High convergence implosion symmetry in cylindrical hohlraums

Conference · Wed Sep 01 00:00:00 EDT 1999

OSTI ID:14591

Amendt, P A; Bradley, D K; Hammel, B A; Landen, O L; Suter, L J; Turner, R E; Wallace, R J

High convergence, hohlraum-driven implosions will require control of time-integrated drive asymmetries to 1% levels for ignition to succeed on the NIF. We review how core imaging provides such asymmetry measurement accuracy for the lowest order asymmetry modes, and describe recent improvements in imaging techniques that should allow detection of higher order asymmetry modes. We also present a simple analytic model explaining how the sensitivity of symmetry control to beam pointing scales as we progress from single ring per side Nova cylindrical hohlraum illumination geometries to NIF-like multiple rings per side Omega hohlraum illumination geometries and ultimately to NIF-scale hohlraums.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE Office of Defense Programs (DP) (US)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 14591
• Report Number(s): UCRL-JC-135811; DP0210000; DP0210000; TRN: US0106176
• Resource Relation: Conference: First International Conference on Inertial Fusion Sciences and Applications, Bordeaux (FR), 09/12/1999--09/19/1999; Other Information: PBD: 1 Sep 1999
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
US NATIONAL IGNITION FACILITY
ASYMMETRY
CONVERGENCE
IGNITION
IMPLOSIONS
SENSITIVITY ANALYSIS