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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. Measurements of dense fuel hydrodynamics in the NIF burning plasma experiments using backscattered neutron spectroscopy

Author

Crilly, A. J., Schlossberg, D. J., Appelbe, B. D., Moore, A. S., Jeet, J., Kerr, S. M., Rubery, M. S., Lahmann, B., O'Neill, S., Forrest, C. J., Mannion, O. M., and Chittenden, J. P.

Subjects
Physics - Plasma Physics
Abstract

The hydrodynamics of the dense confining fuel shell is of great importance in defining the behaviour of the burning plasma and burn propagation regimes of inertial confinement fusion experiments. However, it is difficult to probe due to its low emissivity in comparison to the central fusion core. In this work, we utilise the backscattered neutron spectroscopy technique to directly measure the hydrodynamic conditions of the dense fuel during fusion burn. Experimental data is fit to obtain dense fuel velocities and apparent ion temperatures. Trends of these inferred parameters with yield and velocity of the burning plasma are used to investigate their dependence on alpha heating and low mode drive asymmetry. It is shown that the dense fuel layer has an increased outward radial velocity as yield increases showing burn has continued into re-expansion, a key signature of hotspot ignition. Comparison with analytic and simulation models show that the observed dense fuel parameters are displaying signatures of burn propagation into the dense fuel layer, including a rapid increase in dense fuel apparent ion temperature with neutron yield.

Published
2023
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3. A multi-rocket piston model to study three-dimensional asymmetries in implosions at the national ignition facility

Author

Casey, D.T., Kunimune, J., Hurricane, O.A., Landen, O.L., Springer, P., Bionta, R.M., Young, C.V., Nora, R.C., MacGowan, B.J., Gaffney, J.A., Kustowski, B., Weber, C., Kritcher, A., Milovich, J., Haan, S., Johnson, M. Gatu, Schlossberg, D., Kerr, S., Volegov, P.L., Fittinghoff, D.N., Geppert-Kleinrath, V., Wilde, C.H., and Freeman, M.

Published
2025
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4. 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

5. Evidence for suprathermal ion distribution in burning plasmas

Author

Hartouni, E. P., Moore, A. S., Crilly, A. J., Appelbe, B. D., Amendt, P. A., Baker, K. L., Casey, D. T., Clark, D. S., Döppner, T., Eckart, M. J., Field, J. E., Gatu-Johnson, M., Grim, G. P., Hatarik, R., Jeet, J., Kerr, S. M., Kilkenny, J., Kritcher, A. L., Meaney, K. D., Milovich, J. L., Munro, D. H., Nora, R. C., Pak, A. E., Ralph, J. E., Robey, H. F., Ross, J. S., Schlossberg, D. J., Sepke, S. M., Spears, B. K., Young, C. V., and Zylstra, A. B.

Published
2023
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6. Neutron-induced backgrounds in coaxial cables on the South Pole neutron time-of-flight detector at the National Ignition Facility.

Author

Kerr, S., Jeet, J., Mariscal, E., Hahn, K. D., Eckart, M. J., Khater, H., Bionta, R. M., Casey, D., Carrera, J., Delora-Ellefson, J., Hartouni, E. P., and Schlossberg, D. J.

Abstract

As neutron yields increase at fusion facilities, a universal symptom the community must deal with is MeV neutron-induced backgrounds in cables running to diagnostics. On the first Gain > 1 plasmas in the world, the National Ignition Facility (NIF) neutron time-of-flight (nToF) diagnostic registered significant cable backgrounds that compromised key performance measurements. The South Pole nToF is uniquely located inside the NIF Target Bay shield walls, ∼18 m from the fusion source, and consequently has long coaxial cable runs (> 20 m) that see significant neutron fluence. The resulting neutron-driven current in the cable is comparable to the downscattered neutron signal, compromising the downscattered ratio (DSR) measurement. We have characterized this background with a series of on-shot tests and developed a background subtraction technique to mitigate these effects. The background subtracted DSR results are validated against zirconium activation measurements, indicating that we have successfully reclaimed high-quality data output. The ion temperature measurement is found to not be affected by this background. Alternative approaches to addressing neutron-induced cable backgrounds are presented for potential future hardware upgrades. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Inferring fusion nuclear burnwidths with low gain photomultiplier impulse response functions.

Author

Meaney, K. D., Jeet, J., Carrera, J., Mariscal, E., Schlossberg, D., Moore, A., Eckart, M., Milnes, J., Hink, P., Hillyard, P., Holdener, D., Herrmann, H., Geppert-Kleinrath, H., and Kim, Y.

Abstract

When an inertial confinement fusion implosion is compressed, it maintains thermonuclear density and temperatures for a very short time scale, about 100 ps. The Gamma Reaction History diagnostic measures the time evolution of the fusion burn, but its temporal resolution is limited by the use of a photomultiplier tube (PMT) to amplify the photon signal. Multichannel plate-based PMTs have a fast (∼120 ps) full-width at half-max impulse response function (IRF), but the time scale is similar to the incoming physics signal. An analysis routine is used to remove the effect of the PMT IRF and infer the incident fusion burnwidth. With the National Ignition Facility achieving ignition and creating much brighter signals, the PMTs are run at gains three orders of magnitude lower than nominal operation. Calibration at these settings shows the PMT IRFs get ∼15% wider. Taking the gain-dependent IRF can affect the inferred nuclear burnwidths by up to ∼15%. [ABSTRACT FROM AUTHOR]

Published
2024
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8. 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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9. 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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11. Learning from each other: Cross-cutting diagnostic development activities between magnetic and inertial confinement fusion (invited).

Author

Gatu Johnson, M., Schlossberg, D., Appelbe, B., Ball, J., Bitter, M., Casey, D. T., Celora, A., Ceurvorst, L., Chen, H., Conroy, S., Crilly, A., Croci, G., Dal Molin, A., Delgado-Aparicio, L., Efthimion, P., Eriksson, B., Eriksson, J., Forrest, C., Fry, C., and Frenje, J.

