Towards a more universal understanding of radiation drive in gas-filled hohlraums

O. S. Jones; C. A. Thomas; P. A. Amendt; G. N. Hall; N. Izumi; M. A. Barrios Garcia; L. F. Berzak Hopkins; H. Chen; E. L. Dewald; D. E. Hinkel; A. L. Kritcher; M. M. Marinak; N. B. Meezan; J. L. Milovich; J. D. Moody; A. S. Moore; M. V. Patel; J. E. Ralph; S. P. Regan; M. D. Rosen; M. B. Schneider; S. M. Sepke; Dj Strozzi; D. P. Turnbull

doi:10.1088/1742-6596/717/1/012026

Towards a more universal understanding of radiation drive in gas-filled hohlraums

O. S. Jones, C. A. Thomas, P. A. Amendt, G. N. Hall, N. Izumi, M. A. Barrios Garcia, L. F. Berzak Hopkins, H. Chen, E. L. Dewald, D. E. Hinkel, A. L. Kritcher, M. M. Marinak, N. B. Meezan, J. L. Milovich, J. D. Moody, A. S. Moore, M. V. Patel, J. E. Ralph, S. P. Regan, M. D. RosenM. B. Schneider, S. M. Sepke, Dj Strozzi, D. P. Turnbull

Research output: Contribution to journal › Conference article › peer-review

21 Scopus citations

Abstract

We have found that radiation-hydrodynamic calculations that use the high flux model assumptions [1] can accurately predict the radiation drive produced by a laser-heated hohlraum under certain conditions, but can not predict drive over a broad range of parameters (pulse energy, hohlraum gas fill density, hohlraum case-to-capsule ratio). In particular, the model is accurate for ∼7 ns long laser pulses used to implode capsules with high density carbon (HDC) ablators in hohlraums with helium fill gas densities of 0-0.6 mg/cc. By systematically varying the gas fill density from 0 to 1.6 mg/cc we found that the agreement with drive begins to diverge for fills > 0.85 mg/cc. This divergence from the model coincides with the onset of measureable SRS backscatter. In this same set of experiments the radiation drive symmetry inferred from the imploded shape of a gas-filled capsule is not predicted with this model. Finally, several possible fixes to the model to reduce the observed discrepancies are considered.

Original language	English (US)
Article number	012026
Journal	Journal of Physics: Conference Series
Volume	717
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/717/1/012026
State	Published - May 26 2016
Externally published	Yes
Event	9th International Conference on Inertial Fusion Sciences and Applications, IFSA 2015 - Seattle, United States Duration: Sep 20 2015 → Sep 25 2015

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

Access to Document

10.1088/1742-6596/717/1/012026

Cite this

Jones, O. S., Thomas, C. A., Amendt, P. A., Hall, G. N., Izumi, N., Barrios Garcia, M. A., Berzak Hopkins, L. F., Chen, H., Dewald, E. L., Hinkel, D. E., Kritcher, A. L., Marinak, M. M., Meezan, N. B., Milovich, J. L., Moody, J. D., Moore, A. S., Patel, M. V., Ralph, J. E., Regan, S. P., ... Turnbull, D. P. (2016). Towards a more universal understanding of radiation drive in gas-filled hohlraums. Journal of Physics: Conference Series, 717(1), Article 012026. https://doi.org/10.1088/1742-6596/717/1/012026

@article{0c95c699a6b04efc95518b6b685c856a,

title = "Towards a more universal understanding of radiation drive in gas-filled hohlraums",

abstract = "We have found that radiation-hydrodynamic calculations that use the high flux model assumptions [1] can accurately predict the radiation drive produced by a laser-heated hohlraum under certain conditions, but can not predict drive over a broad range of parameters (pulse energy, hohlraum gas fill density, hohlraum case-to-capsule ratio). In particular, the model is accurate for ∼7 ns long laser pulses used to implode capsules with high density carbon (HDC) ablators in hohlraums with helium fill gas densities of 0-0.6 mg/cc. By systematically varying the gas fill density from 0 to 1.6 mg/cc we found that the agreement with drive begins to diverge for fills > 0.85 mg/cc. This divergence from the model coincides with the onset of measureable SRS backscatter. In this same set of experiments the radiation drive symmetry inferred from the imploded shape of a gas-filled capsule is not predicted with this model. Finally, several possible fixes to the model to reduce the observed discrepancies are considered.",

author = "Jones, \{O. S.\} and Thomas, \{C. A.\} and Amendt, \{P. A.\} and Hall, \{G. N.\} and N. Izumi and \{Barrios Garcia\}, \{M. A.\} and \{Berzak Hopkins\}, \{L. F.\} and H. Chen and Dewald, \{E. L.\} and Hinkel, \{D. E.\} and Kritcher, \{A. L.\} and Marinak, \{M. M.\} and Meezan, \{N. B.\} and Milovich, \{J. L.\} and Moody, \{J. D.\} and Moore, \{A. S.\} and Patel, \{M. V.\} and Ralph, \{J. E.\} and Regan, \{S. P.\} and Rosen, \{M. D.\} and Schneider, \{M. B.\} and Sepke, \{S. M.\} and Dj Strozzi and Turnbull, \{D. P.\}",

