Sophisticated target design/fab compensates for limitations in drivers
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Transcript of Sophisticated target design/fab compensates for limitations in drivers
The new NIF ignition design relies on sophisticated 3D codes and targets, to give a confidence in ignition at 1 MJ
Sophisticated target design/fab compensates for limitations in drivers
Symmetric direct drive ignition on the NIF requires major changes to the facility
Polar Direct Drive( PDD) achieves direct drive ignition with NIF’s beams in the Indirect Drive configuration
direct drive
Direct drive: Rochester, NRL and the Laboratories
• Non symmetric laser illumination PDD is being explored
• Aggressive pulse shaping increases the margin for ignition
• Target designs which push our understanding offer hope for ignition at substantially lower laser energy-NRL Vin~ 5 107 ignition at ~ 200kJ
Aggressive 2D designs are being validated experimentally
direct drive
The three high yield concepts being explored on Z involve aggressive physics which will have pay off for all x-ray drive platforms
Pulse power
Target fabrication R & D can further enhance the margin for ignition
Advances in x-ray drive could reduce the lost energy or more effectively use the 4 MJ of laser energy potentially available from NIF
The small capsule to case ratio results in low energy coupling- advanced symmetry control could allow less hohlraum loss
More energy on NIF is available with green and even 1 micron
advanced x-ray drive
Shimmed targets tolerate smaller case/capsule with increased efficiency of x-ray drive
advanced x-ray drive