plasma regime with inertial fusion implosions

Author

Ross, J. S., Ralph, J. E., Zylstra, A. B., Kritcher, A. L., Robey, H. F., Young, C. V., Hurricane, O. A., Callahan, D. A., Baker, K. L., Casey, D. T., Doeppner, T., Divol, L., Hohenberger, M., Pape, S. Le, Pak, A., Patel, P. K., Tommasini, R., Ali, S. J., Amendt, P. A., Atherton, L. J., Bachmann, B., Bailey, D., Benedetti, L. R., Hopkins, L. Berzak, Betti, R., Bhandarkar, S. D., Bionta, R. M., Birge, N. W., Bond, E. J., Bradley, D. K., Braun, T., Briggs, T. M., Bruhn, M. W., Celliers, P. M., Chang, B., Chapman, T., Chen, H., Choate, C., Christopherson, A. R., Clark, D. S., Crippen, J. W., Dewald, E. L., Dittrich, T. R., Edwards, M. J., Farmer, W. A., Field, J. E., Fittinghoff, D., Frenje, J., Gaffney, J., Johnson, M. Gatu, Glenzer, S. H., Grim, G. P., Haan, S., Hahn, K. D., Hall, G. N., Hammel, B. A., Harte, J., Hartouni, E., Heebner, J. E., Hernandez, V. J., Herrmann, H., Herrmann, M. C., Hinkel, D. E., Ho, D. D., Holder, J. P., Hsing, W. W., Huang, H., Humbird, K. D., Izumi, N., Jarrott, L. C., Jeet, J., Jones, O., Kerbel, G. D., Kerr, S. M., Khan, S. F., Kilkenny, J., Kim, Y., Kleinrath, H. Geppert, Kleinrath, V. Geppert, Kong, C., Koning, J. M., Kroll, J. J., Landen, O. L., Langer, S., Larson, D., Lemos, N. C., Lindl, J. D., Ma, T., MacDonald, M. J., MacGowan, B. J., Mackinnon, A. J., MacLaren, S. A., MacPhee, A. G., Marinak, M. M., Mariscal, D. A., Marley, E. V., Masse, L., Meaney, K., Meezan, N. B., Michel, P. A., Millot, M., Milovich, J. L., Moody, J. D., Moore, A. S., Morton, J. W., Murphy, T., Newman, K., Di Nicola, J. -M. G., Nikroo, A., Nora, R., Patel, M. V., Pelz, L. J., Peterson, J. L., Ping, Y., Pollock, B. B., Ratledge, M., Rice, N. G., Rinderknecht, H., Rosen, M., Rubery, M. S., Salmonson, J. D., Sater, J., Schiaffino, S., Schlossberg, D. J., Schneider, M. B., Schroeder, C. R., Scott, H. A., Sepke, S. M., Sequoia, K., Sherlock, M. W., Shin, S., Smalyuk, V. A., Spears, B. K., Springer, P. T., Stadermann, M., Stoupin, S., Strozzi, D. J., Suter, L. J., Thomas, C. A., Town, R. P. J., Tubman, E. R., Volegov, P. L., Weber, C. R., Widmann, K., Wild, C., Wilde, C. H., Van Wonterghem, B. M., Woods, D. T., Woodworth, B. N., Yamaguchi, M., Yang, S. T., and Zimmerman, G. B.

Subjects
Physics - Plasma Physics, High Energy Physics - Experiment
Abstract

An experimental program is currently underway at the National Ignition Facility (NIF) to compress deuterium and tritium (DT) fuel to densities and temperatures sufficient to achieve fusion and energy gain. The primary approach being investigated is indirect drive inertial confinement fusion (ICF), where a high-Z radiation cavity (a hohlraum) is heated by lasers, converting the incident energy into x-ray radiation which in turn drives the DT fuel filled capsule causing it to implode. Previous experiments reported DT fuel gain exceeding unity [O.A. Hurricane et al., Nature 506, 343 (2014)] and then exceeding the kinetic energy of the imploding fuel [S. Le Pape et al., Phys. Rev. Lett. 120, 245003 (2018)]. We report on recent experiments that have achieved record fusion neutron yields on NIF, greater than 100 kJ with momentary fusion powers exceeding 1PW, and have for the first time entered the burning plasma regime where fusion alpha-heating of the fuel exceeds the energy delivered to the fuel via compression. This was accomplished by increasing the size of the high-density carbon (HDC) capsule, increasing energy coupling, while controlling symmetry and implosion design parameters. Two tactics were successful in controlling the radiation flux symmetry and therefore the implosion symmetry: transferring energy between laser cones via plasma waves, and changing the shape of the hohlraum. In conducting these experiments, we controlled for known sources of degradation. Herein we show how these experiments were performed to produce record performance, and demonstrate the data fidelity leading us to conclude that these shots have entered the burning plasma regime.

Published
2021

3. Design of inertial fusion implosions reaching the burning plasma regime

Author

Kritcher, A. L., Young, C. V., Robey, H. F., Weber, C. R., Zylstra, A. B., Hurricane, O. A., Callahan, D. A., Ralph, J. E., Ross, J. S., Baker, K. L., Casey, D. T., Clark, D. S., Döppner, T., Divol, L., Hohenberger, M., Hopkins, L. Berzak, Le Pape, S., Meezan, N. B., Pak, A., Patel, P. K., Tommasini, R., Ali, S. J., Amendt, P. A., Atherton, L. J., Bachmann, B., Bailey, D., Benedetti, L. R., Betti, R., Bhandarkar, S. D., Biener, J., Bionta, R. M., Birge, N. W., Bond, E. J., Bradley, D. K., Braun, T., Briggs, T. M., Bruhn, M. W., Celliers, P. M., Chang, B., Chapman, T., Chen, H., Choate, C., Christopherson, A. R., Crippen, J. W., Dewald, E. L., Dittrich, T. R., Edwards, M. J., Farmer, W. A., Field, J. E., Fittinghoff, D., Frenje, J. A., Gaffney, J. A., Johnson, M. Gatu, Glenzer, S. H., Grim, G. P., Haan, S., Hahn, K. D., Hall, G. N., Hammel, B. A., Harte, J., Hartouni, E., Heebner, J. E., Hernandez, V. J., Herrmann, H., Herrmann, M. C., Hinkel, D. E., Ho, D. D., Holder, J. P., Hsing, W. W., Huang, H., Humbird, K. D., Izumi, N., Jarrott, L. C., Jeet, J., Jones, O., Kerbel, G. D., Kerr, S. M., Khan, S. F., Kilkenny, J., Kim, Y., Geppert-Kleinrath, H., Geppert-Kleinrath, V., Kong, C., Koning, J. M., Kruse, M. K. G., Kroll, J. J., Kustowski, B., Landen, O. L., Langer, S., Larson, D., Lemos, N. C., Lindl, J. D., Ma, T., MacDonald, M. J., MacGowan, B. J., Mackinnon, A. J., MacLaren, S. A., MacPhee, A. G., Marinak, M. M., Mariscal, D. A., Marley, E. V., Masse, L., Meaney, K., Michel, P. A., Millot, M., Milovich, J. L., Moody, J. D., Moore, A. S., Morton, J. W., Murphy, T., Newman, K., Di Nicola, J.-M. G., Nikroo, A., Nora, R., Patel, M. V., Pelz, L. J., Peterson, J. L., Ping, Y., Pollock, B. B., Ratledge, M., Rice, N. G., Rinderknecht, H., Rosen, M., Rubery, M. S., Salmonson, J. D., Sater, J., Schiaffino, S., Schlossberg, D. J., Schneider, M. B., Schroeder, C. R., Scott, H. A., Sepke, S. M., Sequoia, K., Sherlock, M. W., Shin, S., Smalyuk, V. A., Spears, B. K., Springer, P. T., Stadermann, M., Stoupin, S., Strozzi, D. J., Suter, L. J., Thomas, C. A., Town, R. P. J., Trosseille, C., Tubman, E. R., Volegov, P. L., Widmann, K., Wild, C., Wilde, C. H., Van Wonterghem, B. M., Woods, D. T., Woodworth, B. N., Yamaguchi, M., Yang, S. T., and Zimmerman, G. B.

