Proton Radiography of Polar-Drive Implosions on OMEGA

Low-adiabat, polar-drive-implosion experiments performed on OMEGA are diagnosed for the first time with high-energy protons generated by the OMEGA EP laser. Warm D$_{2}$-gas--filled CH capsules are imploded with shaped laser pulses, keeping the main fuel layer on a low adiabat. The high-energy protons are used to radiograph the targets, with the goal of providing time-resolved two-dimensional images of the converging shell. The inferred shell shape and symmetry will be compared to those determined by x-ray radiography and radiation hydrodynamics modeling. This work was supported by the U.S. Department of Energy Office of Inertial Confinement Fusion under Cooperative Agreement No. DE-FC52-08NA28302.