Systematic analysis of direct-drive baseline designs for shock ignition with the Laser MégaJoule

We present direct-drive target design studies for the laser megajoule using two distinct initial aspect ratios (A = 34 and A = 5). Laser pulse shapes are optimized by a random walk method and drive power variations are used to cover a wide variety of implosion velocities between 260 km/s and 365 km/...

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Bibliographic Details
Published in:EPJ Web of conferences 2013-01, Vol.59, p.3004-np
Main Authors: Brandon, V., Canaud, B., Laffite, S., Temporal, M., Ramis, R.
Format: Article
Language:English
Subjects:
Aspect ratio
Design engineering
Ignition
Implosions
Lasers
Pulse shape
Random walk
Thresholds
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Summary:We present direct-drive target design studies for the laser megajoule using two distinct initial aspect ratios (A = 34 and A = 5). Laser pulse shapes are optimized by a random walk method and drive power variations are used to cover a wide variety of implosion velocities between 260 km/s and 365 km/s. For selected implosion velocities and for each initial aspect ratio, scaled-target families are built in order to find self-ignition threshold. High-gain shock ignition is also investigated in the context of Laser MegaJoule for marginally igniting targets below their own self-ignition threshold.
ISSN:2100-014X
2100-014X
DOI:10.1051/epjconf/20135903004