Published
2022
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4. Identifying, quantifying, and mitigating background with the time-resolved x-ray diffraction platform at the National Ignition Facility.

Author

Benedetti, L. R., Palmer, N. E., Vennari, C. E., Nyholm, P. R., Eggert, J. H., Carpenter, A. C., Bhandarkar, N., Bradley, D. K., MacKinnon, A. J., Nagel, S. R., Ping, Y., Stan, C. V., and Trosseille, C.

Subjects
X-rays, HOT carriers, X-ray fluorescence, X-ray diffraction, DETECTORS, ELECTROMAGNETIC pulses
Abstract

The time-resolved x-ray diffraction platform at the National Ignition Facility (NIF) fields electronic sensors closer to the exploding laser-driven target than any other NIF diagnostic in order to directly detect diffracted x rays from highly compressed materials. We document strategies to characterize and mitigate the unacceptably high background signals observed in this geometry. We specifically assess the possible effects of electromagnetic pulse, x-ray fluorescence, hot electrons, and sensor-specific non-x-ray artifacts. Significant background reduction is achieved by strategic shielding. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Measurements of K-edge and L-edge extended x-ray absorption fine structure at the national ignition facility (invited).

Author

Sio, H., Krygier, A., Stoupin, S., Rudd, R. E., Bonev, S. A., Braun, D. G., Coppari, F., Coleman, A. L., Bhandarkar, N., Bitter, M., Bradley, D. K., Buscho, J., Corbin, J., Dozieres, M., Efthimion, P. C., Eggert, J. H., Gao, L., Hill, K. W., Hamel, S., and Hsing, W.

Subjects
EXTENDED X-ray absorption fine structure, X-ray absorption, GEOPHYSICS, PLANETARY science, COPPER
Abstract

High-energy-density laser facilities and advances in dynamic compression techniques have expanded access to material states in the Terapascal regime relevant to inertial confinement fusion, planetary science, and geophysics. However, experimentally determining the material temperature in these extreme conditions has remained a difficult challenge. Extended X-ray Absorption Fine Structure (EXAFS), referring to the modulations in x-ray absorption above an absorption edge from photoelectrons' interactions with neighboring atoms, has proven to be a versatile and robust technique for probing material temperature and density for mid-to-high Z elements under dynamic compression. The current platform at the National Ignition Facility has developed six configurations for EXAFS measurements between 7 and 18 keV for different absorption edges (Fe K, Co K, Cu K, Ta L3, Pb L3, and Zr K) using a curved-crystal spectrometer and a bright, continuum foil x-ray source. In this work, we describe the platform geometry, x-ray source performance, spectrometer resolution and throughput, design considerations, and data in ambient and dynamic-compression conditions. [ABSTRACT FROM AUTHOR]

Published
2024
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6. Developing time-resolved x-ray diffraction diagnostics at the National Ignition Facility (invited).

Author

Palmer, N. E., Benedetti, L. R., Vennari, C. E., Nyholm, P. R., Petre, R. B., Bhandarkar, N., Carpenter, A. C., Nagel, S. R., Eggert, J. H., Bradley, D. K., Mackinnon, A. J., and Ping, Y.

Subjects
ELECTROMAGNETIC pulses, PHASE transitions, X-ray diffraction measurement, DIAGNOSTIC imaging, X-ray diffraction
Abstract

As part of a program to measure phase transition timescales in materials under dynamic compression, we have designed new x-ray imaging diagnostics to record multiple x-ray diffraction measurements during a single laser-driven experiment. Our design places several ns-gated hybrid CMOS (hCMOS) sensors within a few cm of a laser-driven target. The sensors must be protected from an extremely harsh environment, including debris, electromagnetic pulses, and unconverted laser light. Another key challenge is reducing the x-ray background relative to the faint diffraction signal. Building on the success of our predecessor (Target Diffraction In Situ), we implemented a staged approach to platform development. First, we built a demonstration diagnostic (Gated Diffraction Development Diagnostic) with two hCMOS sensors to confirm we could adequately protect them from the harsh environment and also acquire acceptable diffraction data. This allowed the team to quickly assess the risks and address the most significant challenges. We also collected scientifically useful data during development. Leveraging what we learned, we recently developed a much more ambitious instrument (Flexible Imaging Diffraction Diagnostic for Laser Experiments) that can field up to eight hCMOS sensors in a flexible geometry and participate in back-to-back shots at the National Ignition Facility (NIF). The design also allows for future iterations, such as faster hCMOS sensors and an embedded x-ray streak camera. The enhanced capabilities of the new instrument required a much more complex design, and the unexpected issues encountered on the first few shots at NIF remind us that complexity has consequences. Our progress in addressing these challenges is described herein, as is our current focus on improving data quality by reducing x-ray background and quantifying the uncertainties of our diffraction measurements. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Time resolved x-ray diffraction using the flexible imaging diffraction diagnostic for laser experiments (FIDDLE) at the National Ignition Facility (NIF): Preliminary assessment of diffraction precision.

Author

Vennari, C. E., Palmer, N. E., Nyholm, P. R., Bhandakar, N. S., Nagel, S. R., Petre, R. B., Stan, C. V., Eggert, J. H., Bradley, D. K., Ping, Y., Thomas, A., Swift, D. C., Carpenter, A. C., MacKinnon, A. J., and Benedetti, L. R.

Subjects
FACE centered cubic structure, TIME pressure, DIAGNOSTIC imaging, X-ray diffraction, VIOLIN
Abstract

The Flexible Imaging Diffraction Diagnostic for Laser Experiments (FIDDLE) is a new diagnostic at the National Ignition Facility (NIF) designed to observe in situ solid–solid phase changes at high pressures using time resolved x-ray diffraction. FIDDLE currently incorporates five Icarus ultrafast x-ray imager sensors that take 2 ns snapshots and can be tuned to collect X-rays for tens of ns. The platform utilizes the laser power at NIF for both the laser drive and the generation of 10 keV X-rays for ∼10 ns using a Ge backlighter foil. We aim to use FIDDLE to observe diffraction at different times during compression to probe the kinetics of phase changes. Pb undergoes two solid–solid phase transitions during ramp compression: from face centered cubic (FCC) to hexagonal close packed (HCP) and HCP to body centered cubic (BCC). Results will be reported on some of the first shots using the FIDDLE diagnostic at NIF on ramp compressed Pb to a peak pressure of ∼110 GPa and a single undriven CeO2 calibration shot. A discussion of the uncertainties in the observed diffraction is included. [ABSTRACT FROM AUTHOR]

