Abstract
Significant progress has been made in direct-drive inertial confinement fusion research at the Laboratory for Laser Energetics since the 2009 IFSA Conference [R.L. McCrory et al. , J. Phys.: Conf. Ser. 244 , 012004 (2010)]. Areal densities of 300mg/cm2 have been measured in cryogenic target implosions with neutron yields 15% of 1-D predictions. A model of crossed-beam energy transfer has been developed to explain the observed scattered-light spectrum and laser–target coupling. Experiments show that its impact can be mitigated by changing the ratio of the laser beam to target diameter. Progress continues in the development of the polar-drive concept that will allow direct-drive–ignition experiments to be conducted on the National Ignition Facility using the indirect-drive-beam layout.
Highlights
Significant progress has been made in direct-drive inertial confinement fusion research at the Laboratory for Laser Energetics since the 2009 IFSA Conference [R.L
Progress continues in the development of the polar-drive concept that will allow direct-drive–ignition experiments to be conducted on the National Ignition Facility using the indirect-drive-beam layout
The direct-drive approach to inertial confinement fusion (ICF) [1] provides an attractive alternative to the indirect-drive approach [2] that is currently being pursued on the National Ignition Facility (NIF) [3]
Summary
The direct-drive approach to inertial confinement fusion (ICF) [1] provides an attractive alternative to the indirect-drive approach [2] that is currently being pursued on the National Ignition Facility (NIF) [3]. Direct-drive ICF research is carried out by the Laboratory for Laser Energetics (LLE) using the OMEGA Laser System [4]. Polar drive allows directdrive–ignition experiments [7] to be performed on the NIF [3] using the indirect-drive beam layout, significantly reducing the cost of performing these experiments.
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