Subjects
*INERTIAL confinement fusion, *MAGNETIC confinement, *CHEMICAL vapor deposition, *NEUTRON spectroscopy, *SPECTRAL imaging
Abstract

Inertial Confinement Fusion and Magnetic Confinement Fusion (ICF and MCF) follow different paths toward goals that are largely common. In this paper, the claim is made that progress can be accelerated by learning from each other across the two fields. Examples of successful cross-community knowledge transfer are presented that highlight the gains from working together, specifically in the areas of high-resolution x-ray imaging spectroscopy and neutron spectrometry. Opportunities for near- and mid-term collaboration are identified, including in chemical vapor deposition diamond detector technology, using gamma rays to monitor fusion gain, handling neutron-induced backgrounds, developing radiation hard technology, and collecting fundamental supporting data needed for diagnostic analysis. Fusion research is rapidly moving into the igniting and burning regimes, posing new opportunities and challenges for ICF and MCF diagnostics. This includes new physics to probe, such as alpha heating; increasingly harsher environmental conditions; and (in the slightly longer term) the need for new plant monitoring diagnostics. Substantial overlap is expected in all of these emerging areas, where joint development across the two subfields as well as between public and private researchers can be expected to speed up advancement for all. [ABSTRACT FROM AUTHOR]

Published
2024
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12. Diagnosing up-scattered deuterium–tritium fusion neutrons produced in burning plasmas at the National Ignition Facility (invited).

Author

Jeet, J., Appelbe, B. D., Crilly, A. J., Divol, L., Eckart, M., Hahn, K. D., Hartouni, E. P., Hayes, A., Kerr, S., Kim, Y., Mariscal, E., Moore, A. S., Ramirez, A., Rusev, G., and Schlossberg, D. J.

Subjects
NEUTRON temperature, NEUTRONS, TRITIUM, DEUTERIUM, INERTIAL confinement fusion, IONS
Abstract

In the push to higher performance fusion plasmas, two critical quantities to diagnose are α-heat deposition that can improve and impurities mixed into the plasma that can limit performance. In high-density, highly collisional inertial confinement fusion burning plasmas, there is a significant probability that deuterium–tritium (DT) fusion products, 14.1 MeV neutrons and 3.5 MeV α-particles, will collide with and deposit energy onto ("up-scatter") surrounding deuterium and tritium fuel ions. These up-scattered D and T ions can then undergo fusion while in-flight and produce an up-scattered neutron (15–30 MeV). These reaction-in-flight (RIF) neutrons can then be uniquely identified in the measured neutron energy spectrum. The magnitude, shape, and relative size of this spectral feature can inform models of stopping-power in the DT plasma and hence is directly proportional to α-heat deposition. In addition, the RIF spectrum can be related to mix into the burning fuel, particularly relevant for high-Z shell and other emerging National Ignition Facility platforms. The neutron time-of-flight diagnostic upgrades needed to obtain this small signal, ∼10−5 times the primary DT neutron peak, will be discussed. Results from several gain > 1 implosions will be shown and compared to previous RIF spectra. Finally, comparisons of experimental data to a simplified computational model will be made. [ABSTRACT FROM AUTHOR]

Published
2024
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13. Diagnosing hot-spot symmetry in surrogate ignition experiments via secondary DT-neutron spectroscopy at the NIF.

Author

Adrian, P. J., Bionta, R., Casey, D., Johnson, M. Gatu, Kerr, S., Lahmann, B., Li, C. K., Nora, R., Petrasso, R. D., Rigon, G., Schlossberg, D., Séguin, F. H., and Frenje, J. A.

Subjects
MONTE Carlo method, X-ray imaging, NUCLEAR fusion, X-ray spectra, IMPLOSIONS, INERTIAL confinement fusion
Abstract

The directional energy spectrum of neutrons generated from the in-flight fusion reaction of 1-MeV tritons contains information about the hot-spot symmetry. The National Ignition Facility (NIF) fields Symmetry Capsule (Symcap) implosions, which have historically measured the symmetry of the radiation, drive by measuring the hot-spot shape via x-ray self-emission. Symcaps are used to tune the hot-spot symmetry for ignition experiments at the NIF. This work shows the relationship between directional secondary DT-n spectra and x-ray imaging data for a large database of Symcap implosions. A correlation is observed between the relative widths of the DT-n spectra measured with nTOFs and the shape measured with x-ray imaging. A Monte Carlo model, which computes the directional secondary DT-n spectrum, is used to interpret the results. A comparison of the x-ray and secondary DT-n data with the Monte Carlo model indicates that 56% of the variance between the two datasets is explained by a P2 asymmetry. More advanced simulations using HYDRA suggest that the unaccounted variance is due to P1 and P4 asymmetries present in the hot spot. The comparison of secondary DT-n data and x-ray imaging data to the modeling shows the DT-n data contain important information that supplements current P2 measurements and contain new information about the P1 asymmetry. [ABSTRACT FROM AUTHOR]

Published
2024
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14. The next-generation magnetic recoil spectrometer (MRSnext) on OMEGA and NIF for diagnosing ion temperature, yield, areal density, and alpha heating.

Author

Wink, C. W., Gatu Johnson, M., Mackie, S., Kunimune, J. H., Dannhoff, S. G., Lawrence, Y., Berg, G. P. A., Casey, D. T., Schlossberg, D. J., Gopalaswamy, V., Katz, J., Regan, S. P., Stoeckl, C., Burgett, T., Ivancic, S., McClow, H., Scott, M., Frelier, J., and Frenje, J. A.