Published
2024
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8. Burning plasma achieved in inertial fusion

Author

Zylstra, A. B., Hurricane, O. A., Callahan, D. A., Kritcher, A. L., Ralph, J. E., Robey, H. F., Ross, J. S., Young, C. V., Baker, K. L., Casey, D. T., Döppner, T., Divol, L., Hohenberger, M., Le Pape, S., Pak, A., Patel, P. K., Tommasini, R., Ali, S. J., Amendt, P. A., Atherton, L. J., Bachmann, B., Bailey, D., Benedetti, L. R., Berzak Hopkins, L., Betti, R., Bhandarkar, S. D., Biener, J., Bionta, R. M., Birge, N. W., Bond, E. J., Bradley, D. K., Braun, T., Briggs, T. M., Bruhn, M. W., Celliers, P. M., Chang, B., Chapman, T., Chen, H., Choate, C., Christopherson, A. R., Clark, D. S., Crippen, J. W., Dewald, E. L., Dittrich, T. R., Edwards, M. J., Farmer, W. A., Field, J. E., Fittinghoff, D., Frenje, J., Gaffney, J., Gatu Johnson, M., Glenzer, S. H., Grim, G. P., Haan, S., Hahn, K. D., Hall, G. N., Hammel, B. A., Harte, J., Hartouni, E., Heebner, J. E., Hernandez, V. J., Herrmann, H., Herrmann, M. C., Hinkel, D. E., Ho, D. D., Holder, J. P., Hsing, W. W., Huang, H., Humbird, K. D., Izumi, N., Jarrott, L. C., Jeet, J., Jones, O., Kerbel, G. D., Kerr, S. M., Khan, S. F., Kilkenny, J., Kim, Y., Geppert Kleinrath, H., Geppert Kleinrath, V., Kong, C., Koning, J. M., Kroll, J. J., Kruse, M. K. G., Kustowski, B., Landen, O. L., Langer, S., Larson, D., Lemos, N. C., Lindl, J. D., Ma, T., MacDonald, M. J., MacGowan, B. J., Mackinnon, A. J., MacLaren, S. A., MacPhee, A. G., Marinak, M. M., Mariscal, D. A., Marley, E. V., Masse, L., Meaney, K., Meezan, N. B., Michel, P. A., Millot, M., Milovich, J. L., Moody, J. D., Moore, A. S., Morton, J. W., Murphy, T., Newman, K., Di Nicola, J.-M. G., Nikroo, A., Nora, R., Patel, M. V., Pelz, L. J., Peterson, J. L., Ping, Y., Pollock, B. B., Ratledge, M., Rice, N. G., Rinderknecht, H., Rosen, M., Rubery, M. S., Salmonson, J. D., Sater, J., Schiaffino, S., Schlossberg, D. J., Schneider, M. B., Schroeder, C. R., Scott, H. A., Sepke, S. M., Sequoia, K., Sherlock, M. W., Shin, S., Smalyuk, V. A., Spears, B. K., Springer, P. T., Stadermann, M., Stoupin, S., Strozzi, D. J., Suter, L. J., Thomas, C. A., Town, R. P. J., Tubman, E. R., Trosseille, C., Volegov, P. L., Weber, C. R., Widmann, K., Wild, C., Wilde, C. H., Van Wonterghem, B. M., Woods, D. T., Woodworth, B. N., Yamaguchi, M., Yang, S. T., and Zimmerman, G. B.

Published
2022
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9. The crucial role of diagnostics in achieving ignition on the National Ignition Facility (NIF).

Author

Kilkenny, J. D., Pak, A., Landen, O. L., Moore, A. S., Meezan, N. B., Haan, S. W., Hsing, W. W., Batha, S. H., Bradley, D. K., Gatu-Johnson, M., Mackinnon, A. J., Regan, S. P., and Smalyuk, V. A.

Subjects
TREND analysis, SCIENTIFIC discoveries, FALSIFICATION, LASERS, LOGIC
Abstract

Well over 100 diagnostics can operate on the National Ignition Facility (NIF) as a result of several decades of development on NIF, and before that on Nova, OMEGA, and earlier LLNL lasers. A subset of these have guided the approach to achieving ignition on the NIF in 2022 [H. Abu-Shawareb et al. (Indirect Drive ICF Collaboration), Phys. Rev. Lett. 129(7), 075001 (2022)]. Achieving ignition on NIF has required many types of experiments with this core set of diagnostics, some constraining known unknowns and some revealing surprises—arguably unknown unknowns. Early design work realized that the extreme precision required for ignition on NIF would require fine-tuning by experiment, that is, measuring and adjusting known unknowns. Many examples are given where the use of the core set of ignition diagnostics in experimental arrangements called platforms demonstrated control of the key theoretical parameters defined as shape, adiabat, velocity, and mix. The direction of the adjustments to input conditions is found either by trend analysis or, in many cases, by observing from the diagnostic data the direction to make an adjustment. In addition, diagnostics have revealed some unexpected or neglected known issues, which degrade performance, or unexpected issues, unknown unknowns. Some of these factors had been previously considered, but underestimated or difficult to calculate at the time. The overall methodology can be described as a variant of Popper's falsifiability philosophy [K. Popper, The Logic of Scientific Discovery (Hutchinson, 1974)]. This paper summarizes the role of ignition diagnostics in terms of falsification or validation of theory or experimental setup as well as uncovering unexpected issues. The journey to ignition started in the seventies with a 1-µm wavelength laser producing disastrous results. Diagnostics have guided us to the recent multi-decadal goal of demonstrating ignition and burn in the laboratory. [ABSTRACT FROM AUTHOR]

Published
2024
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10. Electrical design of the flexible imaging diffraction diagnostic for laser experiments (FIDDLE) at the National Ignition Facility (NIF)—Requirements, design, and performance.

Author

Nyholm, P. R., Palmer, N. E., Petre, R. B., Carpenter, A. C., Nagel, S. R., Bradley, D. K., Vennari, C. E., Golick, B., Boyle, D., Sharp, A. M., Morioka, S. B., Mackinnon, A. J., and Benedetti, L. R.

Abstract

The Flexible Imaging Diffraction Diagnostic for Laser Experiments (FIDDLE) is a newly developed diagnostic for imaging time resolved diffraction in experiments at the National Ignition Facility (NIF). It builds on the successes of its predecessor, the Gated Diffraction Development Diagnostic (G3D). The FIDDLE was designed to support eight Daedalus version 2 sensors (six more hCMOS sensors than any other hCMOS-based diagnostic in NIF to date) and an integrated streak camera. We will review the electrical requirements, design, and performance of the electrical subsystems that were created to support this large number of cameras in the FIDDLE. The analysis of the data that the FIDDLE is intended to collect relies heavily on the accurate and well-understood timing of each sensor. We report camera-to-camera timing jitter of less than 100 ps rms and sensor integration times of 2.2 ns FWHM in 2-2 timing mode. Additionally, diffraction experiments on the NIF produce electric fields (EMI) on the order of 1 kV/m, which have been observed to negatively impact the performance of some electrical components of the FIDDLE. We report on the results of testing hCMOS camera electronics in a similar EMI environment generated in an offline lab. We also summarize the use of a novel approach to using a vector network analyzer as an EMI leak detector to understand and reduce the negative impacts of EMI on the FIDDLE. [ABSTRACT FROM AUTHOR]

