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The effect of shock dynamics on compressibility of ignition-scale National Ignition Facility implosions

dc.contributor.authorHicks, D. G.
dc.contributor.authorDewald, E. L.
dc.contributor.authorRobey, H. F.
dc.contributor.authorRygg, J. R.
dc.contributor.authorMeezan, N. B.
dc.contributor.authorFriedrich, S.
dc.contributor.authorBionta, R.
dc.contributor.authorOlson, R.
dc.contributor.authorAtherton, J.
dc.contributor.authorBarrios, M.
dc.contributor.authorBell, P.
dc.contributor.authorBenedetti, R.
dc.contributor.authorBerzak Hopkins, L.
dc.contributor.authorBetti, R.
dc.contributor.authorBradley, D.
dc.contributor.authorCallahan, D.
dc.contributor.authorCasey, D.
dc.contributor.authorCollins, G.
dc.contributor.authorDixit, S.
dc.contributor.authorDöppner, T.
dc.contributor.authorEdgell, D.
dc.contributor.authorEdwards, M. J.
dc.contributor.authorGlenn, S.
dc.contributor.authorGlenzer, S.
dc.contributor.authorGrim, G.
dc.contributor.authorHatchett, S.
dc.contributor.authorJones, O.
dc.contributor.authorKhan, S.
dc.contributor.authorKilkenny, J.
dc.contributor.authorKline, J.
dc.contributor.authorKnauer, J.
dc.contributor.authorKritcher, A.
dc.contributor.authorKyrala, G.
dc.contributor.authorLanden, O.
dc.contributor.authorLePape, S.
dc.contributor.authorLindl, J.
dc.contributor.authorMa, T.
dc.contributor.authorMacphee, A.
dc.contributor.authorMeyerhofer, D.
dc.contributor.authorMoody, J.
dc.contributor.authorMoses, E.
dc.contributor.authorNagel, S. R.
dc.contributor.authorNikroo, A.
dc.contributor.authorPak, A.
dc.contributor.authorParham, T.
dc.contributor.authorPetrasso, R. D.
dc.contributor.authorPrasad, R.
dc.contributor.authorRalph, J.
dc.contributor.authorRoss, J. S.
dc.contributor.authorSangster, T. C.
dc.contributor.authorSepke, S.
dc.contributor.authorSpears, B.
dc.contributor.authorSpringer, P.
dc.contributor.authorTommasini, R.
dc.contributor.authorTown, R.
dc.contributor.authorWeber, S.
dc.contributor.authorWilson, D.
dc.contributor.authorZacharias, R.
dc.date.accessioned2017-09-08T20:03:11Z
dc.date.available2017-09-08T20:03:11Z
dc.date.created2014-11
dc.date.issued2017-09-08
dc.date.submitted2014-07
dc.identifier.issn1070-664X
dc.identifier.issn1089-7674
dc.identifier.urihttp://hdl.handle.net/1721.1/111165
dc.descriptionThe effects of shock dynamics on compressibility of indirect-drive ignition-scale surrogate implosions, CH shells filled with D[superscript 3]He gas, have been studied using charged-particle spectroscopy. Spectral measurements of D[superscript 3]He protons produced at the shock-bang time probe the shock dynamics and in-flight characteristics of an implosion. The proton shock yield is found to vary by over an order of magnitude. A simple model relates the observed yield to incipient hot-spot adiabat, suggesting that implosions with rapid radiation-power increase during the main drive pulse may have a 2× higher hot-spot adiabat, potentially reducing compressibility. A self-consistent 1-D implosion model was used to infer the areal density (ρR) and the shell center-of-mass radius (R[subscript cm]) from the downshift of the shock-produced D[superscript 3]He protons. The observed ρR at shock-bang time is substantially higher for implosions, where the laser drive is on until near the compression bang time (“short-coast”), while longer-coasting implosions have lower ρR. This corresponds to a much larger temporal difference between the shock- and compression-bang time in the long-coast implosions (∼800 ps) than in the short-coast (∼400 ps); this will be verified with a future direct bang-time diagnostic. This model-inferred differential bang time contradicts radiation-hydrodynamic simulations, which predict constant 700–800 ps differential independent of coasting time; this result is potentially explained by uncertainties in modeling late-time ablation drive on the capsule. In an ignition experiment, an earlier shock-bang time resulting in an earlier onset of shell deceleration, potentially reducing compression and, thus, fuel ρR.
dc.description.sponsorshipUnited States. Department of Energy (Grant DE-NA0001857)
dc.description.sponsorshipUnited States. Department of Energy (Grant DE-FC52-08NA28752)
dc.description.sponsorshipNational Laser User’s Facility (DE-NA0002035)
dc.language.isoen_US
dc.publisherAmerican Institute of Physics (AIP)
dc.relation.isversionofhttp://dx.doi.org/10.1063/1.4900621en_US
dc.rightsArticle 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.sourceMIT Plasma Science & Fusion Centeren_US
dc.titleThe effect of shock dynamics on compressibility of ignition-scale National Ignition Facility implosionsen_US
dc.typeArticleen_US
dc.identifier.citationZylstra, A. B. et al. “The Effect of Shock Dynamics on Compressibility of Ignition-Scale National Ignition Facility Implosions.” Physics of Plasmas 21, 11 (November 2014): 112701 © 2014 AIP Publishingen_US
dc.contributor.departmentMassachusetts Institute of Technology. Plasma Science and Fusion Center
dc.contributor.mitauthorZylstra, A. B.
dc.contributor.mitauthorFrenje, J. A.
dc.contributor.mitauthorSeguin, F. H.
dc.contributor.mitauthorRosenberg, M. J.
dc.contributor.mitauthorRinderknecht, H. G.
dc.contributor.mitauthorGatu Johnson, M.
dc.contributor.mitauthorLi, C. K.
dc.contributor.mitauthorManuel, M. J.-E.
dc.contributor.mitauthorSinenian, N.
dc.contributor.mitauthorSio, H. W.
dc.relation.journalPhysics of Plasmasen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsZylstra, A. B.; Frenje, J. A.; Séguin, F. H.; Hicks, D. G.; Dewald, E. L.; Robey, H. F.; Rygg, J. R.; Meezan, N. B.; Rosenberg, M. J.; Rinderknecht, H. G.; Friedrich, S.; Bionta, R.; Olson, R.; Atherton, J.; Barrios, M.; Bell, P.; Benedetti, R.; Berzak Hopkins, L.; Betti, R.; Bradley, D.; Callahan, D.; Casey, D.; Collins, G.; Dixit, S.; Döppner, T.; Edgell, D.; Edwards, M. J.; Gatu Johnson, M.; Glenn, S.; Glenzer, S.; Grim, G.; Hatchett, S.; Jones, O.; Khan, S.; Kilkenny, J.; Kline, J.; Knauer, J.; Kritcher, A.; Kyrala, G.; Landen, O.; LePape, S.; Li, C. K.; Lindl, J.; Ma, T.; Mackinnon, A.; Macphee, A.; Manuel, M. J.-E.; Meyerhofer, D.; Moody, J.; Moses, E.; Nagel, S. R.; Nikroo, A.; Pak, A.; Parham, T.; Petrasso, R. D.; Prasad, R.; Ralph, J.; Rosen, M.; Ross, J. S.; Sangster, T. C.; Sepke, S.; Sinenian, N.; Sio, H. W.; Spears, B.; Springer, P.; Tommasini, R.; Town, R.; Weber, S.; Wilson, D.; Zacharias, R.en_US
dspace.embargo.termsNen_US
mit.licensePUBLISHER_POLICYen_US
mit.metadata.statusComplete


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