Defect Implosion Experiments (DIME) at OMEGA

The Los Alamos DIME campaign involves perturbed spherical implosions, driven by 60 OMEGA beams with uniform, symmetrical illumination. D-T-filled CH-shell targets with equatorial-plane defects are designed to produce a non-spherical neutron burn region. The objectives of the DIME series are to observe the non-spherical burn with the neutron imaging system (NIS) and to simulate the physics of the neutron and x-ray production. We have demonstrated adequate neutron yield for NIS imaging with targets of diameter 860 $\mu $m. All targets are filled with 5 atm of DT. We used two separate shell thicknesses: 8 $\mu $m and 15 $\mu $m, thus testing both exploding pusher and ablative designs. Defect channel depth ranges from 0 -- 8 $\mu $m. Width is 20 -- 40 $\mu $m. Perfect targets have no defect. Numerical simulations predict enhanced x-ray emission, that is suggested by experiment. Results from a recent DIME campaign will be discussed.