Characterization of direct-drive-implosion core conditions on OMEGA with time-resolved Ar K-shell spectroscopy
Direct-drive-implosion core conditions have been characterized on the 60-beam OMEGA [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] laser system with time-resolved Ar K-shell spectroscopy. Plastic shells with an Ar-doped deuterium fill gas were driven with a 23 kJ, 1 ns square laser pulse smooth...
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| Veröffentlicht in: | Physics of plasmas 2002-04, Vol.9 (4), p.1357-1365 |
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| container_title | Physics of plasmas |
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| creator | Regan, S. P. Delettrez, J. A. Epstein, R. Jaanimagi, P. A. Yaakobi, B. Smalyuk, V. A. Marshall, F. J. Meyerhofer, D. D. Seka, W. Haynes, D. A. Golovkin, I. E. Hooper, C. F. |
| description | Direct-drive-implosion core conditions have been characterized on the 60-beam OMEGA [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] laser system with time-resolved Ar K-shell spectroscopy. Plastic shells with an Ar-doped deuterium fill gas were driven with a 23 kJ, 1 ns square laser pulse smoothed with 1 THz smoothing by spectral dispersion (SSD) and polarization smoothing (PS) using birefringent wedges. The targets are predicted to have a convergence ratio of ∼15. The emissivity-averaged core electron temperature
(T
e
)
and density
(n
e
)
were inferred from the measured time-dependent Ar K-shell spectral line shapes. As the imploding shell decelerates the observed
T
e
and
n
e
increase to 2.0 (±0.2) keV and 2.5
(±0.5)×10
24
cm
−3
at peak neutron production, which is assumed to occur at the time of the peak emissivity-averaged
T
e
.
At peak compression the
n
e
increases to 3.1
(±0.6)×10
24
cm
−3
and the
T
e
decreases to 1.7 (±0.17) keV. The observed core conditions are close to those predicted by a one-dimensional hydrodynamics code. |
| doi_str_mv | 10.1063/1.1456530 |
| format | Article |
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(T
e
)
and density
(n
e
)
were inferred from the measured time-dependent Ar K-shell spectral line shapes. As the imploding shell decelerates the observed
T
e
and
n
e
increase to 2.0 (±0.2) keV and 2.5
(±0.5)×10
24
cm
−3
at peak neutron production, which is assumed to occur at the time of the peak emissivity-averaged
T
e
.
At peak compression the
n
e
increases to 3.1
(±0.6)×10
24
cm
−3
and the
T
e
decreases to 1.7 (±0.17) keV. The observed core conditions are close to those predicted by a one-dimensional hydrodynamics code.</description><identifier>ISSN: 1070-664X</identifier><identifier>EISSN: 1089-7674</identifier><identifier>DOI: 10.1063/1.1456530</identifier><identifier>CODEN: PHPAEN</identifier><language>eng</language><ispartof>Physics of plasmas, 2002-04, Vol.9 (4), p.1357-1365</ispartof><rights>American Institute of Physics</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c212t-bdd56658da4c1570f06ed8e7926cc42ee1adb12704ba41538d6ab05815b827a03</citedby><cites>FETCH-LOGICAL-c212t-bdd56658da4c1570f06ed8e7926cc42ee1adb12704ba41538d6ab05815b827a03</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/pop/article-lookup/doi/10.1063/1.1456530$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>314,776,780,790,1553,4498,27901,27902,76127,76133</link.rule.ids></links><search><creatorcontrib>Regan, S. P.</creatorcontrib><creatorcontrib>Delettrez, J. A.</creatorcontrib><creatorcontrib>Epstein, R.</creatorcontrib><creatorcontrib>Jaanimagi, P. A.</creatorcontrib><creatorcontrib>Yaakobi, B.</creatorcontrib><creatorcontrib>Smalyuk, V. A.</creatorcontrib><creatorcontrib>Marshall, F. J.</creatorcontrib><creatorcontrib>Meyerhofer, D. D.</creatorcontrib><creatorcontrib>Seka, W.</creatorcontrib><creatorcontrib>Haynes, D. A.</creatorcontrib><creatorcontrib>Golovkin, I. E.</creatorcontrib><creatorcontrib>Hooper, C. F.</creatorcontrib><title>Characterization of direct-drive-implosion core conditions on OMEGA with time-resolved Ar K-shell spectroscopy</title><title>Physics of plasmas</title><description>Direct-drive-implosion core conditions have been characterized on the 60-beam OMEGA [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] laser system with time-resolved Ar K-shell spectroscopy. Plastic shells with an Ar-doped deuterium fill gas were driven with a 23 kJ, 1 ns square laser pulse smoothed with 1 THz smoothing by spectral dispersion (SSD) and polarization smoothing (PS) using birefringent wedges. The targets are predicted to have a convergence ratio of ∼15. The emissivity-averaged core electron temperature
(T
e
)
and density
(n
e
)
were inferred from the measured time-dependent Ar K-shell spectral line shapes. As the imploding shell decelerates the observed
T
e
and
n
e
increase to 2.0 (±0.2) keV and 2.5
(±0.5)×10
24
cm
−3
at peak neutron production, which is assumed to occur at the time of the peak emissivity-averaged
T
e
.
