Petawatt laser system

Details Petawatt laser system Petawatt laser system

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.3047..490p&link_type=abstract

Proc. SPIE Vol. 3047, p. 490-500, Solid State Lasers for Application to Inertial Confinement Fusion: Second Annual International

Physics

7

Scientific paper

We recently demonstrated the production of over a petawatt of peak power in the Nova/Petawatt Laser Facility, generating > 600 J in approximately 440 fs. The Petawatt Laser Project was initiated to develop the capability to test the fast ignitor concept for inertial confinement fusion, and to provide a unique capability in high energy density physics. The laser was designed to produce near kJ pulses with a pulse duration adjustable between 0.5 and 20 ps. At the shortest pulse lengths, this laser is expected to surpass 1021 W/cm2 when focused later this year. Currently, this system is limited to 600 J pulses in a 46.3- cm beam. Expansion of the beam to 58 cm, with the installation of 94-cm gratings, will enable 1 kJ operation. Target experiments with petawatt pulses will be possible either integrated with Nova in the 10 beam target chamber or as a stand alone system in an independent, dedicated chamber. Focusing the beam onto a target will be accomplished using an on axis parabolic mirror. The design of a novel targeting system enabling the production of ultrahigh contrast pulses and an easily variable effective focal length is also described.

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