Performance of direct-drive cryogenic targets on OMEGA

V. N. Goncharov, T. C. Sangster, P. B. Radha, R. Betti, T. R. Boehly, T. J.B. Collins, R. S. Craxton, J. A. Delettrez, R. Epstein, V. Yu Glebov, S. X. Hu, I. V. Igumenshchev, J. P. Knauer, S. J. Loucks, J. A. Marozas, F. J. Marshall, R. L. McCrory, P. W. McKenty, D. D. Meyerhofer, S. P. ReganW. Seka, S. Skupsky, V. A. Smalyuk, J. M. Soures, C. Stoeckl, D. Shvarts, J. A. Frenje, R. D. Petrasso, C. K. Li, F. Seguin, W. Manheimer, D. G. Colombant

Research output: Contribution to journalArticlepeer-review

85 Scopus citations

Abstract

The success of direct-drive-ignition target designs depends on two issues: the ability to maintain the main fuel adiabat at a low level and the control of the nonuniformity growth during the implosion. A series of experiments was performed on the OMEGA Laser System [T. R. Boehly, D. L. Brown, R. S. Craxton, Opt. Commun. 133, 495 (1997)] to study the physics of low-adiabat, high-compression cryogenic fuel assembly. Modeling these experiments requires an accurate account for all sources of shell heating, including shock heating and suprathermal electron preheat. To increase calculation accuracy, a nonlocal heat-transport model was implemented in the 1D hydrocode. High-areal-density cryogenic fuel assembly with ρ R200 mg cm2 [T. C. Sangster, V. N. Goncharov, P. B. Radha, "High-areal-density fuel assembly in direct-drive cryogenic implosions," Phys. Rev. Lett. (submitted)] has been achieved on OMEGA in designs where the shock timing was optimized using the nonlocal treatment of the heat conduction and the suprathermal-electron preheat generated by the two-plasmon-decay instability was mitigated.

Original languageEnglish
Article number056310
JournalPhysics of Plasmas
Volume15
Issue number5
DOIs
StatePublished - 9 Jun 2008
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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