Published
2024
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11. Measurement of mix at the fuel–ablator interface in indirectly driven capsule implosions on the National Ignition Facility

Author

Hall, G. N., primary, Weber, C. R., additional, Smalyuk, V. A., additional, Landen, O. L., additional, Trosseille, C., additional, Pak, A., additional, Hartouni, E., additional, Marley, E., additional, Ebert, T., additional, Bradley, D. K., additional, Hsing, W., additional, Tommasini, R., additional, Izumi, N., additional, Pape, S. Le, additional, Divol, L., additional, Krauland, C. M., additional, Thompson, N., additional, Casco, E. R., additional, Ayers, M. J., additional, Nagel, S. R., additional, Carpenter, A. C., additional, Hurd, E. R., additional, Dayton, M. S., additional, Engelhorn, K., additional, and Holder, J. P., additional

Published
2024
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12. Time-resolved X-ray diffraction diagnostic development for the National Ignition Facility

Author

Werellapatha, K., primary, Palmer, N. E., additional, Gorman, M. G., additional, Bernier, J. V., additional, Bhandarkar, N. S., additional, Bradley, D. K., additional, Braun, D. G., additional, Bruhn, M., additional, Carpenter, A., additional, Celliers, P. M., additional, Coppari, F., additional, Dayton, M., additional, Durand, C., additional, Eggert, J. H., additional, Ferguson, B., additional, Heidl, B., additional, Heinbockel, C., additional, Heredia, R., additional, Huckins, J., additional, Hurd, E., additional, Hsing, W., additional, Krauland, C. M., additional, Lazicki, A. E., additional, Kalantar, D., additional, Kehl, J., additional, Killebrew, K., additional, Masters, N., additional, Millot, M., additional, Nagel, S. R., additional, Petre, R. B., additional, Ping, Y., additional, Polsin, D. N., additional, Singh, S., additional, Stan, C. V., additional, Swift, D., additional, Tabimina, J., additional, Thomas, A., additional, Zobrist, T., additional, and Benedetti, L. R., additional

Published
2024
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13. Numerical Modeling of the Sensitivity of X-Ray Driven Implosions to Low-Mode Flux Asymmetries

Author

Scott, R. H. H., Clark, D. S., Bradley, D. K., Callahan, D. A., Edwards, M. J., Haan, S. W., Jones, O. S., Spears, B. K., Marinak, M. M., Town, R. P. J., Norreys, P. A., and Suter, L. J.

Subjects
Physics - Plasma Physics
Abstract

The sensitivity of inertial confinement fusion implosions of the type performed on the National Ignition Facility (NIF) to low-mode flux asymmetries has been investigated numerically. It is shown that large-amplitude, low-order mode shapes (Legendre polynomial P4), resulting from associated low order flux asymmetries, cause spatial variations in capsule and fuel momentum that prevent the DT ice layer from being decelerated uniformly by the hot spot pressure. This reduces the transfer of kinetic to internal energy of the central hot spot, thus reducing neutron yield. Furthermore, synthetic gated x-ray images of the hot spot self-emission indicate that P4 shapes may be unquantifiable for DT layered capsules. Instead the positive P4 asymmetry aliases itself as an oblate P4 in the x-ray self emission images. Correction of this apparent P2 distortion can further distort the implosion while creating a round x-ray image. Long wavelength asymmetries may be playing a significant role in the observed yield reduction of NIF DT implosions relative to detailed post-shot 2D simulations., Comment: 5 pages, 4 figures, 1 table

Published
2012
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14. Extended X-ray absorption fine structure of dynamically-compressed copper up to 1 terapascal

Author

Sio, H., primary, Krygier, A., additional, Braun, D. G., additional, Rudd, R. E., additional, Bonev, S. A., additional, Coppari, F., additional, Millot, M., additional, Fratanduono, D. E., additional, Bhandarkar, N., additional, Bitter, M., additional, Bradley, D. K., additional, Efthimion, P. C., additional, Eggert, J. H., additional, Gao, L., additional, Hill, K. W., additional, Hood, R., additional, Hsing, W., additional, Izumi, N., additional, Kemp, G., additional, Kozioziemski, B., additional, Landen, O. L., additional, Le Galloudec, K., additional, Lockard, T. E., additional, Mackinnon, A., additional, McNaney, J. M., additional, Ose, N., additional, Park, H.-S., additional, Remington, B. A., additional, Schneider, M. B., additional, Stoupin, S., additional, Thorn, D. B., additional, Vonhof, S., additional, Wu, C. J., additional, and Ping, Y., additional

Published
2023
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15. Publisher Correction: Burning plasma achieved in inertial fusion

Author

Zylstra, A. B., Hurricane, O. A., Callahan, D. A., Kritcher, A. L., Ralph, J. E., Robey, H. F., Ross, J. S., Young, C. V., Baker, K. L., Casey, D. T., Döppner, T., Divol, L., Hohenberger, M., Le Pape, S., Pak, A., Patel, P. K., Tommasini, R., Ali, S. J., Amendt, P. A., Atherton, L. J., Bachmann, B., Bailey, D., Benedetti, L. R., Berzak Hopkins, L., Betti, R., Bhandarkar, S. D., Biener, J., Bionta, R. M., Birge, N. W., Bond, E. J., Bradley, D. K., Braun, T., Briggs, T. M., Bruhn, M. W., Celliers, P. M., Chang, B., Chapman, T., Chen, H., Choate, C., Christopherson, A. R., Clark, D. S., Crippen, J. W., Dewald, E. L., Dittrich, T. R., Edwards, M. J., Farmer, W. A., Field, J. E., Fittinghoff, D., Frenje, J., Gaffney, J., Gatu Johnson, M., Glenzer, S. H., Grim, G. P., Haan, S., Hahn, K. D., Hall, G. N., Hammel, B. A., Harte, J., Hartouni, E., Heebner, J. E., Hernandez, V. J., Herrmann, H., Herrmann, M. C., Hinkel, D. E., Ho, D. D., Holder, J. P., Hsing, W. W., Huang, H., Humbird, K. D., Izumi, N., Jarrott, L. C., Jeet, J., Jones, O., Kerbel, G. D., Kerr, S. M., Khan, S. F., Kilkenny, J., Kim, Y., Geppert Kleinrath, H., Geppert Kleinrath, V., Kong, C., Koning, J. M., Kroll, J. J., Kruse, M. K. G., Kustowski, B., Landen, O. L., Langer, S., Larson, D., Lemos, N. C., Lindl, J. D., Ma, T., MacDonald, M. J., MacGowan, B. J., Mackinnon, A. J., MacLaren, S. A., MacPhee, A. G., Marinak, M. M., Mariscal, D. A., Marley, E. V., Masse, L., Meaney, K., Meezan, N. B., Michel, P. A., Millot, M., Milovich, J. L., Moody, J. D., Moore, A. S., Morton, J. W., Murphy, T., Newman, K., Di Nicola, J.-M. G., Nikroo, A., Nora, R., Patel, M. V., Pelz, L. J., Peterson, J. L., Ping, Y., Pollock, B. B., Ratledge, M., Rice, N. G., Rinderknecht, H., Rosen, M., Rubery, M. S., Salmonson, J. D., Sater, J., Schiaffino, S., Schlossberg, D. J., Schneider, M. B., Schroeder, C. R., Scott, H. A., Sepke, S. M., Sequoia, K., Sherlock, M. W., Shin, S., Smalyuk, V. A., Spears, B. K., Springer, P. T., Stadermann, M., Stoupin, S., Strozzi, D. J., Suter, L. J., Thomas, C. A., Town, R. P. J., Tubman, E. R., Trosseille, C., Volegov, P. L., Weber, C. R., Widmann, K., Wild, C., Wilde, C. H., Van Wonterghem, B. M., Woods, D. T., Woodworth, B. N., Yamaguchi, M., Yang, S. T., and Zimmerman, G. B.