Subjects
NEUTRON measurement, MAGNETIC spectrometer, FOCAL planes, ION temperature, TURNAROUND time, INERTIAL confinement fusion
Abstract

The next-generation magnetic recoil spectrometer (MRSnext) is being designed to replace the current MRS at the National Ignition Facility and OMEGA for measurements of the neutron spectrum from an inertial confinement fusion implosion. The MRSnext will provide a far-superior performance and faster data turnaround than the current MRS systems, i.e., a 2× and 6× improvement in energy resolution at the NIF and OMEGA, respectively, and 20× improvement in data turnaround time. The substantially improved performance of the MRSnext is enabled by using electromagnets that provide a short focal plane (12–16 cm) and unprecedented flexibility for a wide range of applications. In addition to being able to measure neutron yield, apparent ion temperature, areal density, and plasma-flow velocity over a wide range of yields, the NIF MRSnext will be able to directly, uniquely assess the alpha heating of the fuel ions through measurements of the alpha knock-on tail in the neutron spectrum. The goal is to implement a radiation-hard electronic detection system capable of providing rapid data acquisition and analysis. The development of the MRSnext will also set the foundation for the more advanced, time-resolving MRSt and serve as a testbed for its implementation on the NIF. [ABSTRACT FROM AUTHOR]

Published
2024
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16. Energy Principles of Scientific Breakeven in an Inertial Fusion Experiment

Author

Hurricane, O. A., primary, Callahan, D. A., additional, Casey, D. T., additional, Christopherson, A. R., additional, Kritcher, A. L., additional, Landen, O. L., additional, Maclaren, S. A., additional, Nora, R., additional, Patel, P. K., additional, Ralph, J., additional, Schlossberg, D., additional, Springer, P. T., additional, Young, C. V., additional, and Zylstra, A. B., additional

Published
2024
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17. Design of the first fusion experiment to achieve target energy gain G>1

Author

Kritcher, A. L., primary, Zylstra, A. B., additional, Weber, C. R., additional, Hurricane, O. A., additional, Callahan, D. A., additional, Clark, D. S., additional, Divol, L., additional, Hinkel, D. E., additional, Humbird, K., additional, Jones, O., additional, Lindl, J. D., additional, Maclaren, S., additional, Strozzi, D. J., additional, Young, C. V., additional, Allen, A., additional, Bachmann, B., additional, Baker, K. L., additional, Braun, T., additional, Brunton, G., additional, Casey, D. T., additional, Chapman, T., additional, Choate, C., additional, Dewald, E., additional, Di Nicola, J.-M. G., additional, Edwards, M. J., additional, Haan, S., additional, Fehrenbach, T., additional, Hohenberger, M., additional, Kur, E., additional, Kustowski, B., additional, Kong, C., additional, Landen, O. L., additional, Larson, D., additional, MacGowan, B. J., additional, Marinak, M., additional, Millot, M., additional, Nikroo, A., additional, Nora, R., additional, Pak, A., additional, Patel, P. K., additional, Ralph, J. E., additional, Ratledge, M., additional, Rubery, M. S., additional, Schlossberg, D. J., additional, Sepke, S. M., additional, Stadermann, M., additional, Suratwala, T. I., additional, Tommasini, R., additional, Town, R., additional, Woodworth, B., additional, Van Wonterghem, B., additional, and Wild, C., additional

Published
2024
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18. Observations and properties of the first laboratory fusion experiment to exceed a target gain of unity

Author

Pak, A., primary, Zylstra, A. B., additional, Baker, K. L., additional, Casey, D. T., additional, Dewald, E., additional, Divol, L., additional, Hohenberger, M., additional, Moore, A. S., additional, Ralph, J. E., additional, Schlossberg, D. J., additional, Tommasini, R., additional, Aybar, N., additional, Bachmann, B., additional, Bionta, R. M., additional, Fittinghoff, D., additional, Gatu Johnson, M., additional, Geppert Kleinrath, H., additional, Geppert Kleinrath, V., additional, Hahn, K. D., additional, Rubery, M. S., additional, Landen, O. L., additional, Moody, J. D., additional, Aghaian, L., additional, Allen, A., additional, Baxamusa, S. H., additional, Bhandarkar, S. D., additional, Biener, J., additional, Birge, N. W., additional, Braun, T., additional, Briggs, T. M., additional, Choate, C., additional, Clark, D. S., additional, Crippen, J. W., additional, Danly, C., additional, Döppner, T., additional, Durocher, M., additional, Erickson, M., additional, Fehrenbach, T., additional, Freeman, M., additional, Havre, M., additional, Hayes, S., additional, Hilsabeck, T., additional, Holder, J. P., additional, Humbird, K. D., additional, Hurricane, O. A., additional, Izumi, N., additional, Kerr, S. M., additional, Khan, S. F., additional, Kim, Y. H., additional, Kong, C., additional, Jeet, J., additional, Kozioziemski, B., additional, Kritcher, A. L., additional, Lamb, K. M., additional, Lemos, N. C., additional, MacGowan, B. J., additional, Mackinnon, A. J., additional, MacPhee, A. G., additional, Marley, E. V., additional, Meaney, K., additional, Millot, M., additional, Di Nicola, J.-M. G., additional, Nikroo, A., additional, Nora, R., additional, Ratledge, M., additional, Ross, J. S., additional, Shin, S. J., additional, Smalyuk, V. A., additional, Stadermann, M., additional, Stoupin, S., additional, Suratwala, T., additional, Trosseille, C., additional, Van Wonterghem, B., additional, Weber, C. R., additional, Wild, C., additional, Wilde, C., additional, Wooddy, P. T., additional, Woodworth, B. N., additional, and Young, C. V., additional

Published
2024
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19. Design and analysis of dudded fuel experiments at the National Ignition Facility.

Author

Christopherson, A. R., Schlossberg, D., MacLaren, S., Weber, C., Zylstra, A., Hurricane, O. A., Kritcher, A., Hinkel, D., Spears, B. K., Pak, A., Nora, R., Kustowski, B., Baker, K., Milovich, J., Munro, D., Clark, D., Sepke, S., Shroeder, C., Bhandarkar, S., and Sater, J.

