Physics
Scientific paper
Nov 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..dppuo2001t&link_type=abstract
American Physical Society, 44th Annual Meeting of the Division of Plasma , abstract #UO2.001
Physics
Scientific paper
Ignition on MJ-class ICF facilities requires that drive asymmetries on capsules be reduced below 1-2concept of more beams is better has now been verified reproducibly by contrasting results from several symmetry and implosion campaigns performed on cylindrical hohlraums illuminated with 40 beams arranged in 2 rings per side at Omega versus 10 beams arranged in 1 ring per side at Nova. After normalizing implosion yields to integrated Lasnex code predictions, we claim repeatable primary yields at Omega of 100growth factor, convergence ratio 9 and 16 implosions, a significant improvement over Nova results. The improved symmetry enables us to use experimental data to place meaningful constraints on the modeling of fuel core temperature gradients and pusher-fuel mix. This includes detailed secondary neutron spectra and quantitative measurement of the primary neutron yield reduction caused by the deliberate introduction of Ar into the fuel.
Amendt Peter A.
Dalhed Hollis E.
Glebov Vladimir
Hammel Bruce A.
Landen Otto L.
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