Published
2022
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16. National Diagnostic Working Group (NDWG) for inertial confinement fusion (ICF)/high-energy density (HED) science: The whole exceeds the sum of its parts

Author

Kilkenny, J. D., primary, Hsing, W. W., additional, Batha, S. H., additional, Rochau, G. A., additional, Sangster, T. C., additional, Bell, P. M., additional, Bradley, D. K., additional, Chen, H., additional, Frenje, J. A., additional, Gatu-Johnson, M., additional, Glebov, V. Yu., additional, Leeper, R. J., additional, Mackinnon, A. J., additional, Regan, S. P., additional, Ross, J. S., additional, and Weaver, J. l., additional

Published
2023
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17. Optimized x-ray emission from 10 ns long germanium x-ray sources at the National Ignition Facility

Author

Werellapatha, K., primary, Hall, G. N., additional, Krauland, C., additional, Krygier, A., additional, Bhandarkar, N., additional, Bradley, D. K., additional, Coppari, F., additional, Gorman, M. G., additional, Heinbockel, C., additional, Kemp, G. E., additional, Khan, S. F., additional, Lazicki, A., additional, Masters, N., additional, May, M. J., additional, Nagel, S. R., additional, Palmer, N. E., additional, Eggert, J. H., additional, and Benedetti, L. R., additional

Published
2022
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18. Yield degradation mechanisms for two-shock capsules evaluated through simulations

Author

Bradley, P. A., primary, Haines, B. M., additional, Kyrala, G. A., additional, MacLaren, S. A., additional, Salmonson, J. D., additional, Pino, J. E., additional, Mackay, K. K., additional, Peterson, R. R., additional, Yi, A., additional, Yin, L., additional, Olson, R. E., additional, Krasheninnikova, N., additional, Batha, S. H., additional, Kline, J. L., additional, Sauppe, J. P., additional, Finnegan, S. M., additional, Pak, A., additional, Ma, T., additional, Dittrich, T. R., additional, Dewald, E. L., additional, Khan, S. F., additional, Sayre, D., additional, Tommasini, R., additional, Ralph, J. E., additional, Field, J. E., additional, Masse, L., additional, Tipton, R. E., additional, Mackinnon, A. J., additional, Benedetti, L. R., additional, Nagel, S. R., additional, Bradley, D. K., additional, Celliers, P. M., additional, Berzak Hopkins, L., additional, Izumi, N., additional, Kervin, P., additional, Yeamans, C., additional, Hatarik, R., additional, Hartouni, E. P., additional, Turnbull, D. P., additional, Chen, K. C., additional, and Hoover, D. E., additional

Published
2022
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20. Symmetric Inertial Confinement Fusion Implosions at Ultra-High Laser Energies

Author

Glenzer, S. H., MacGowan, B. J., Michel, P., Meezan, N. B., Suter, L. J., Dixit, S. N., Kline, J. L., Kyrala, G. A., Bradley, D. K., Callahan, D. A., Dewald, E. L., Divol, L., Dzenitis, E., Edwards, M. J., Hamza, A. V., Haynam, C. A., Hinkel, D. E., Kalantar, D. H., Kilkenny, J. D., Landen, O. L., Lindl, J. D., LePape, S., Moody, J. D., Nikroo, A., Parham, T., Schneider, M. B., Town, R. P. J., Wegner, P., Widmann, K., Whitman, P., Young, B. K. F., Van Wonterghem, B., Atherton, L. J., and Moses, E. I.

Published
2010
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22. Long-Duration X-Ray Source Development for X-Ray Diffraction at The National Ignition Facility

Author

Werellapatha, K., primary, Hall, G. N., additional, Coppari, F., additional, Kemp, G. E., additional, Krygier, A., additional, Palmer, N. E., additional, Krauland, C., additional, Khan, S. F., additional, Lazicki, A., additional, Gorman, M. G., additional, Nagel, S. R., additional, Heinbockel, C., additional, Bhandarkar, N., additional, Masters, N., additional, Bradley, D. K., additional, Eggert, J.H., additional, and Benedetti, L. R., additional

Published
2021
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24. The first target experiments on the National Ignition Facility

Author

Landen, O. L., Glenzer, S. H., Froula, D. H., Dewald, E. L., Suter, L. J., Schneider, M. B., Hinkel, D. E., Fernandez, J. C., Kline, J. L., Goldman, S. R., Braun, D. G., Celliers, P. M., Moon, S. J., Robey, H. S., Lanier, N. E., Glendinning, S. G., Blue, B. E., Wilde, B. H., Jones, O. S., Schein, J., Divol, L., Kalantar, D. H., Campbell, K. M., Holder, J. P., McDonald, J. W., Niemann, C., Mackinnon, A. J., Collins, G. W., Bradley, D. K., Eggert, J. H., Hicks, D. G., Gregori, G., Kirkwood, R. K., Young, B. K., Foster, J. M., Hansen, J. F., Perry, T. S., Munro, D. H., Baldis, H. A., Grim, G. P., Heeter, R. F., Hegelich, M. B., Montgomery, D. S., Rochau, G. A., Olson, R. E., Turner, R. E., Workman, J. B., Berger, R. L., Cohen, B. I., Kruer, W. L., Langdon, A. B., Langer, S. H., Meezan, N. B., Rose, H. A., Still, C. H., Williams, E. A., Dodd, E. S., Edwards, M. J., Monteil, M.-C., Stevenson, R. M., Thomas, B. R., Coker, R. F., Magelssen, G. R., Rosen, P. A., Stry, P. E., Woods, D., Weber, S. V., Young, P. E., Alvarez, S., Armstrong, G., Bahr, R., Bourgade, J.-L., Bower, D., Celeste, J., Chrisp, M., Compton, S., Cox, J., Constantin, C., Costa, R., Duncan, J., Ellis, A., Emig, J., Gautier, C., Greenwood, A., Griffith, R., Holdner, F., Holtmeier, G., Hargrove, D., James, T., Kamperschroer, J., Kimbrough, J., Landon, M., Lee, F. D., Malone, R., May, M., Montelongo, S., Moody, J., Ng, E., Nikitin, A., Pellinen, D., Piston, K., Poole, M., Rekow, V., Rhodes, M., Shepherd, R., Shiromizu, S., Voloshin, D., Warrick, A., Watts, P., Weber, F., Young, P., Arnold, P., Atherton, L., Bardsley, G., Bonanno, R., Borger, T., Bowers, M., Bryant, R., Buckman, S., Burkhart, S., Cooper, F., Dixit, S. N., Erbert, G., Eder, D. C., Ehrlich, R. E., Felker, B., Fornes, J., Frieders, G., Gardner, S., Gates, C., Gonzalez, M., Grace, S., Hall, T., Haynam, C. A., Heestand, G., Henesian, M. A., Hermann, M., Hermes, G., Huber, S., Jancaitis, K., Johnson, S., Kauffman, B., Kelleher, T., Kohut, T., Koniges, A. E., Labiak, T., Latray, D., Lee, A., Lund, D., Mahavandi, S., Manes, K. R., Marshall, C., McBride, J., McCarville, T., McGrew, L., Menapace, J., Mertens, E., Murray, J., Neumann, J., Newton, M., Opsahl, P., Padilla, E., Parham, T., Parrish, G., Petty, C., Polk, M., Powell, C., Reinbachs, I., Rinnert, R., Riordan, B., Ross, G., Robert, V., Tobin, M., Sailors, S., Saunders, R., Schmitt, M., Shaw, M., Singh, M., Spaeth, M., Stephens, A., Tietbohl, G., Tuck, J., Van Wonterghem, B. M., Vidal, R., Wegner, P. J., Whitman, P., Williams, K., Winward, K., Work, K., Wallace, R., Nobile, A., Bono, M., Day, B., Elliott, J., Hatch, D., Louis, H., Manzenares, R., O'Brien, D., Papin, P., Pierce, T., Rivera, G., Ruppe, J., Sandoval, D., Schmidt, D., Valdez, L., Zapata, K., MacGowan, B. J., Eckart, M. J., Hsing, W. W., Springer, P. T., Hammel, B. A., Moses, E. I., and Miller, G. H.