Abstract

Recent experiments conducted at the National Ignition Facility (NIF) within the past 2 years have achieved the burning plasma state and exceeded the Lawson criterion for the first time in the laboratory. Here, we report on a set of experiments where the deuterium and tritium (DT) ice layers were replaced with dudded tritium, hydrogen, and deuterium (THD) fuel mixtures to remove the influence of alpha-heating on hot spot dynamics. The hot spot compression and yield in the absence of alpha particle self-heating were measured to assess the proximity of NIF implosions toward the ignition cliff. We find that the "burn-off" Lawson parameters χ n o α inferred from the THD experiments are in good agreement with the inferences from postshot simulations of the DT-layered implosions. The THD for burning plasma shot N210307 yielded χ n o α ≈ 0.88 ± 0.03 while the THD for ignition shot N210808 yielded χ n o α ≈ 1.04 ± 0.04. These results also provide important context for the observed variability in the repeat attempts of ignition shot N210808 since implosions on the ignition cliff are expected to exhibit very large variations in the fusion yield from small changes in the initial conditions. [ABSTRACT FROM AUTHOR]

Published
2024
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20. Design of first experiment to achieve fusion target gain > 1.

Author

Kritcher, A. L., Schlossberg, D. J., Weber, C. R., Young, C. V., Hurricane, O. A., Dewald, E., Zylstra, A. B., Allen, A., Bachmann, B., Baker, K. L., Baxamusa, S., Braun, T., Brunton, G., Callahan, D. A., Casey, D. T., Chapman, T., Choate, C., Clark, D. S., Nicola, J.-M. G. Di, and Divol, L.

Abstract

A decades-long quest to achieve fusion energy target gain and ignition in a controlled laboratory experiment, dating back to 1962, has been realized at the National Ignition Facility (NIF) on December 5, 2022 [Abu-Shawareb et al., Phys. Rev. Lett. 132, 065102 (2024)] where an imploded pellet of deuterium and tritium (DT) fuel generated more fusion energy (3.15 MJ) than laser energy incident on the target (2.05 MJ). In these experiments, laser beams incident on the inside of a cylindrical can (Hohlraum) generate an intense ∼ 3 × 106 million degree x-ray radiation bath that is used to spherically implode ∼ 2 mm diameter pellets containing frozen deuterium and tritium. The maximum fusion energy produced in this configuration to date is 3.88 MJ using 2.05 MJ of incident laser energy and 5.2 MJ using 2.2 MJ of incident laser energy, producing a new record target gain of ∼ 2.4×. This paper describes the physics (target and laser) design of this platform and follow-on experiments that show increased performance. We show robust megajoule fusion energy output using this design as well as explore design modification using radiation hydrodynamic simulations benchmarked against experimental data, which can further improve the performance of this platform. [ABSTRACT FROM AUTHOR]

Published
2024
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21. Increased compression in HDC-based ablator implosions using modified drive profile

Author

Tommasini, R., primary, Casey, D. T., additional, Clark, D., additional, Do, A., additional, Baker, K. L., additional, Landen, O. L., additional, Smalyuk, V. A., additional, Weber, C., additional, Bachmann, B., additional, Hartouni, E., additional, Kerr, S., additional, Krauland, C., additional, Marley, E. V., additional, Millot, M., additional, Milovich, J., additional, Nora, R. C., additional, Pak, A. E., additional, Schlossberg, D., additional, Woodworth, B., additional, Briggs, T. M., additional, Holunga, D. M., additional, Nikroo, A., additional, and Stadermann, M., additional

Published
2023
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22. Measurements of improved stability to achieve higher fuel compression in ICF

Author

Do, A., primary, Casey, D. T., additional, Clark, D. S., additional, Bachmann, B., additional, Baker, K. L., additional, Braun, T., additional, Briggs, T. M., additional, Chapman, T. D, additional, Celliers, P. M., additional, Chen, H., additional, Choate, C., additional, Dewald, E. L., additional, Divol, L., additional, Fathi, G., additional, Fittinghoff, D. N., additional, Hall, G. N., additional, Hartouni, E., additional, Holunga, D. M., additional, Khan, S. F., additional, Kritcher, A. L., additional, Landen, O. L., additional, MacPhee, A. G., additional, Millot, M., additional, Marley, E. V., additional, Milovich, J. L., additional, Nikroo, A., additional, Pak, A. E., additional, Schlossberg, D. J., additional, Smalyuk, V. A., additional, Stadermann, M., additional, Strozzi, D. J., additional, Tommasini, R., additional, Weber, C. R., additional, Woodworth, B. N., additional, Yanagisawa, D. K., additional, Birge, N. W., additional, Danly, C. R., additional, Durocher, M., additional, Freeman, M. S., additional, Geppert-Kleinrath, H., additional, Geppert-Kleinrath, V., additional, Kim, Y., additional, Meaney, K. D, additional, Wilde, C. H., additional, Johnson, M. Gatu, additional, Allen, A., additional, Ratledge, M., additional, Kong, C., additional, Fehrenbach, T., additional, and Wild, C., additional

Published
2023
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23. 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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24. Improved gamma imaging at NIF using the ceramic scintillator GYGAG

Author

Rubery, Michael, primary, Fittinghoff, D. N., additional, Cherepy, N. J., additional, Danly, C., additional, Geppert-Kleinrath, V., additional, Fatherley, V., additional, Jorgenson, Harold J., additional, Freeman, M. S., additional, Wilde, C., additional, Volegov, P., additional, Durocher, Mora, additional, Saavedra, Gary, additional, Moore, A. S., additional, Schlossberg, D. J., additional, Casco, E., additional, Payne, S. A., additional, Osborne, R. A., additional, Seeley, Z. M., additional, McNamee, C. J., additional, and Waltz, C., additional

