Performance of beryllium targets with full-scale capsules in low-fill 6.72-mm hohlraums on the National Ignition Facility

Simakov, A. N.; Wilson, D. C.; Yi, S. A.; Loomis, E. N.; Kline, J. L.; Kyrala, G. A.; Zylstra, A. B.; Dewald, E. L.; Tommasini, R.; Ralph, J. E.; Strozzi, D. J.; MacPhee, A. G.; Milovich, J. L.; Rygg, J. R.; Khan, S. F.; Ma, T.; Jarrott, L. C.; Haan, S. W.; Celliers, P. M.; Marinak, M. M.; Rinderknecht, H. G.; Robey, H. F.; Salmonson, J. D.; Stadermann, M.; Baxamusa, S.; Alford, C.; Wang, Y.; Nikroo, A.; Rice, N.; Kong, C.; Jaquez, J.; Mauldin, M.; Youngblood, K. P.; Xu, H.; Huang, H.; Sio, H.

doi:10.1063/1.4983141

Title: Performance of beryllium targets with full-scale capsules in low-fill 6.72-mm hohlraums on the National Ignition Facility

Journal Article · Wed May 10 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4983141· OSTI ID:1357132

^[1];

^[1]; Yi, S. A. ^[1]; Loomis, E. N. ^[1]; Kline, J. L. ^[1]; Kyrala, G. A. ^[1];

^[1]; Dewald, E. L. ^[2]; Tommasini, R. ^[2]; Ralph, J. E. ^[2];

^[2];

^[2]; Milovich, J. L. ^[2]; Rygg, J. R. ^[2]; Khan, S. F. ^[2]; Ma, T. ^[2];

^[2];

^[2]; Celliers, P. M. ^[2]; Marinak, M. M. ^[2] more »

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
General Atomics, San Diego, CA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

When used with 1.06-mm beryllium (Be) capsules on the National Ignition Facility, gold hohlraums with the inner diameter of 5.75 mm and helium gas fill density of 1.6 mg/cm³ exhibit significant drive degradation due to laser energy backscatter (of order 14%–17%) and “missing” X-ray drive energy (about 32% during the main pulse). Also, hard to simulate cross-beam energy transfer (CBET) must be used to control the implosion symmetry. Larger, 6.72-mm hohlraums with fill densities ≤0.6 mg/cm³ generally offer improved drive efficiency, reduced hot-electron preheat, and better control of the implosion symmetry without CBET. Recently, we carried out an exploratory campaign to evaluate performance of 1.06-mm Be capsules in such hohlraums and determine optimal hohlraum parameters. Specifically, we performed a hohlraum fill-density scan with a three-shock, 9.5-ns laser pulse and found that an appropriate axial laser repointing and azimuthal outer-quad splitting resulted in significantly improved hohlraum energetics at fill densities ≤0.3 mg/cm³ (with backscattered and “missing” energies being of about 5% and 23% of the total laser energy, respectively). The capsule shape at stagnation was slightly oblate and improved with lowering the fill density. We also performed an implosion with a lower-picket, 12.6-ns pulse at the hohlraum fill density of 0.15 mg/cm³ to observe comparable hohlraum energetics (about 3% of backscattered and 27% of “missing” energy) but an even more oblate implosion shape. Thus, achieving symmetric implosions of 1.06-mm Be capsules in low-fill, 6.72-mm gold hohlraums with reasonably low-adiabat pulses may not be feasible. However, symmetric implosions have recently been successfully demonstrated in such hohlraums with 0.8-mm Be capsules.

View Accepted Manuscript (DOE)

View Accepted Manuscript (Publisher)

Cite

Export

Save

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Contributing Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Grant/Contract Number:: AC52-06NA25396; AC52-07NA27344; NA0001808

OSTI ID:: 1357132

Alternate ID(s):: OSTI ID: 1361879; OSTI ID: 1374518

Report Number(s):: LA-UR-17-20756; LLNL-JRNL-734711

Journal Information:: Physics of Plasmas, Vol. 24, Issue 5; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 13 works

Citation information provided by
Web of Science

References (30)