At peak compression the
n
e
increases to 3.1
(±0.6)×10
24
cm
−3
and the
T
e
decreases to 1.7 (±0.17) keV. The observed core conditions are close to those predicted by a one-dimensional hydrodynamics code.</description><issn>1070-664X</issn><issn>1089-7674</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><recordid>eNqdkE9LAzEQxYMoWKsHv0GuCqmT3fzZHkupVaz0ouBtySazNLJtlmSp1E_vri149zIzzPx4b3iE3HKYcFD5A59wIZXM4YyMOBRTppUW58OsgSklPi7JVUqfACCULEZkN9-YaGyH0X-bzocdDTV1PqLtmIt-j8xv2yak4WJDxL7snB_ARPvV-nWxnNEv321o57fIIqbQ7NHRWaQvLG2waWhqe7EYkg3t4Zpc1KZJeHPqY_L-uHibP7HVevk8n62YzXjWsco5qfr_nBGWSw01KHQF6mmmrBUZIjeu4pkGURnBZV44ZSqQBZdVkWkD-ZjcHXVtb5wi1mUb_dbEQ8mhHIIqeXkKqmfvj2yyvvvN4H_wPsQ_sGxdnf8AYO54gQ</recordid><startdate>200204</startdate><enddate>200204</enddate><creator>Regan, S. P.</creator><creator>Delettrez, J. A.</creator><creator>Epstein, R.</creator><creator>Jaanimagi, P. A.</creator><creator>Yaakobi, B.</creator><creator>Smalyuk, V. A.</creator><creator>Marshall, F. J.</creator><creator>Meyerhofer, D. D.</creator><creator>Seka, W.</creator><creator>Haynes, D. A.</creator><creator>Golovkin, I. E.</creator><creator>Hooper, C. F.</creator><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>200204</creationdate><title>Characterization of direct-drive-implosion core conditions on OMEGA with time-resolved Ar K-shell spectroscopy</title><author>Regan, S. P. ; Delettrez, J. A. ; Epstein, R. ; Jaanimagi, P. A. ; Yaakobi, B. ; Smalyuk, V. A. ; Marshall, F. J. ; Meyerhofer, D. D. ; Seka, W. ; Haynes, D. A. ; Golovkin, I. E. ; Hooper, C. F.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c212t-bdd56658da4c1570f06ed8e7926cc42ee1adb12704ba41538d6ab05815b827a03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Regan, S. P.</creatorcontrib><creatorcontrib>Delettrez, J. A.</creatorcontrib><creatorcontrib>Epstein, R.</creatorcontrib><creatorcontrib>Jaanimagi, P. A.</creatorcontrib><creatorcontrib>Yaakobi, B.</creatorcontrib><creatorcontrib>Smalyuk, V. A.</creatorcontrib><creatorcontrib>Marshall, F. J.</creatorcontrib><creatorcontrib>Meyerhofer, D. D.</creatorcontrib><creatorcontrib>Seka, W.</creatorcontrib><creatorcontrib>Haynes, D. A.</creatorcontrib><creatorcontrib>Golovkin, I. E.</creatorcontrib><creatorcontrib>Hooper, C. F.</creatorcontrib><collection>CrossRef</collection><jtitle>Physics of plasmas</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Regan, S. P.</au><au>Delettrez, J. A.</au><au>Epstein, R.</au><au>Jaanimagi, P. A.</au><au>Yaakobi, B.</au><au>Smalyuk, V. A.</au><au>Marshall, F. J.</au><au>Meyerhofer, D. D.</au><au>Seka, W.</au><au>Haynes, D. A.</au><au>Golovkin, I. E.</au><au>Hooper, C. F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Characterization of direct-drive-implosion core conditions on OMEGA with time-resolved Ar K-shell spectroscopy</atitle><jtitle>Physics of plasmas</jtitle><date>2002-04</date><risdate>2002</risdate><volume>9</volume><issue>4</issue><spage>1357</spage><epage>1365</epage><pages>1357-1365</pages><issn>1070-664X</issn><eissn>1089-7674</eissn><coden>PHPAEN</coden><abstract>Direct-drive-implosion core conditions have been characterized on the 60-beam OMEGA [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] laser system with time-resolved Ar K-shell spectroscopy. Plastic shells with an Ar-doped deuterium fill gas were driven with a 23 kJ, 1 ns square laser pulse smoothed with 1 THz smoothing by spectral dispersion (SSD) and polarization smoothing (PS) using birefringent wedges. The targets are predicted to have a convergence ratio of ∼15. The emissivity-averaged core electron temperature
(T
e
)
and density
(n
e
)
were inferred from the measured time-dependent Ar K-shell spectral line shapes. As the imploding shell decelerates the observed
T
e
and
n
e
increase to 2.0 (±0.2) keV and 2.5
(±0.5)×10
24
cm
−3
at peak neutron production, which is assumed to occur at the time of the peak emissivity-averaged
T
e
.
At peak compression the
n
e
increases to 3.1
(±0.6)×10
24
cm
−3
and the
T
e
decreases to 1.7 (±0.17) keV. The observed core conditions are close to those predicted by a one-dimensional hydrodynamics code.</abstract><doi>10.1063/1.1456530</doi><tpages>9</tpages></addata></record> |
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| source | AIP Journals Complete; AIP Digital Archive |
| title | Characterization of direct-drive-implosion core conditions on OMEGA with time-resolved Ar K-shell spectroscopy |
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