Published
2007
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26. Time-Resolved Fuel Density Profiles of the Stagnation Phase of Indirect-Drive Inertial Confinement Implosions

Author

Tommasini, Riccardo, primary, Landen, O. L., additional, Berzak Hopkins, L., additional, Hatchett, S. P., additional, Kalantar, D. H., additional, Hsing, W. W., additional, Alessi, D. A., additional, Ayers, S. L., additional, Bhandarkar, S. D., additional, Bowers, M. W., additional, Bradley, D. K., additional, Conder, A. D., additional, Di Nicola, J. M., additional, Di Nicola, P., additional, Divol, L., additional, Fittinghoff, D., additional, Gururangan, G., additional, Hall, G. N., additional, Hamamoto, M., additional, Hargrove, D. R., additional, Hartouni, E. P., additional, Heebner, J. E., additional, Herriot, S. I., additional, Hermann, M. R., additional, Holder, J. P., additional, Holunga, D. M., additional, Homoelle, D., additional, Iglesias, C. A., additional, Izumi, N., additional, Kemp, A. J., additional, Kohut, T., additional, Kroll, J. J., additional, LaFortune, K., additional, Lawson, J. K., additional, Lowe-Webb, R., additional, MacKinnon, A. J., additional, Martinez, D., additional, Masters, N. D., additional, Mauldin, M. P., additional, Milovich, J., additional, Nikroo, A., additional, Okui, J. K., additional, Park, J., additional, Prantil, M., additional, Pelz, L. J., additional, Schoff, M., additional, Sigurdsson, R., additional, Volegov, P. L., additional, Vonhof, S., additional, Zobrist, T. L., additional, Wallace, R. J., additional, Walters, C. F., additional, Wegner, P., additional, Widmayer, C., additional, Williams, W. H., additional, Youngblood, K., additional, Edwards, M. J., additional, and Herrmann, M. C., additional

Published
2020
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27. Erratum: “Image-plate sensitivity to x rays at 2 to 60 keV” [Rev. Sci. Instrum. 90, 013506 (2019)]

Author

Rosenberg, M. J., primary, Thorn, D. B., additional, Izumi, N., additional, Williams, D., additional, Rowland, M., additional, Torres, G., additional, Haugh, M., additional, Hillyard, P., additional, Adelman, N., additional, Schuler, T., additional, Barrios, M. A., additional, Holder, J. P., additional, Schneider, M. B., additional, Fournier, K. B., additional, Bradley, D. K., additional, and Regan, S. P., additional

Published
2019
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28. Image-plate sensitivity to x rays at 2 to 60 keV

Author

Rosenberg, M. J., primary, Thorn, D. B., additional, Izumi, N., additional, Williams, D., additional, Rowland, M., additional, Torres, G., additional, Haugh, M., additional, Hillyard, P., additional, Adelman, N., additional, Schuler, T., additional, Barrios, M. A., additional, Holder, J. P., additional, Schneider, M. B., additional, Fournier, K. B., additional, Bradley, D. K., additional, and Regan, S. P., additional

Published
2019
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29. The Crystal Backlighter Imager: A spherically bent crystal imager for radiography on the National Ignition Facility

Author

Hall, G. N., primary, Krauland, C. M., additional, Schollmeier, M. S., additional, Kemp, G. E., additional, Buscho, J. G., additional, Hibbard, R., additional, Thompson, N., additional, Casco, E. R., additional, Ayers, M. J., additional, Ayers, S. L., additional, Meezan, N. B., additional, Hopkins, L. F. Berzak, additional, Nora, R., additional, Hammel, B. A., additional, Masse, L., additional, Field, J. E., additional, Bradley, D. K., additional, Bell, P., additional, Landen, O. L., additional, Kilkenny, J. D., additional, Mariscal, D., additional, Park, J., additional, McCarville, T. J., additional, Lowe-Webb, R., additional, Kalantar, D., additional, Kohut, T., additional, and Piston, K., additional

Published
2019
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30. Long duration x-ray source development for x-ray diffraction at the National Ignition Facility.

Author

Werellapatha, K., Hall, G. N., Coppari, F., Kemp, G. E., Palmer, N. E., Krauland, C., Khan, S. F., Lazicki, A., Gorman, M. G., Nagel, S. R., Heinbockel, C., Bhandarkar, N., Masters, N., Bradley, D. K., Eggert, J. H., and Benedetti, L. R.

Subjects
X-ray diffraction, X-rays, PHASE transitions, LASER pulses
Abstract

We present the results of experiments to produce a 10 ns-long, quasi-monochromatic x-ray source. This effort is needed to support time-resolved x-ray diffraction (XRDt) measurements of phase transitions during laser-driven dynamic compression experiments at the National Ignition Facility. To record XRDt of phase transitions as they occur, we use high-speed (∼1 ns) gated hybrid CMOS detectors, which record multiple frames of data over a timescale of a few to tens of ns. Consequently, to make effective use of these imagers, XRDt needs the x-ray source to be narrow in energy and uniform in time as long as the sensors are active. The x-ray source is produced by a laser irradiated Ge foil. Our results indicate that the x-ray source lasts during the whole duration of the main laser pulse. Both time-resolved and time-integrated spectral data indicate that the line emission is dominated by the He-α complex over higher energy emission lines. Time-integrated spectra agree well with a one-dimensional Cartesian simulation using HYDRA that predicts a conversion efficiency of 0.56% when the incident intensity is 2 × 1015 W/cm2 on a Ge backlighter. [ABSTRACT FROM AUTHOR]

Published
2021
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31. Using a 2-shock 1D platform at NIF to measure the effect of convergence on mix and symmetry

Author

Kyrala, G. A., primary, Pino, J. E., additional, Khan, S. F., additional, MacLaren, S. A., additional, Salmonson, J. D., additional, Ma, T., additional, Masse, L., additional, Tipton, R., additional, Bradley, P. A., additional, Rygg, J. R., additional, Field, J. E., additional, Tommasini, R., additional, Ralph, J. E., additional, Turnbull, D. P., additional, Mackinnon, A. J., additional, Benedetti, L. R., additional, Bradley, D. K., additional, Nagel, S., additional, Celliers, P. M., additional, Dewald, E., additional, Dittrich, T. R., additional, Berzak Hopkins, L., additional, Izumi, N., additional, Kervin, M. L., additional, Kline, J., additional, Yeamans, C., additional, Hatarik, R., additional, Sayre, D., additional, Hartouni, E. P., additional, Pak, A., additional, Chen, K. C., additional, and Hoover, D. E., additional

