Time-resolved absorption in cryogenic and room-temperature

W. Seka; D. H. Edgell; J. P. Knauer; J. F. Myatt; A. V. Maximov; R. W. Short; T. C. Sangster; C. Stoeckl; R. E. Bahr; R. S. Craxton; J. A. Delettrez; V. N. Goncharov; I. V. Igumenshchev; D. Shvarts

doi:10.1063/1.2898405

Time-resolved absorption in cryogenic and room-temperature

W. Seka
, D. H. Edgell
, J. P. Knauer
, J. F. Myatt
, A. V. Maximov
, R. W. Short
, T. C. Sangster
, C. Stoeckl
, R. E. Bahr
, R. S. Craxton
, J. A. Delettrez
, V. N. Goncharov
, I. V. Igumenshchev
, D. Shvarts

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

68 Scopus citations

Abstract

Time-dependent and time-integrated absorption fractions are inferred from scattered-light measurements in room-temperature and cryogenic direct-drive-implosion experiments on OMEGA. The measurements agree reasonably well with hydrodynamic simulations that include nonlocal electron-heat transport. Discrepancies in the time-resolved scattered-light spectra between simulations and experiments remain for complex laser pulse shapes, indicating beam-to-beam energy transfer and commensurate coupling losses. Time-resolved scattered-light spectra near ω2 and 3ω2 as well as time-resolved hard-x-ray measurements indicate the presence of a strongly driven two-plasmon-decay (TPD) instability at high intensities that may influence the observed laser light absorption. Experiments indicate that energetic electron production due to the TPD instability can be mitigated with high- Z -doped plastic shells.

Original language	English
Article number	056312
Journal	Physics of Plasmas
Volume	15
Issue number	5
DOIs	https://doi.org/10.1063/1.2898405
State	Published - 9 Jun 2008

ASJC Scopus subject areas

Condensed Matter Physics

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10.1063/1.2898405

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@article{4fe34b5c7c5e47299e52dfb2e43c6842,

title = "Time-resolved absorption in cryogenic and room-temperature",

abstract = "Time-dependent and time-integrated absorption fractions are inferred from scattered-light measurements in room-temperature and cryogenic direct-drive-implosion experiments on OMEGA. The measurements agree reasonably well with hydrodynamic simulations that include nonlocal electron-heat transport. Discrepancies in the time-resolved scattered-light spectra between simulations and experiments remain for complex laser pulse shapes, indicating beam-to-beam energy transfer and commensurate coupling losses. Time-resolved scattered-light spectra near ω2 and 3ω2 as well as time-resolved hard-x-ray measurements indicate the presence of a strongly driven two-plasmon-decay (TPD) instability at high intensities that may influence the observed laser light absorption. Experiments indicate that energetic electron production due to the TPD instability can be mitigated with high- Z -doped plastic shells.",

author = "W. Seka and Edgell, \{D. H.\} and Knauer, \{J. P.\} and Myatt, \{J. F.\} and Maximov, \{A. V.\} and Short, \{R. W.\} and Sangster, \{T. C.\} and C. Stoeckl and Bahr, \{R. E.\} and Craxton, \{R. S.\} and Delettrez, \{J. A.\} and Goncharov, \{V. N.\} and Igumenshchev, \{I. V.\} and D. Shvarts",

note = "Funding Information: This work was supported by the U.S. Department of Energy Office of Inertial Confinement Fusion under Cooperative Agreement No. DE-FC52-08NA28302 and the University of Rochester. The support of DOE does not constitute an endorsement by DOE of the views expressed in this article.",

year = "2008",

month = jun,

day = "9",

doi = "10.1063/1.2898405",

language = "English",

volume = "15",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics",

number = "5",

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TY - JOUR

T1 - Time-resolved absorption in cryogenic and room-temperature

AU - Seka, W.

AU - Edgell, D. H.

AU - Knauer, J. P.

AU - Myatt, J. F.

AU - Maximov, A. V.

AU - Short, R. W.

AU - Sangster, T. C.

AU - Stoeckl, C.

AU - Bahr, R. E.

AU - Craxton, R. S.

AU - Delettrez, J. A.

AU - Goncharov, V. N.

AU - Igumenshchev, I. V.

AU - Shvarts, D.

N1 - Funding Information: This work was supported by the U.S. Department of Energy Office of Inertial Confinement Fusion under Cooperative Agreement No. DE-FC52-08NA28302 and the University of Rochester. The support of DOE does not constitute an endorsement by DOE of the views expressed in this article.

PY - 2008/6/9

Y1 - 2008/6/9

N2 - Time-dependent and time-integrated absorption fractions are inferred from scattered-light measurements in room-temperature and cryogenic direct-drive-implosion experiments on OMEGA. The measurements agree reasonably well with hydrodynamic simulations that include nonlocal electron-heat transport. Discrepancies in the time-resolved scattered-light spectra between simulations and experiments remain for complex laser pulse shapes, indicating beam-to-beam energy transfer and commensurate coupling losses. Time-resolved scattered-light spectra near ω2 and 3ω2 as well as time-resolved hard-x-ray measurements indicate the presence of a strongly driven two-plasmon-decay (TPD) instability at high intensities that may influence the observed laser light absorption. Experiments indicate that energetic electron production due to the TPD instability can be mitigated with high- Z -doped plastic shells.

AB - Time-dependent and time-integrated absorption fractions are inferred from scattered-light measurements in room-temperature and cryogenic direct-drive-implosion experiments on OMEGA. The measurements agree reasonably well with hydrodynamic simulations that include nonlocal electron-heat transport. Discrepancies in the time-resolved scattered-light spectra between simulations and experiments remain for complex laser pulse shapes, indicating beam-to-beam energy transfer and commensurate coupling losses. Time-resolved scattered-light spectra near ω2 and 3ω2 as well as time-resolved hard-x-ray measurements indicate the presence of a strongly driven two-plasmon-decay (TPD) instability at high intensities that may influence the observed laser light absorption. Experiments indicate that energetic electron production due to the TPD instability can be mitigated with high- Z -doped plastic shells.

UR - https://www.scopus.com/pages/publications/44649203324

U2 - 10.1063/1.2898405

DO - 10.1063/1.2898405

M3 - Article

AN - SCOPUS:44649203324

SN - 1070-664X

VL - 15

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5

M1 - 056312

ER -

Time-resolved absorption in cryogenic and room-temperature

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