dc.contributor.author | Rygg, J. R. | |
dc.contributor.author | Kritcher, A. | |
dc.contributor.author | Hicks, D. G. | |
dc.contributor.author | Friedrich, S. | |
dc.contributor.author | Bionta, R. | |
dc.contributor.author | Meezan, N. B. | |
dc.contributor.author | Olson, R. | |
dc.contributor.author | Atherton, J. | |
dc.contributor.author | Barrios, M. | |
dc.contributor.author | Bell, P. | |
dc.contributor.author | Benedetti, R. | |
dc.contributor.author | Berzak Hopkins, L. | |
dc.contributor.author | Betti, R. | |
dc.contributor.author | Bradley, D. | |
dc.contributor.author | Callahan, D. | |
dc.contributor.author | Casey, D. | |
dc.contributor.author | Collins, G. | |
dc.contributor.author | Dewald, E. L. | |
dc.contributor.author | Dixit, S. | |
dc.contributor.author | Döppner, T. | |
dc.contributor.author | Edwards, M. J. | |
dc.contributor.author | Glenn, S. | |
dc.contributor.author | Grim, G. | |
dc.contributor.author | Hatchett, S. | |
dc.contributor.author | Jones, O. | |
dc.contributor.author | Khan, S. | |
dc.contributor.author | Kilkenny, J. | |
dc.contributor.author | Kline, J. | |
dc.contributor.author | Knauer, J. | |
dc.contributor.author | Kyrala, G. | |
dc.contributor.author | Landen, O. | |
dc.contributor.author | LePape, S. | |
dc.contributor.author | Lindl, J. | |
dc.contributor.author | Ma, T. | |
dc.contributor.author | Mackinnon, A. | |
dc.contributor.author | Meyerhofer, D. | |
dc.contributor.author | Moses, E. | |
dc.contributor.author | Nagel, S. R. | |
dc.contributor.author | Nikroo, A. | |
dc.contributor.author | Parham, T. | |
dc.contributor.author | Pak, A. | |
dc.contributor.author | Prasad, R. | |
dc.contributor.author | Ralph, J. | |
dc.contributor.author | Robey, H. F. | |
dc.contributor.author | Ross, J. S. | |
dc.contributor.author | Sangster, T. C. | |
dc.contributor.author | Sepke, S. | |
dc.contributor.author | Spears, B. | |
dc.contributor.author | Tommasini, R. | |
dc.contributor.author | Town, R. | |
dc.contributor.author | Weber, S. | |
dc.contributor.author | Wilson, D. | |
dc.contributor.author | Yeamans, C. | |
dc.contributor.author | Zacharias, R. | |
dc.contributor.author | Zylstra, Alex Bennett | |
dc.contributor.author | Frenje, Johan A | |
dc.contributor.author | Seguin, Fredrick Hampton | |
dc.contributor.author | Rosenberg, Michael Jonathan | |
dc.contributor.author | Rinderknecht, Hans George | |
dc.contributor.author | Gatu Johnson, Maria | |
dc.contributor.author | Li, C. K. | |
dc.contributor.author | Manuel, Mario J.-E | |
dc.contributor.author | Petrasso, Richard D | |
dc.contributor.author | Sinenian, Nareg | |
dc.contributor.author | Sio, Hong Weng | |
dc.date.accessioned | 2017-09-12T14:32:48Z | |
dc.date.available | 2017-09-12T14:32:48Z | |
dc.date.issued | 2015-04 | |
dc.date.submitted | 2014-11 | |
dc.identifier.issn | 1070-664X | |
dc.identifier.issn | 1089-7674 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/111174 | |
dc.description.abstract | Charged-particle spectroscopy is used to assess implosion symmetry in ignition-scale indirect-drive implosions for the first time. Surrogate D³He gas-filled implosions at the National Ignition Facility produce energetic protons via D+³He fusion that are used to measure the implosion areal density (ρR) at the shock-bang time. By using protons produced several hundred ps before the main compression bang, the implosion is diagnosed in-flight at a convergence ratio of 3–5 just prior to peak velocity. This isolates acceleration-phase asymmetry growth. For many surrogate