Published
2018
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32. An x-ray optic calibration facility for high energy density diagnostics

Author

Kozioziemski, B. J., primary, Ayers, J., additional, Bell, P., additional, Bradley, D. K., additional, Descalle, M.-A., additional, Hau-Riege, S., additional, McCarville, T. J., additional, Pardini, T., additional, Pickworth, L. A., additional, Vogel, J. K., additional, Stone, J., additional, Robinson, J., additional, Ampleford, D. J., additional, Ball, C. R., additional, Bourdon, C. J., additional, Fein, J. R., additional, Wu, M., additional, Ames, A., additional, Bruni, R., additional, and Romaine, S., additional

Published
2018
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33. The single-line-of-sight, time-resolved x-ray imager diagnostic on OMEGA

Author

Theobald, W., primary, Sorce, C., additional, Bedzyk, M., additional, Ivancic, S. T., additional, Marshall, F. J., additional, Stoeckl, C., additional, Shah, R. C., additional, Lawrie, M., additional, Regan, S. P., additional, Sangster, T. C., additional, Campbell, E. M., additional, Hilsabeck, T. J., additional, Englehorn, K., additional, Kilkenny, J. D., additional, Morris, D., additional, Chung, T. M., additional, Hares, J. D., additional, Dymoke-Bradshaw, A. K. L., additional, Bell, P., additional, Celeste, J., additional, Carpenter, A. C., additional, Dayton, M., additional, Bradley, D. K., additional, Jackson, M. C., additional, Pickworth, L., additional, Nagel, S. R., additional, Rochau, G., additional, Porter, J., additional, Sanchez, M., additional, Claus, L., additional, Robertson, G., additional, and Looker, Q., additional

Published
2018
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35. Simultaneous visualization of wall motion, beam propagation, and implosion symmetry on the National Ignition Facility (invited)

Author

Izumi, N., primary, Meezan, N. B., additional, Johnson, S., additional, Woodworth, B. N., additional, Woods, T., additional, Jones, O. S., additional, Landen, O. L., additional, Kroll, J. J., additional, Vonhof, S., additional, Nikroo, A., additional, Jaquez, J., additional, Kangas, K., additional, Bailey, C., additional, Hardy, M., additional, Ehrlich, R., additional, Ralph, J., additional, Town, R. Pj., additional, Bradley, D. K., additional, Hinkel, D. E., additional, Moore, A. S., additional, Divol, L., additional, Young, C., additional, and Moody, J. D., additional

Published
2018
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38. The dilation aided single–line–of–sight x–ray camera for the National Ignition Facility: Characterization and fielding

Author

Nagel, S. R., primary, Carpenter, A. C., additional, Park, J., additional, Dayton, M. S., additional, Bell, P. M., additional, Bradley, D. K., additional, Funsten, B. T., additional, Hatch, B. W., additional, Heerey, S., additional, Hill, J. M., additional, Holder, J. P., additional, Hurd, E. R., additional, Macaraeg, C. C., additional, Patel, P. B., additional, Petre, R. B., additional, Piston, K., additional, Trosseille, C. A., additional, Engelhorn, K., additional, Hilsabeck, T. J., additional, Chung, T. M., additional, Dymoke-Bradshaw, A. K. L., additional, Hares, J. D., additional, Claus, L. D., additional, England, T. D., additional, Mitchell, B. B., additional, Porter, J. L., additional, Robertson, G., additional, and Sanchez, M. O., additional

Published
2018
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40. Development of new platforms for hydrodynamic instability and asymmetry measurements in deceleration phase of indirectly driven implosions on NIF

Author

Pickworth, L. A., primary, Hammel, B. A., additional, Smalyuk, V. A., additional, Robey, H. F., additional, Tommasini, R., additional, Benedetti, L. R., additional, Berzak Hopkins, L., additional, Bradley, D. K., additional, Dayton, M., additional, Felker, S., additional, Field, J. E., additional, Haan, S. W., additional, Haid, B., additional, Hatarik, R., additional, Hartouni, E., additional, Holunga, D., additional, Hoppe, M., additional, Izumi, N., additional, Johnson, S., additional, Khan, S., additional, Kohut, T., additional, Lahmann, B., additional, Landen, O. L., additional, LePape, S., additional, MacPhee, A. G., additional, Marley, E., additional, Meezan, N. B., additional, Milovich, J., additional, Nagel, S. R., additional, Nikroo, A., additional, Pak, A. E., additional, Petrasso, R., additional, Remington, B. A., additional, Rice, N. G., additional, Scott, H. A., additional, Springer, P. T., additional, Stadermann, M., additional, Walters, C., additional, Widmann, K., additional, and Hsing, W. W., additional

Published
2018
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41. Visualizing deceleration-phase instabilities in inertial confinement fusion implosions using an “enhanced self-emission” technique at the National Ignition Facility

Author

Pickworth, L. A., primary, Hammel, B. A., additional, Smalyuk, V. A., additional, Robey, H. F., additional, Benedetti, L. R., additional, Berzak Hopkins, L., additional, Bradley, D. K., additional, Field, J. E., additional, Haan, S. W., additional, Hatarik, R., additional, Hartouni, E., additional, Izumi, N., additional, Johnson, S., additional, Khan, S., additional, Lahmann, B., additional, Landen, O. L., additional, Le Pape, S., additional, MacPhee, A. G., additional, Meezan, N. B., additional, Milovich, J., additional, Nagel, S. R., additional, Nikroo, A., additional, Pak, A. E., additional, Petrasso, R., additional, Remington, B. A., additional, Rice, N. G., additional, Springer, P. T., additional, Stadermann, M., additional, Widmann, K., additional, and Hsing, W., additional

Published
2018
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43. X-ray induced pinhole closure in point-projection x-ray radiography.

Author

Bullock, A. B., Landen, O. L., Blue, B. E., Edwards, J., and Bradley, D. K.