Published
2023
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25. Correlations between asymmetric compression, burn amplification, and hot-spot velocities in inertial confinement fusion implosions

Author

Nora, R. C., primary, Birge, N., additional, Casey, D., additional, Danly, C., additional, Dewald, E. L., additional, Djordjevic, B. Z., additional, Do, A., additional, Durocher, M., additional, Field, J. E., additional, Fittinghoff, D., additional, Freeman, M. S., additional, Gaffney, J., additional, Geppert Kleinrath, V., additional, Haan, S., additional, Hahn, K., additional, Hartouni, E., additional, Hohenberger, M., additional, Kerr, S., additional, Landen, O. L., additional, Milovich, J., additional, Moore, A. S., additional, Patel, P., additional, Schlossberg, D. J., additional, Sepke, S. M., additional, Spears, B. K., additional, Volegov, P. L., additional, and Wilde, C., additional

Published
2023
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26. Dynamics and Power Balance of Near Unity Target Gain Inertial Confinement Fusion Implosions

Author

Pak, A., primary, Divol, L., additional, Casey, D. T., additional, Khan, S. F., additional, Kritcher, A. L., additional, Ralph, J. E., additional, Tommasini, R., additional, Trosseille, C., additional, Zylstra, A. B., additional, Baker, K. L., additional, Birge, N. W., additional, Bionta, R., additional, Bachmann, B., additional, Dewald, E. L., additional, Doeppner, T., additional, Freeman, M. S., additional, Fittinghoff, D. N., additional, Geppert-Kleinrath, V., additional, Geppert-Kleinrath, H., additional, Hahn, K. D., additional, Hohenberger, M., additional, Holder, J., additional, Kerr, S., additional, Kim, Y., additional, Kozioziemski, B., additional, Lamb, K., additional, MacGowan, B. J., additional, MacPhee, A. G., additional, Meaney, K. D., additional, Moore, A. S., additional, Schlossberg, D. J., additional, Stoupin, S., additional, Volegov, P., additional, Wilde, C., additional, Young, C. V., additional, Landen, O. L., additional, and Town, R. P. J., additional

Published
2023
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27. Neutron time of flight (nToF) detectors for inertial fusion experiments

Author

Moore, A. S., primary, Schlossberg, D. J., additional, Appelbe, B. D., additional, Chandler, G. A., additional, Crilly, A. J., additional, Eckart, M. J., additional, Forrest, C. J., additional, Glebov, V. Y., additional, Grim, G. P., additional, Hartouni, E. P., additional, Hatarik, R., additional, Kerr, S. M., additional, Kilkenny, J., additional, and Knauer, J. P., additional

Published
2023
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28. Measuring and simulating ice–ablator mix in inertial confinement fusion

Author

Bachmann, B., primary, MacLaren, S. A., additional, Masse, L., additional, Bhandarkar, S., additional, Briggs, T., additional, Casey, D., additional, Divol, L., additional, Döppner, T., additional, Fittinghoff, D., additional, Freeman, M., additional, Haan, S., additional, Hall, G. N., additional, Hammel, B., additional, Hartouni, E., additional, Izumi, N., additional, Geppert-Kleinrath, V., additional, Khan, S., additional, Kozioziemski, B., additional, Krauland, C., additional, Landen, O., additional, Mariscal, D., additional, Marley, E., additional, Meaney, K., additional, Mellos, G., additional, Moore, A., additional, Pak, A., additional, Patel, P., additional, Ratledge, M., additional, Rice, N., additional, Rubery, M., additional, Salmonson, J., additional, Sater, J., additional, Schlossberg, D., additional, Schneider, M., additional, Smalyuk, V. A., additional, Trosseille, C., additional, Volegov, P., additional, Weber, C., additional, Williams, G. J., additional, and Wray, A., additional

Published
2023
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29. Development of a bright MeV photon source with compound parabolic concentrator targets on the National Ignition Facility Advanced Radiographic Capability (NIF-ARC) laser

Author

Kerr, S. M., primary, Rusby, D., additional, Williams, G. J., additional, Meaney, K., additional, Schlossberg, D. J., additional, Aghedo, A., additional, Alessi, D., additional, Ayers, J., additional, Azhar, S., additional, Aufderheide, M. B., additional, Bowers, M. W., additional, Bude, J. D., additional, Chen, H., additional, Cochran, G., additional, Crane, J., additional, Nicola, J. M. Di, additional, Fittinghoff, D. N., additional, Fitzsimmons, P., additional, Geppert-Kleinrath, H., additional, Golick, B., additional, Grim, G. P., additional, Haid, A., additional, Hamamoto, M., additional, Heredia, R., additional, Hermann, M., additional, Herriot, S., additional, Hill, M. P., additional, Hoke, W., additional, Kalantar, D., additional, Kemp, A., additional, Kim, Y., additional, LaFortune, K., additional, Lemos, N., additional, Link, A., additional, Lowe-Webb, R., additional, MacPhee, A., additional, Manuel, M., additional, Martinez, D., additional, Mauldin, M., additional, Patankar, S., additional, Pelz, L., additional, Prantil, M. A., additional, Quinn, M., additional, Siders, C. W., additional, Vonhof, S., additional, Wegner, P., additional, Wilks, S., additional, Williams, W., additional, Youngblood, K., additional, and Mackinnon, A. J., additional

Published
2023
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30. Measurement of Dark Ice-Ablator Mix in Inertial Confinement Fusion