Optimized beryllium target design for indirectly driven inertial confinement fusion experiments on the National Ignition Facility Simakov, Andrei N.; Wilson, Douglas C.; Yi, Sunghwan A. Physics of Plasmas, Vol. 21, Issue 2 https://doi.org/10.1063/1.4864331	journal	February 2014
First beryllium capsule implosions on the National Ignition Facility Kline, J. L.; Yi, S. A.; Simakov, A. N. Physics of Plasmas, Vol. 23, Issue 5 https://doi.org/10.1063/1.4948277	journal	May 2016
First High-Convergence Cryogenic Implosion in a Near-Vacuum Hohlraum Berzak Hopkins, L. F.; Meezan, N. B.; Le Pape, S. Physical Review Letters, Vol. 114, Issue 17 https://doi.org/10.1103/PhysRevLett.114.175001	journal	April 2015
X-ray ablation rates in inertial confinement fusion capsule materials Olson, R. E.; Rochau, G. A.; Landen, O. L. Physics of Plasmas, Vol. 18, Issue 3 https://doi.org/10.1063/1.3566009	journal	March 2011
Fuel gain exceeding unity in an inertially confined fusion implosion Hurricane, O. A.; Callahan, D. A.; Casey, D. T. Nature, Vol. 506, Issue 7488 https://doi.org/10.1038/nature13008	journal	February 2014
Experimental Demonstration of X-Ray Drive Enhancement with Rugby-Shaped Hohlraums Philippe, F.; Casner, A.; Caillaud, T. Physical Review Letters, Vol. 104, Issue 3 https://doi.org/10.1103/PhysRevLett.104.035004	journal	January 2010
High-density carbon ablator experiments on the National Ignition Facility MacKinnon, A. J.; Meezan, N. B.; Ross, J. S. Physics of Plasmas, Vol. 21, Issue 5 https://doi.org/10.1063/1.4876611	journal	May 2014
A high-resolution integrated model of the National Ignition Campaign cryogenic layered experiments Jones, O. S.; Cerjan, C. J.; Marinak, M. M. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.4718595	journal	May 2012
Suprathermal electrons generated by the two-plasmon-decay instability in gas-filled Hohlraums Regan, S. P.; Meezan, N. B.; Suter, L. J. Physics of Plasmas, Vol. 17, Issue 2 https://doi.org/10.1063/1.3309481	journal	February 2010
Streaked radiography measurements of convergent ablator performance (invited) Hicks, D. G.; Spears, B. K.; Braun, D. G. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3475727	journal	October 2010
Low-adiabat rugby hohlraum experiments on the National Ignition Facility: Comparison with high-flux modeling and the potential for gas-wall interpenetration Amendt, Peter; Ross, J. Steven; Milovich, Jose L. Physics of Plasmas, Vol. 21, Issue 11 https://doi.org/10.1063/1.4901195	journal	November 2014
The first measurements of soft x-ray flux from ignition scale Hohlraums at the National Ignition Facility using DANTE (invited) Kline, J. L.; Widmann, K.; Warrick, A. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3491032	journal	October 2010
Development of Improved Radiation Drive Environment for High Foot Implosions at the National Ignition Facility Hinkel, D. E.; Berzak Hopkins, L. F.; Ma, T. Physical Review Letters, Vol. 117, Issue 22 https://doi.org/10.1103/PhysRevLett.117.225002	journal	November 2016
Point design targets, specifications, and requirements for the 2010 ignition campaign on the National Ignition Facility Haan, S. W.; Lindl, J. D.; Callahan, D. A. Physics of Plasmas, Vol. 18, Issue 5 https://doi.org/10.1063/1.3592169	journal	May 2011
The near vacuum hohlraum campaign at the NIF: A new approach Le Pape, S.; Berzak Hopkins, L. F.; Divol, L. Physics of Plasmas, Vol. 23, Issue 5 https://doi.org/10.1063/1.4950843	journal	May 2016
Dante soft x-ray power diagnostic for National Ignition Facility Dewald, E. L.; Campbell, K. M.; Turner, R. E. Review of Scientific Instruments, Vol. 75, Issue 10 https://doi.org/10.1063/1.1788872	journal	October 2004
Tuning the Implosion Symmetry of ICF Targets via Controlled Crossed-Beam Energy Transfer Michel, P.; Divol, L.; Williams, E. A. Physical Review Letters, Vol. 102, Issue 2 https://doi.org/10.1103/PhysRevLett.102.025004	journal	January 2009
2D X-Ray Radiography of Imploding Capsules at the National Ignition Facility Rygg, J. R.; Jones, O. S.; Field, J. E. Physical Review Letters, Vol. 112, Issue 19 https://doi.org/10.1103/PhysRevLett.112.195001	journal	May 2014
Symmetry control in subscale near-vacuum hohlraums Turnbull, D.; Berzak Hopkins, L. F.; Le Pape, S. Physics of Plasmas, Vol. 23, Issue 5 https://doi.org/10.1063/1.4950825	journal	May 2016
Hydrodynamic instabilities in beryllium targets for the National Ignition Facility Yi, S. A.; Simakov, A. N.; Wilson, D. C. Physics of Plasmas, Vol. 21, Issue 9 https://doi.org/10.1063/1.4894112	journal	September 2014
Development of the indirect‐drive approach to inertial confinement fusion and the target physics basis for ignition and gain Lindl, John Physics of Plasmas, Vol. 2, Issue 11 https://doi.org/10.1063/1.871025	journal	November 1995
The physics basis for ignition using indirect-drive targets on the National Ignition Facility Lindl, John D.; Amendt, Peter; Berger, Richard L. Physics of Plasmas, Vol. 11, Issue 2 https://doi.org/10.1063/1.1578638	journal	February 2004
High-density carbon ablator ignition path with low-density gas-filled rugby hohlraum Amendt, Peter; Ho, Darwin D.; Jones, Ogden S. Physics of Plasmas, Vol. 22, Issue 4 https://doi.org/10.1063/1.4918951	journal	April 2015
Experimental validation of a diagnostic technique for tuning the fourth shock timing on National Ignition Facility Robey, H. F.; Boehly, T. R.; Olson, R. E. Physics of Plasmas, Vol. 17, Issue 1 https://doi.org/10.1063/1.3276154	journal	January 2010
The relationship between gas fill density and hohlraum drive performance at the National Ignition Facility Hall, G. N.; Jones, O. S.; Strozzi, D. J. Physics of Plasmas, Vol. 24, Issue 5 https://doi.org/10.1063/1.4983142	journal	May 2017
The development and advantages of beryllium capsules for the National Ignition Facility Wilson, Douglas C.; Bradley, Paul A.; Hoffman, Nelson M. Physics of Plasmas, Vol. 5, Issue 5 https://doi.org/10.1063/1.872865	journal	May 1998
Near-vacuum hohlraums for driving fusion implosions with high density carbon ablatorsa) Berzak Hopkins, L. F.; Le Pape, S.; Divol, L. Physics of Plasmas, Vol. 22, Issue 5 https://doi.org/10.1063/1.4921151	journal	May 2015
Measurement of 0.1–3‐keV x rays from laser plasmas Kornblum, H. N.; Kauffman, R. L.; Smith, J. A. Review of Scientific Instruments, Vol. 57, Issue 8 https://doi.org/10.1063/1.1138723	journal	August 1986
Three-dimensional HYDRA simulations of National Ignition Facility targets Marinak, M. M.; Kerbel, G. D.; Gentile, N. A. Physics of Plasmas, Vol. 8, Issue 5 https://doi.org/10.1063/1.1356740	journal	May 2001
Novel Characterization of Capsule X-Ray Drive at the National Ignition Facility MacLaren, S. A.; Schneider, M. B.; Widmann, K. Physical Review Letters, Vol. 112, Issue 10 https://doi.org/10.1103/PhysRevLett.112.105003	journal	March 2014

