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Use of external magnetic fields in hohlraum plasmas to improve laser-coupling
Efficient coupling of laser energy into hohlraum targets is important for indirect drive ignition. Laser-plasma instabilities can reduce coupling, reduce symmetry, and cause preheat. We consider the effects of an external magnetic field on laser-energy coupling in hohlraum targets. Experiments were...
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| Published in: | Physics of plasmas 2015-01, Vol.22 (1) |
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| Main Authors: | , , , , , , , , , , , |
| Format: | Article |
| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-c385t-36f6eca5428f143f6941a5117f745211411e7913dc58eeff616ec9540587aa53 |
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| cites | cdi_FETCH-LOGICAL-c385t-36f6eca5428f143f6941a5117f745211411e7913dc58eeff616ec9540587aa53 |
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| container_issue | 1 |
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| container_title | Physics of plasmas |
| container_volume | 22 |
| creator | Montgomery, D. S. Albright, B. J. Barnak, D. H. Chang, P. Y. Davies, J. R. Fiksel, G. Froula, D. H. Kline, J. L. MacDonald, M. J. Sefkow, A. B. Yin, L. Betti, R. |
| description | Efficient coupling of laser energy into hohlraum targets is important for indirect drive ignition. Laser-plasma instabilities can reduce coupling, reduce symmetry, and cause preheat. We consider the effects of an external magnetic field on laser-energy coupling in hohlraum targets. Experiments were performed at the Omega Laser Facility using low-Z gas-filled hohlraum targets which were placed in a magnetic coil with Bz ≤ 7.5-T. We found that an external field Bz = 7.5-T aligned along the hohlraum axis results in up to a 50% increase in plasma temperature as measured by Thomson scattering. The experiments were modeled using the 2-D magnetohydrodynamics package in HYDRA and were found to be in good agreement. |
| doi_str_mv | 10.1063/1.4906055 |
| format | article |
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S. ; Albright, B. J. ; Barnak, D. H. ; Chang, P. Y. ; Davies, J. R. ; Fiksel, G. ; Froula, D. H. ; Kline, J. L. ; MacDonald, M. J. ; Sefkow, A. B. ; Yin, L. ; Betti, R.</creator><creatorcontrib>Montgomery, D. S. ; Albright, B. J. ; Barnak, D. H. ; Chang, P. Y. ; Davies, J. R. ; Fiksel, G. ; Froula, D. H. ; Kline, J. L. ; MacDonald, M. J. ; Sefkow, A. B. ; Yin, L. ; Betti, R.</creatorcontrib><description>Efficient coupling of laser energy into hohlraum targets is important for indirect drive ignition. Laser-plasma instabilities can reduce coupling, reduce symmetry, and cause preheat. We consider the effects of an external magnetic field on laser-energy coupling in hohlraum targets. Experiments were performed at the Omega Laser Facility using low-Z gas-filled hohlraum targets which were placed in a magnetic coil with Bz ≤ 7.5-T. We found that an external field Bz = 7.5-T aligned along the hohlraum axis results in up to a 50% increase in plasma temperature as measured by Thomson scattering. 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S.</creatorcontrib><creatorcontrib>Albright, B. J.</creatorcontrib><creatorcontrib>Barnak, D. H.</creatorcontrib><creatorcontrib>Chang, P. Y.</creatorcontrib><creatorcontrib>Davies, J. R.</creatorcontrib><creatorcontrib>Fiksel, G.</creatorcontrib><creatorcontrib>Froula, D. H.</creatorcontrib><creatorcontrib>Kline, J. L.</creatorcontrib><creatorcontrib>MacDonald, M. J.</creatorcontrib><creatorcontrib>Sefkow, A. B.</creatorcontrib><creatorcontrib>Yin, L.</creatorcontrib><creatorcontrib>Betti, R.</creatorcontrib><title>Use of external magnetic fields in hohlraum plasmas to improve laser-coupling</title><title>Physics of plasmas</title><description>Efficient coupling of laser energy into hohlraum targets is important for indirect drive ignition. Laser-plasma instabilities can reduce coupling, reduce symmetry, and cause preheat. We consider the effects of an external magnetic field on laser-energy coupling in hohlraum targets. Experiments were performed at the Omega Laser Facility using low-Z gas-filled hohlraum targets which were placed in a magnetic coil with Bz ≤ 7.5-T. We found that an external field Bz = 7.5-T aligned along the hohlraum axis results in up to a 50% increase in plasma temperature as measured by Thomson scattering. The experiments were modeled using the 2-D magnetohydrodynamics package in HYDRA and were found to be in good agreement.</description><subject>Computational fluid dynamics</subject><subject>Coupling</subject><subject>Lasers</subject><subject>Magnetic coils</subject><subject>Magnetic fields</subject><subject>Magnetohydrodynamics</subject><subject>Plasma</subject><subject>Plasma temperature</subject><subject>Plasmas</subject><subject>Thomson scattering</subject><subject>Two dimensional models</subject><issn>1070-664X</issn><issn>1089-7674</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNotkEtLAzEUhYMoWKsL_0HQlYupuZPXzFKKL6i4qeAuhPSmnTIzGZNU9N87Q13dw-XjcM4h5BrYApji97AQNVNMyhMyA1bVhVZanE5as0Ip8XlOLlLaM8aEktWMvH0kpMFT_MkYe9vSzm57zI2jvsF2k2jT013YtdEeOjq0NnU20Rxo0w0xfCMdPxgLFw5D2_TbS3LmbZvw6v_Oyfrpcb18KVbvz6_Lh1XheCVzwZVX6KwUZeVBcK9qAVYCaK-FLAEEAOoa-MbJCtF7BSNeS8Fkpa2VfE5ujrYh5cYk12R0Oxf6Hl02MBpoVY3Q7REag34dMGWzD4epYjIllFzXitUTdXekXAwpRfRmiE1n468BZqZFDZj_RfkfSa9mgA</recordid><startdate>20150101</startdate><enddate>20150101</enddate><creator>Montgomery, D. 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B.</au><au>Yin, L.</au><au>Betti, R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Use of external magnetic fields in hohlraum plasmas to improve laser-coupling</atitle><jtitle>Physics of plasmas</jtitle><date>2015-01-01</date><risdate>2015</risdate><volume>22</volume><issue>1</issue><issn>1070-664X</issn><eissn>1089-7674</eissn><abstract>Efficient coupling of laser energy into hohlraum targets is important for indirect drive ignition. Laser-plasma instabilities can reduce coupling, reduce symmetry, and cause preheat. We consider the effects of an external magnetic field on laser-energy coupling in hohlraum targets. Experiments were performed at the Omega Laser Facility using low-Z gas-filled hohlraum targets which were placed in a magnetic coil with Bz ≤ 7.5-T. We found that an external field Bz = 7.5-T aligned along the hohlraum axis results in up to a 50% increase in plasma temperature as measured by Thomson scattering. 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| ispartof | Physics of plasmas, 2015-01, Vol.22 (1) |
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| source | American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list); AIP_美国物理联合会现刊（与NSTL共建） |
| subjects | Computational fluid dynamics Coupling Lasers Magnetic coils Magnetic fields Magnetohydrodynamics Plasma Plasma temperature Plasmas Thomson scattering Two dimensional models |
| title | Use of external magnetic fields in hohlraum plasmas to improve laser-coupling |
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