implosions, proton spectrometers placed at the north pole and equator reveal significant asymmetries with amplitudes routinely ≳10%, which are interpreted as ℓ=2 Legendre modes. With significant expected growth by stagnation, it is likely that these asymmetries would degrade the final implosion performance. X-ray self-emission images at stagnation show asymmetries that are positively correlated with the observed in-flight asymmetries and comparable in magnitude, contradicting growth models; this suggests that the hot-spot shape does not reflect the stagnated shell shape or that significant residual kinetic energy exists at stagnation. More prolate implosions are observed when the laser drive is sustained (“no-coast”), implying a significant time-dependent asymmetry in peak drive. | en_US |
dc.description.sponsorship | United States. Department of Energy (Grant DE-NA0001857) | en_US |
dc.description.sponsorship | United States. Department of Energy (Grant DE-FC52-08NA28752) | en_US |
dc.language.iso | en_US | |
dc.publisher | American Institute of Physics (AIP) | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1063/1.4918355 | en_US |
dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
dc.source | MIT Plasma Science & Fusion Center | en_US |
dc.title | In-flight observations of low-mode ρR asymmetries in NIF implosions | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Zylstra, A. B. et al. “In-Flight Observations of Low-Mode ρR Asymmetries in NIF Implosions.” Physics of Plasmas 22, 5 (May 2015): 056301 © 2015 AIP Publishing | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Plasma Science and Fusion Center | en_US |
dc.contributor.mitauthor | Zylstra, Alex Bennett | |
dc.contributor.mitauthor | Frenje, Johan A | |
dc.contributor.mitauthor | Seguin, Fredrick Hampton | |
dc.contributor.mitauthor | Rosenberg, Michael Jonathan | |
dc.contributor.mitauthor | Rinderknecht, Hans George | |
dc.contributor.mitauthor | Gatu Johnson, Maria | |
dc.contributor.mitauthor | Li, C. K. | |
dc.contributor.mitauthor | Manuel, Mario J.-E | |
dc.contributor.mitauthor | Petrasso, Richard D | |
dc.contributor.mitauthor | Sinenian, Nareg | |
dc.contributor.mitauthor | Sio, Hong Weng | |
dc.relation.journal | Physics of Plasmas | en_US |
dc.eprint.version | Author's final manuscript | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Zylstra, A. B.; Frenje, J. A.; Séguin, F. H.; Rygg, J. R.; Kritcher, A.; Rosenberg, M. J.; Rinderknecht, H. G.; Hicks, D. G.; Friedrich, S.; Bionta, R.; Meezan, N. B.; Olson, R.; Atherton, J.; Barrios, M.; Bell, P.; Benedetti, R.; Berzak Hopkins, L.; Betti, R.; Bradley, D.; Callahan, D.; Casey, D.; Collins, G.; Dewald, E. L.; Dixit, S.; Döppner, T.; Edwards, M. J.; Gatu Johnson, M.; Glenn, S.; Grim, G.; Hatchett, S.; Jones, O.; Khan, S.; Kilkenny, J.; Kline, J.; Knauer, J.; Kyrala, G.; Landen, O.; LePape, S.; Li, C. K.; Lindl, J.; Ma, T.; Mackinnon, A.; Manuel, M. J.-E.; Meyerhofer, D.; Moses, E.; Nagel, S. R.; Nikroo, A.; Parham, T.; Pak, A.; Petrasso, R. D.; Prasad, R.; Ralph, J.; Robey, H. F.; Ross, J. S.; Sangster, T. C.; Sepke, S.; Sinenian, N.; Sio, H. W.; Spears, B.; Tommasini, R.; Town, R.; Weber, S.; Wilson, D.; Yeamans, C.; Zacharias, R. | en_US |
dspace.embargo.terms | N | en_US |
dc.identifier.orcid | https://orcid.org/0000-0003-0489-7479 | |
dc.identifier.orcid | https://orcid.org/0000-0003-4969-5571 | |
dc.identifier.orcid | https://orcid.org/0000-0002-1020-3501 | |
dc.identifier.orcid | https://orcid.org/0000-0001-7274-236X | |
mit.license | PUBLISHER_POLICY | en_US |