Author

Bachmann, B., primary, MacLaren, S. A., additional, Bhandarkar, S., additional, Briggs, T., additional, Casey, D., additional, Divol, L., additional, Döppner, T., additional, Fittinghoff, D., additional, Freeman, M., additional, Haan, S., additional, Hall, G. N., additional, Hammel, B., additional, Hartouni, E., additional, Izumi, N., additional, Geppert-Kleinrath, V., additional, Khan, S., additional, Kozioziemski, B., additional, Krauland, C., additional, Landen, O., additional, Mariscal, D., additional, Marley, E., additional, Masse, L., additional, Meaney, K., additional, Mellos, G., additional, Moore, A., additional, Pak, A., additional, Patel, P., additional, Ratledge, M., additional, Rice, N., additional, Rubery, M., additional, Salmonson, J., additional, Sater, J., additional, Schlossberg, D., additional, Schneider, M., additional, Smalyuk, V. A., additional, Trosseille, C., additional, Volegov, P., additional, Weber, C., additional, Williams, G. J., additional, and Wray, A., additional

Published
2022
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31. Evidence for suprathermal ion distribution in burning plasmas

Author

Hartouni, E. P., primary, Moore, A. S., additional, Crilly, A. J., additional, Appelbe, B. D., additional, Amendt, P. A., additional, Baker, K. L., additional, Casey, D. T., additional, Clark, D. S., additional, Döppner, T., additional, Eckart, M. J., additional, Field, J. E., additional, Gatu-Johnson, M., additional, Grim, G. P., additional, Hatarik, R., additional, Jeet, J., additional, Kerr, S. M., additional, Kilkenny, J., additional, Kritcher, A. L., additional, Meaney, K. D., additional, Milovich, J. L., additional, Munro, D. H., additional, Nora, R. C., additional, Pak, A. E., additional, Ralph, J. E., additional, Robey, H. F., additional, Ross, J. S., additional, Schlossberg, D. J., additional, Sepke, S. M., additional, Spears, B. K., additional, Young, C. V., additional, and Zylstra, A. B., additional

Published
2022
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36. Experimental achievement and signatures of ignition at the National Ignition Facility

Author

Zylstra, A. B., primary, Kritcher, A. L., additional, Hurricane, O. A., additional, Callahan, D. A., additional, Ralph, J. E., additional, Casey, D. T., additional, Pak, A., additional, Landen, O. L., additional, Bachmann, B., additional, Baker, K. L., additional, Berzak Hopkins, L., additional, Bhandarkar, S. D., additional, Biener, J., additional, Bionta, R. M., additional, Birge, N. W., additional, Braun, T., additional, Briggs, T. M., additional, Celliers, P. M., additional, Chen, H., additional, Choate, C., additional, Clark, D. S., additional, Divol, L., additional, Döppner, T., additional, Fittinghoff, D., additional, Edwards, M. J., additional, Gatu Johnson, M., additional, Gharibyan, N., additional, Haan, S., additional, Hahn, K. D., additional, Hartouni, E., additional, Hinkel, D. E., additional, Ho, D. D., additional, Hohenberger, M., additional, Holder, J. P., additional, Huang, H., additional, Izumi, N., additional, Jeet, J., additional, Jones, O., additional, Kerr, S. M., additional, Khan, S. F., additional, Geppert Kleinrath, H., additional, Geppert Kleinrath, V., additional, Kong, C., additional, Lamb, K. M., additional, Le Pape, S., additional, Lemos, N. C., additional, Lindl, J. D., additional, MacGowan, B. J., additional, Mackinnon, A. J., additional, MacPhee, A. G., additional, Marley, E. V., additional, Meaney, K., additional, Millot, M., additional, Moore, A. S., additional, Newman, K., additional, Di Nicola, J.-M. G., additional, Nikroo, A., additional, Nora, R., additional, Patel, P. K., additional, Rice, N. G., additional, Rubery, M. S., additional, Sater, J., additional, Schlossberg, D. J., additional, Sepke, S. M., additional, Sequoia, K., additional, Shin, S. J., additional, Stadermann, M., additional, Stoupin, S., additional, Strozzi, D. J., additional, Thomas, C. A., additional, Tommasini, R., additional, Trosseille, C., additional, Tubman, E. R., additional, Volegov, P. L., additional, Weber, C. R., additional, Wild, C., additional, Woods, D. T., additional, Yang, S. T., additional, and Young, C. V., additional

Published
2022
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37. Design of an inertial fusion experiment exceeding the Lawson criterion for ignition

Author

Kritcher, A. L., primary, Zylstra, A. B., additional, Callahan, D. A., additional, Hurricane, O. A., additional, Weber, C. R., additional, Clark, D. S., additional, Young, C. V., additional, Ralph, J. E., additional, Casey, D. T., additional, Pak, A., additional, Landen, O. L., additional, Bachmann, B., additional, Baker, K. L., additional, Berzak Hopkins, L., additional, Bhandarkar, S. D., additional, Biener, J., additional, Bionta, R. M., additional, Birge, N. W., additional, Braun, T., additional, Briggs, T. M., additional, Celliers, P. M., additional, Chen, H., additional, Choate, C., additional, Divol, L., additional, Döppner, T., additional, Fittinghoff, D., additional, Edwards, M. J., additional, Gatu Johnson, M., additional, Gharibyan, N., additional, Haan, S., additional, Hahn, K. D., additional, Hartouni, E., additional, Hinkel, D. E., additional, Ho, D. D., additional, Hohenberger, M., additional, Holder, J. P., additional, Huang, H., additional, Izumi, N., additional, Jeet, J., additional, Jones, O., additional, Kerr, S. M., additional, Khan, S. F., additional, Geppert Kleinrath, H., additional, Geppert Kleinrath, V., additional, Kong, C., additional, Lamb, K. M., additional, Le Pape, S., additional, Lemos, N. C., additional, Lindl, J. D., additional, MacGowan, B. J., additional, Mackinnon, A. J., additional, MacPhee, A. G., additional, Marley, E. V., additional, Meaney, K., additional, Millot, M., additional, Moore, A. S., additional, Newman, K., additional, Di Nicola, J.-M. G., additional, Nikroo, A., additional, Nora, R., additional, Patel, P. K., additional, Rice, N. G., additional, Rubery, M. S., additional, Sater, J., additional, Schlossberg, D. J., additional, Sepke, S. M., additional, Sequoia, K., additional, Shin, S. J., additional, Stadermann, M., additional, Stoupin, S., additional, Strozzi, D. J., additional, Thomas, C. A., additional, Tommasini, R., additional, Trosseille, C., additional, Tubman, E. R., additional, Volegov, P. L., additional, Wild, C., additional, Woods, D. T., additional, and Yang, S. T., additional