Cited By (5)

Exploring the limits of case-to-capsule ratio, pulse length, and picket energy for symmetric hohlraum drive on the National Ignition Facility Laser Callahan, D. A.; Hurricane, O. A.; Ralph, J. E. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5020057	journal	May 2018
Implosion shape control of high-velocity, large case-to-capsule ratio beryllium ablators at the National Ignition Facility Loomis, E. N.; Yi, S. A.; Kyrala, G. A. Physics of Plasmas, Vol. 25, Issue 7 https://doi.org/10.1063/1.5040995	journal	July 2018
Octahedral spherical Hohlraum for Rev. 6 NIF beryllium capsule Ren, Guoli; Lan, Ke; Chen, Yao-Hua Physics of Plasmas, Vol. 25, Issue 10 https://doi.org/10.1063/1.5041026	journal	October 2018
Beryllium capsule implosions at a case-to-capsule ratio of 3.7 on the National Ignition Facility Zylstra, A. B.; Yi, S. A.; MacLaren, S. Physics of Plasmas, Vol. 25, Issue 10 https://doi.org/10.1063/1.5041285	journal	October 2018
Toward a burning plasma state using diamond ablator inertially confined fusion (ICF) implosions on the National Ignition Facility (NIF) Hopkins, L. Berzak; LePape, S.; Divol, L. Plasma Physics and Controlled Fusion, Vol. 61, Issue 1 https://doi.org/10.1088/1361-6587/aad97e	journal	November 2018

Similar Records

Application of cross-beam energy transfer to control drive symmetry in ICF implosions in low gas fill Hohlraums at the National Ignition Facility

Journal Article · Thu Oct 01 00:00:00 EDT 2020 · Physics of Plasmas · OSTI ID:1357132

Pickworth, L. A.; Döppner, T.; Hinkel, D. E.; +20 more

Achieving record hot spot energies with large HDC implosions on NIF in HYBRID-E

Journal Article · Wed Jul 21 00:00:00 EDT 2021 · Physics of Plasmas · OSTI ID:1357132

Kritcher, A. L.; Zylstra, A. B.; Callahan, D. A.; +55 more

Progress towards a more predictive model for hohlraum radiation drive and symmetry

Journal Article · Fri May 19 00:00:00 EDT 2017 · Physics of Plasmas · OSTI ID:1357132

Jones, O. S.; Suter, L. J.; Scott, H. A.; +11 more

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Hohlraum
X-ray imaging
Radiosurgery
Stimulated Brillouin scattering
Implosion symmetry

Title: Performance of beryllium targets with full-scale capsules in low-fill 6.72-mm hohlraums on the National Ignition Facility

Citation Formats

References (30)

Cited By (5)

Similar Records

Related Subjects