note = "Publisher Copyright: {\textcopyright} Published under licence by IOP Publishing Ltd.; 9th International Conference on Inertial Fusion Sciences and Applications, IFSA 2015 ; Conference date: 20-09-2015 Through 25-09-2015",

year = "2016",

month = may,

day = "26",

doi = "10.1088/1742-6596/717/1/012026",

language = "English (US)",

volume = "717",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing Ltd.",

number = "1",

}

Jones, OS, Thomas, CA, Amendt, PA, Hall, GN, Izumi, N, Barrios Garcia, MA, Berzak Hopkins, LF, Chen, H, Dewald, EL, Hinkel, DE, Kritcher, AL, Marinak, MM, Meezan, NB, Milovich, JL, Moody, JD, Moore, AS, Patel, MV, Ralph, JE, Regan, SP, Rosen, MD, Schneider, MB, Sepke, SM, Strozzi, D & Turnbull, DP 2016, 'Towards a more universal understanding of radiation drive in gas-filled hohlraums', Journal of Physics: Conference Series, vol. 717, no. 1, 012026. https://doi.org/10.1088/1742-6596/717/1/012026

TY - JOUR

T1 - Towards a more universal understanding of radiation drive in gas-filled hohlraums

AU - Jones, O. S.

AU - Thomas, C. A.

AU - Amendt, P. A.

AU - Hall, G. N.

AU - Izumi, N.

AU - Barrios Garcia, M. A.

AU - Berzak Hopkins, L. F.

AU - Chen, H.

AU - Dewald, E. L.

AU - Hinkel, D. E.

AU - Kritcher, A. L.

AU - Marinak, M. M.

AU - Meezan, N. B.

AU - Milovich, J. L.

AU - Moody, J. D.

AU - Moore, A. S.

AU - Patel, M. V.

AU - Ralph, J. E.

AU - Regan, S. P.

AU - Rosen, M. D.

AU - Schneider, M. B.

AU - Sepke, S. M.

AU - Strozzi, Dj

AU - Turnbull, D. P.

PY - 2016/5/26

Y1 - 2016/5/26

N2 - We have found that radiation-hydrodynamic calculations that use the high flux model assumptions [1] can accurately predict the radiation drive produced by a laser-heated hohlraum under certain conditions, but can not predict drive over a broad range of parameters (pulse energy, hohlraum gas fill density, hohlraum case-to-capsule ratio). In particular, the model is accurate for ∼7 ns long laser pulses used to implode capsules with high density carbon (HDC) ablators in hohlraums with helium fill gas densities of 0-0.6 mg/cc. By systematically varying the gas fill density from 0 to 1.6 mg/cc we found that the agreement with drive begins to diverge for fills > 0.85 mg/cc. This divergence from the model coincides with the onset of measureable SRS backscatter. In this same set of experiments the radiation drive symmetry inferred from the imploded shape of a gas-filled capsule is not predicted with this model. Finally, several possible fixes to the model to reduce the observed discrepancies are considered.

AB - We have found that radiation-hydrodynamic calculations that use the high flux model assumptions [1] can accurately predict the radiation drive produced by a laser-heated hohlraum under certain conditions, but can not predict drive over a broad range of parameters (pulse energy, hohlraum gas fill density, hohlraum case-to-capsule ratio). In particular, the model is accurate for ∼7 ns long laser pulses used to implode capsules with high density carbon (HDC) ablators in hohlraums with helium fill gas densities of 0-0.6 mg/cc. By systematically varying the gas fill density from 0 to 1.6 mg/cc we found that the agreement with drive begins to diverge for fills > 0.85 mg/cc. This divergence from the model coincides with the onset of measureable SRS backscatter. In this same set of experiments the radiation drive symmetry inferred from the imploded shape of a gas-filled capsule is not predicted with this model. Finally, several possible fixes to the model to reduce the observed discrepancies are considered.

UR - https://www.scopus.com/pages/publications/84977275842

UR - https://www.scopus.com/inward/citedby.url?scp=84977275842&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/717/1/012026

DO - 10.1088/1742-6596/717/1/012026

M3 - Conference article

AN - SCOPUS:84977275842

SN - 1742-6588

VL - 717

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012026

T2 - 9th International Conference on Inertial Fusion Sciences and Applications, IFSA 2015

Y2 - 20 September 2015 through 25 September 2015

ER -

Towards a more universal understanding of radiation drive in gas-filled hohlraums

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this