Published
2022
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38. Design of multi neutron-to-gamma converter array for measuring time resolved ion temperature of inertial confinement fusion implosions

Author

Meaney, K. D., primary, Kim, Y., additional, Hoffman, N. M., additional, Geppert-Kleinrath, H., additional, Jorgenson, J., additional, Hochanadel, M., additional, Appelbe, B., additional, Crilly, A., additional, Basu, R., additional, Saw, E. Y., additional, Moore, A., additional, and Schlossberg, D., additional

Published
2022
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39. Measurements of fusion reaction history in inertially confined burning plasmas.

Author

Kim, Y., Meaney, K. D., Geppert-Kleinrath, H., Herrmann, H. W., Murphy, T. J., Young, C. S., Hoffman, N. M., Jorgenson, H. J., Morrow, T., Wilson, D. C., Loomis, E. N., Cerjan, C., Zylstra, A. B., Jeet, J., Schlossberg, D. J., Rubery, M. S., Moore, A. S., Kritcher, A. L., Carrera, J. A., and Mariscal, E. F.

Subjects
NUCLEAR fusion, CHERENKOV counters, PLASMA confinement, TRITIUM, GAS detectors, INERTIAL confinement fusion, DETECTORS
Abstract

Direct evidence of inertially confined fusion ignition appears in the abrupt temperature increase and consequent rapid increase in the thermonuclear burn rate as seen in the reaction history. The Gamma Reaction History (GRH) and Gas Cherenkov Detector (GCD) diagnostics are γ-based Cherenkov detectors that provide high quality measurements of deuterium–tritium fusion γ ray production and are, thus, capable of monitoring the thermonuclear burn rate. Temporal shifts in both peak burn time and burn width have been observed during recent high-yield shots (yields greater than 1017 neutrons) and are essential diagnostic signatures of the ignition process. While the current GRH and GCD detectors are fast enough to sense the changes of reaction history due to alpha heating, they do not have enough dynamic range to capture the onset of alpha heating. The next generation of instrumentation, GRH-15m, is proposed to increase the yield-rate coverage to measure the onset of alpha-heating. [ABSTRACT FROM AUTHOR]

Published
2023
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42. Observation of Hydrodynamic Flows in Imploding Fusion Plasmas on the National Ignition Facility

Author

Schlossberg, D. J., primary, Grim, G. P., additional, Casey, D. T., additional, Moore, A. S., additional, Nora, R., additional, Bachmann, B., additional, Benedetti, L. R., additional, Bionta, R. M., additional, Eckart, M. J., additional, Field, J. E., additional, Fittinghoff, D. N., additional, Gatu Johnson, M., additional, Geppert-Kleinrath, V., additional, Hartouni, E. P., additional, Hatarik, R., additional, Hsing, W. W., additional, Jarrott, L. C., additional, Khan, S. F., additional, Kilkenny, J. D., additional, Landen, O. L., additional, MacGowan, B. J., additional, Mackinnon, A. J., additional, Meaney, K. D., additional, Munro, D. H., additional, Nagel, S. R., additional, Pak, A., additional, Patel, P. K., additional, Spears, B. K., additional, Volegov, P. L., additional, and Young, C. V., additional

Published
2021
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43. Thermal decoupling of deuterium and tritium during the ICF shock-convergence phase

Author

Kabadi, N. V., Simpson, R., Adrian, P. J., Bose, A., Frenje, J. A., Gatu Johnson, M., Lahmann, B., C. K., Li, Parker, C. E., Seguin, F. H., Sutclife, G. D., Petrasso, R. D., Atzeni, S., Eriksson, J., Forrest, C., Fess, S., Yu Glebov, V., Janezic, R., Mannion, O., Rinderknecht, H. G., Rosenberg, M. J., Stoeckl, C., Kagan, G., Hoppe, M., Luo, R., Scho, M., Shuldberg, C., Sio, H. W., Sanchez, J., Berzak Hopkins, L., Schlossberg, D., Hahn, K., and Yeamans, C.

Subjects
inertial confinement fusion, shock-driven implosion, Plasma physics
Published
2021

44. Thermal decoupling of deuterium and tritium during the inertial confinement fusion shock-convergence phase

Author

Kabadi, N. V., primary, Simpson, R., additional, Adrian, P. J., additional, Bose, A., additional, Frenje, J. A., additional, Gatu Johnson, M., additional, Lahmann, B., additional, Li, C. K., additional, Parker, C. E., additional, Séguin, F. H., additional, Sutcliffe, G. D., additional, Petrasso, R. D., additional, Atzeni, S., additional, Eriksson, J., additional, Forrest, C., additional, Fess, S., additional, Glebov, V. Yu, additional, Janezic, R., additional, Mannion, O. M., additional, Rinderknecht, H. G., additional, Rosenberg, M. J., additional, Stoeckl, C., additional, Kagan, G., additional, Hoppe, M., additional, Luo, R., additional, Schoff, M., additional, Shuldberg, C., additional, Sio, H. W., additional, Sanchez, J., additional, Hopkins, L. Berzak, additional, Schlossberg, D., additional, Hahn, K., additional, and Yeamans, C., additional

Published
2021
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45. Achieving record hot spot energies with large HDC implosions on NIF in HYBRID-E