Subjects
X-rays, RADIOGRAPHY, IMAGE quality in radiography, X-ray lasers, HYDRODYNAMICS
Abstract

In pinhole-assisted point-projection x-ray radiography (or “backlighting”), pinholes are placed between the sample of interest and an x-ray source (or “backlighter”) to effectively limit the source size and hence improve the spatial resolution of the system. Pinholes are generally placed close to such x-ray backlighters to increase the field of view, leading to possible vaporization and pinhole closure due to x-ray driven ablation, thereby potentially limiting the usefulness of this method. An experimental study and modeling of time-dependent closure and resolution is presented. The pinhole closure time scale is studied for various pinhole sizes, pinhole-to-backlighter separations, and filtering conditions. In addition the time-dependent resolution is extracted from one-dimensional wire imaging prior to pinhole closure. Cylindrical hydrodynamic modeling of the pinhole closure shows reasonable agreement with data, giving us a predictive capability for pinhole closure in future experiments. [ABSTRACT FROM AUTHOR]

Published
2006
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44. Examining the radiation drive asymmetries present in the high foot series of implosion experiments at the National Ignition Facility

Author

Pak, A., primary, Divol, L., additional, Kritcher, A. L., additional, Ma, T., additional, Ralph, J. E., additional, Bachmann, B., additional, Benedetti, L. R., additional, Casey, D. T., additional, Celliers, P. M., additional, Dewald, E. L., additional, Döppner, T., additional, Field, J. E., additional, Fratanduono, D. E., additional, Berzak Hopkins, L. F., additional, Izumi, N., additional, Khan, S. F., additional, Landen, O. L., additional, Kyrala, G. A., additional, LePape, S., additional, Millot, M., additional, Milovich, J. L., additional, Moore, A. S., additional, Nagel, S. R., additional, Park, H.-S., additional, Rygg, J. R., additional, Bradley, D. K., additional, Callahan, D. A., additional, Hinkel, D. E., additional, Hsing, W. W., additional, Hurricane, O. A., additional, Meezan, N. B., additional, Moody, J. D., additional, Patel, P., additional, Robey, H. F., additional, Schneider, M. B., additional, Town, R. P. J., additional, and Edwards, M. J., additional

Published
2017
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45. The role of hot spot mix in the low-foot and high-foot implosions on the NIF

Author

Ma, T., primary, Patel, P. K., additional, Izumi, N., additional, Springer, P. T., additional, Key, M. H., additional, Atherton, L. J., additional, Barrios, M. A., additional, Benedetti, L. R., additional, Bionta, R., additional, Bond, E., additional, Bradley, D. K., additional, Caggiano, J., additional, Callahan, D. A., additional, Casey, D. T., additional, Celliers, P. M., additional, Cerjan, C. J., additional, Church, J. A., additional, Clark, D. S., additional, Dewald, E. L., additional, Dittrich, T. R., additional, Dixit, S. N., additional, Döppner, T., additional, Dylla-Spears, R., additional, Edgell, D. H., additional, Epstein, R., additional, Field, J., additional, Fittinghoff, D. N., additional, Frenje, J. A., additional, Gatu Johnson, M., additional, Glenn, S., additional, Glenzer, S. H., additional, Grim, G., additional, Guler, N., additional, Haan, S. W., additional, Hammel, B. A., additional, Hatarik, R., additional, Herrmann, H. W., additional, Hicks, D., additional, Hinkel, D. E., additional, Berzak Hopkins, L. F., additional, Hsing, W. W., additional, Hurricane, O. A., additional, Jones, O. S., additional, Kauffman, R., additional, Khan, S. F., additional, Kilkenny, J. D., additional, Kline, J. L., additional, Kozioziemski, B., additional, Kritcher, A., additional, Kyrala, G. A., additional, Landen, O. L., additional, Lindl, J. D., additional, Le Pape, S., additional, MacGowan, B. J., additional, Mackinnon, A. J., additional, MacPhee, A. G., additional, Meezan, N. B., additional, Merrill, F. E., additional, Moody, J. D., additional, Moses, E. I., additional, Nagel, S. R., additional, Nikroo, A., additional, Pak, A., additional, Parham, T., additional, Park, H.-S., additional, Ralph, J. E., additional, Regan, S. P., additional, Remington, B. A., additional, Robey, H. F., additional, Rosen, M. D., additional, Rygg, J. R., additional, Ross, J. S., additional, Salmonson, J. D., additional, Sater, J., additional, Sayre, D., additional, Schneider, M. B., additional, Shaughnessy, D., additional, Sio, H., additional, Spears, B. K., additional, Smalyuk, V., additional, Suter, L. J., additional, Tommasini, R., additional, Town, R. P. J., additional, Volegov, P. L., additional, Wan, A., additional, Weber, S. V., additional, Widmann, K., additional, Wilde, C. H., additional, Yeamans, C., additional, and Edwards, M. J., additional

Published
2017
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46. The relationship between gas fill density and hohlraum drive performance at the National Ignition Facility

Author

Hall, G. N., primary, Jones, O. S., additional, Strozzi, D. J., additional, Moody, J. D., additional, Turnbull, D., additional, Ralph, J., additional, Michel, P. A., additional, Hohenberger, M., additional, Moore, A. S., additional, Landen, O. L., additional, Divol, L., additional, Bradley, D. K., additional, Hinkel, D. E., additional, Mackinnon, A. J., additional, Town, R. P. J., additional, Meezan, N. B., additional, Berzak Hopkins, L., additional, and Izumi, N., additional

Published
2017
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47. Short pulse, high resolution, backlighters for point projection high-energy radiography at the National Ignition Facility

Author

Tommasini, R., primary, Bailey, C., additional, Bradley, D. K., additional, Bowers, M., additional, Chen, H., additional, Di Nicola, J. M., additional, Di Nicola, P., additional, Gururangan, G., additional, Hall, G. N., additional, Hardy, C. M., additional, Hargrove, D., additional, Hermann, M., additional, Hohenberger, M., additional, Holder, J. P., additional, Hsing, W., additional, Izumi, N., additional, Kalantar, D., additional, Khan, S., additional, Kroll, J., additional, Landen, O. L., additional, Lawson, J., additional, Martinez, D., additional, Masters, N., additional, Nafziger, J. R., additional, Nagel, S. R., additional, Nikroo, A., additional, Okui, J., additional, Palmer, D., additional, Sigurdsson, R., additional, Vonhof, S., additional, Wallace, R. J., additional, and Zobrist, T., additional

Published
2017
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49. Applications and results of X-ray spectroscopy in implosion experiments on the National Ignition Facility

Author

Epstein, R., primary, Regan, S. P., additional, Hammel, B. A., additional, Suter, L. J., additional, Scott, H. A., additional, Barrios, M. A., additional, Bradley, D. K., additional, Callahan, D. A., additional, Cerjan, C., additional, Collins, G. W., additional, Dixit, S. N., additional, Döppner, T., additional, Edwards, M. J., additional, Farley, D. R., additional, Fournier, K. B., additional, Glenn, S., additional, Glenzer, S. H., additional, Golovkin, I. E., additional, Hamza, A., additional, Hicks, D. G., additional, Izumi, N., additional, Jones, O. S., additional, Key, M. H., additional, Kilkenny, J. D., additional, Kline, J. L., additional, Kyrala, G. A., additional, Landen, O. L., additional, Ma, T., additional, MacFarlane, J. J., additional, Mackinnon, A. J., additional, Mancini, R. C., additional, McCrory, R. L., additional, Meyerhofer, D. D., additional, Meezan, N. B., additional, Nikroo, A., additional, Park, H.-S., additional, Patel, P. K., additional, Ralph, J. E., additional, Remington, B. A., additional, Sangster, T. C., additional, Smalyuk, V. A., additional, Springer, P. T., additional, Town, R. P. J., additional, and Tucker, J. L., additional

Published
2017
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50. Numerical modeling of effects of power imbalance on irradiation nonuniformities.

Author

McKenty, P. W., Verdon, C. P., Skupsky, S., McCrory, R. L., Bradley, D. K., Seka, W., and Jaanimagi, P. A.

Subjects
LASERS, IRRADIATION
Abstract

Deals with a study which examined the importance of various sources of power imbalance of the 24 beam OMEGA laser system in contributing to laser irradiation non-uniformity. Methods used to characterize the irradiation non-uniformities; Impact of power imabalance on the level of irradiation non-uniformity; OMEGA experiment.

Published
1990
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