8 research outputs found
High-performance OPCPA laser system
A high-performance optical parametric chirped-pulse
amplifier (OPCPA) system has been demonstrated as a prototype for the front
end of the OMEGA Extended Performance (EP) Laser System
High-intensity laser diagnostics for OMEGA EP
OMEGA EP is a new high-energy petawatt laser system under
construction at the University of Rochester's Laboratory for Laser
Energetics. This paper describes our designs for two diagnostics critical to
OMEGA EP's mission. The focal-spot diagnostic (FSD) is responsible for
characterizing the focal spot of OMEGA EP's off-axis parabolic mirror at
full energy. The ultrafast temporal diagnostic (UTD) is responsible for
characterizing pulse shapes of full-energy target shots ranging in width
from 1 to 100 ps as well as setting the desired pulse width before the
shot. These diagnostics will enable, for the first time, complete spatial
and temporal characterization of the focus of a high-energy petawatt laser
at full energy
Preparing for polar-drive ignition on the National Ignition Facility
The implementation of polar drive (PD) at the National Ignition Facility (NIF) will enable the execution of direct-drive implosions while the facility is configured for x-ray drive. The Laboratory for Laser Energetics (LLE), in collaboration with LLNL, LANL and GA, is implementing PD on the NIF. LLE has designed and participates in the use of PD implosions for diagnostic commissioning on the NIF. LLE has an active experimental campaign to develop PD in both warm and cryogenic target experiments on OMEGA. LLE and its partners are developing a Polar Drive Project Execution Plan, which will provide a detailed outline of the requirements, resources, and timetable leading to PD-ignition experiments on the NIF
Preparing for polar-drive ignition on the National Ignition Facility
The implementation of polar drive (PD) at the National Ignition Facility (NIF) will enable the execution of direct-drive implosions while the facility is configured for x-ray drive. The Laboratory for Laser Energetics (LLE), in collaboration with LLNL, LANL and GA, is implementing PD on the NIF. LLE has designed and participates in the use of PD implosions for diagnostic commissioning on the NIF. LLE has an active experimental campaign to develop PD in both warm and cryogenic target experiments on OMEGA. LLE and its partners are developing a Polar Drive Project Execution Plan, which will provide a detailed outline of the requirements, resources, and timetable leading to PD-ignition experiments on the NIF
OMEGA EP: High-energy petawatt capability for the OMEGA laser facility
OMEGA EP (Extended Performance) is a petawatt-class
addition to the existing 30-kJ,
60-beam OMEGA Laser Facility at the University of Rochester. When completed,
it will consist of four beamlines, each capable of producing up to 6.5 kJ at
351 nm in a 1 to 10 ns pulse. Two of the beamlines will produce up to 2.6 kJ
in a pulse-width range of 1 to 100 ps at 1053 nm using chirped-pulse
amplification (CPA). This paper reviews both the OMEGA EP performance
objectives and the enabling technologies required to meet these goals
Progress in direct-drive inertial confinement fusion research at the laboratory for laser energetics
Direct-drive inertial confinement fusion (ICF) is
expected to demonstrate high gain on the National Ignition Facility (NIF) in
the next decade and is a leading candidate for inertial fusion energy
production. The demonstration of high areal densities in hydrodynamically
scaled cryogenic DT or D implosions with neutron yields that are a
significant fraction of the “clean” 1-D predictions will validate the
ignition-equivalent direct-drive target performance on the OMEGA laser at
the Laboratory for Laser Energetics (LLE). This paper highlights some
of the recent experimental and theoretical progress toward this validation.
The NIF will initially be configured for x-ray drive and with no beams
placed at the target equator to provide a symmetric irradiation of a
direct-drive capsule. LLE is developing the “polar-direct-drive” (PDD)
approach that repoints beams toward the target equator. Initial 2-D
simulations have shown ignition. 
LLE is currently constructing the multibeam, 2.6-kJ/beam, petawatt laser
system OMEGA EP. Integrated fast-ignition experiments, combining the OMEGA
EP and OMEGA laser systems, will begin in FY08
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Direct-Drive Inertial Fusion Research at the University of Rochester's Laboratory for Laser Energetics: A Review
This paper reviews the status of direct-drive inertial confinement fusion (ICF) research at the University of Rochester's Laboratory for Laser Energetics (LLE). LLE's goal is to demonstrate direct-drive ignition on the National Ignition Facility (NIF) by 2014. Baseline "all-DT" NIF direct-drive ignition target designs have been developed that have a predicted gain of 45 (1-D) at a NIF drive energy of ~1.6 MJ. Significantly higher gains are calculated for targets that include a DT-wicked foam ablator. This paper also reviews the results of both warm fuel and initial cryogenic-fuel spherical target implosion experiments carried out on the OMEGA UV laser. The results of these experiments and design calculations increase confidence that the NIF direct-drive ICF ignition goal will be achieved