Author

Kritcher, A. L., primary, Zylstra, A. B., additional, Callahan, D. A., additional, Hurricane, O. A., additional, Weber, C., additional, Ralph, J., additional, Casey, D. T., additional, Pak, A., additional, Baker, K., additional, Bachmann, B., additional, Bhandarkar, S., additional, Biener, J., additional, Bionta, R., additional, Braun, T., additional, Bruhn, M., additional, Choate, C., additional, Clark, D., additional, Di Nicola, J. M., additional, Divol, L., additional, Doeppner, T., additional, Geppert-Kleinrath, V., additional, Haan, S., additional, Heebner, J., additional, Hernandez, V., additional, Hinkel, D., additional, Hohenberger, M., additional, Huang, H., additional, Kong, C., additional, Le Pape, S., additional, Mariscal, D., additional, Marley, E., additional, Masse, L., additional, Meaney, K. D., additional, Millot, M., additional, Moore, A., additional, Newman, K., additional, Nikroo, A., additional, Patel, P., additional, Pelz, L., additional, Rice, N., additional, Robey, H., additional, Ross, J. S., additional, Rubery, M., additional, Salmonson, J., additional, Schlossberg, D., additional, Sepke, S., additional, Sequoia, K., additional, Stadermann, M., additional, Strozzi, D., additional, Tommasini, R., additional, Volegov, P., additional, Wild, C., additional, Yang, S., additional, Young, C., additional, Edwards, M. J., additional, Landen, O., additional, Town, R., additional, and Herrmann, M., additional

Published
2021
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46. Understanding the effects of neutron scattering for neutron-yield-isotropy measurements at the NIF

Author

Hahn, K. D., primary, Bionta, R. M., additional, Khater, H., additional, Henry, E. A., additional, Moore, A. S., additional, Schlossberg, D. J., additional, Barker, D. A., additional, Casco, E. R., additional, Ehrlich, R. B., additional, Divol, L., additional, Gjemso, J. M., additional, Golod, T. B., additional, Grim, G. P., additional, Hartouni, E. P., additional, Jeet, J., additional, and Kerr, S. M., additional

Published
2021
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47. Three-dimensional diagnostics and measurements of inertial confinement fusion plasmas

Author

Schlossberg, D. J., primary, Bionta, R. M., additional, Casey, D. T., additional, Eckart, M. J., additional, Fittinghoff, D. N., additional, Geppert-Kleinrath, V., additional, Grim, G. P., additional, Hahn, K. D., additional, Hartouni, E. P., additional, Jeet, J., additional, Kerr, S. M., additional, Mackinnon, A. J., additional, Moore, A. S., additional, and Volegov, P. L., additional

Published
2021
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48. Thermal decoupling of deuterium and tritium during the inertial confinement fusion shock-convergence phase

Author

V. Kabadi, N., Simpson, R., Adrian, P. J., Bose, A., Frenje, J. A., Johnson, M. Gatu, Lahmann, B., Li, C. K., Parker, C. E., Seguin, F. H., Sutcliffe, G. D., Petrasso, R. D., Atzeni, S., Eriksson, Jacob, Forrest, C., Fess, S., Glebov, V. Yu, Janezic, R., Mannion, O. M., Rinderknecht, H. G., Rosenberg, M. J., Stoeckl, C., Kagan, G., Hoppe, M., Luo, R., Schoff, M., Shuldberg, C., Sio, H. W., Sanchez, J., Hopkins, L. Berzak, Schlossberg, D., Hahn, K., Yeamans, C., V. Kabadi, N., Simpson, R., Adrian, P. J., Bose, A., Frenje, J. A., Johnson, M. Gatu, Lahmann, B., Li, C. K., Parker, C. E., Seguin, F. H., Sutcliffe, G. D., Petrasso, R. D., Atzeni, S., Eriksson, Jacob, Forrest, C., Fess, S., Glebov, V. Yu, Janezic, R., Mannion, O. M., Rinderknecht, H. G., Rosenberg, M. J., Stoeckl, C., Kagan, G., Hoppe, M., Luo, R., Schoff, M., Shuldberg, C., Sio, H. W., Sanchez, J., Hopkins, L. Berzak, Schlossberg, D., Hahn, K., and Yeamans, C.

Abstract

A series of thin glass-shell shock-driven DT gas-filled capsule implosions was conducted at the OMEGA laser facility. These experiments generate conditions relevant to the central plasma during the shock-convergence phase of ablatively driven inertial confinement fusion (ICF) implosions. The spectral temperatures inferred from the DTn and DDn spectra are most consistent with a two-ion-temperature plasma, where the initial apparent temperature ratio, T-T/T-D, is 1.5. This is an experimental confirmation of the long-standing conjecture that plasma shocks couple energy directly proportional to the species mass in multi-ion plasmas. The apparent temperature ratio trend with equilibration time matches expected thermal equilibration described by hydrodynamic theory. This indicates that deuterium and tritium ions have different energy distributions for the time period surrounding shock convergence in ignition-relevant ICF implosions.

Published
2021
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50. Three dimensional low-mode areal-density non-uniformities in indirect-drive implosions at the National Ignition Facility

Author

Casey, D. T., primary, Landen, O. L., additional, Hartouni, E., additional, Bionta, R. M., additional, Hahn, K. D., additional, Volegov, P. L., additional, Fittinghoff, D. N., additional, Geppert-Kleinrath, V., additional, Wilde, C. H., additional, Milovich, J. L., additional, Smalyuk, V. A., additional, Field, J. E., additional, Hurricane, O. A., additional, Zylstra, A. B., additional, Kritcher, A. L., additional, Clark, D. S., additional, Young, C. V., additional, Nora, R. C., additional, Callahan, D. A., additional, MacGowan, B. J., additional, Munro, D. H., additional, Spears, B. K., additional, Peterson, J. L., additional, Gaffney, J. A., additional, Humbird, K. D., additional, Kruse, M. K. G., additional, Moore, A. S., additional, Schlossberg, D. J., additional, Gatu-Johnson, M., additional, and Frenje, J. A., additional

Published
2021
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