MONOCHROMATIC PENUMBRAL IMAGING DIAGNOSTIC DEVELOPMENT FOR ARGON FILLED MICROBALLOON IMPLODED BY POWERFUL LASER

Inertial-confinement fusion targets filled with argon are widely used to diagnose the compressed core in implosion experiments. Shape analys is of the compressed core by imaging technique can be very interesting especially to determine the effect of the irradiation symmetry on the implosion performance, For this purpose, we are developing a monochro matic imaging diagnostic ARGONIX which uses a flat multilayer mirror i n order to select the required monochromatic energy and a coded apertu re in order to increase the overall sensitivity. This diagnostic has b een tested on Phebus in indirect drive mode by imploding glass microba lloons filled with only a DT mixture and plastic microballoons filled with pure argon, Penumbral images of silicon background emission from the pusher and argon monochromatic annular coded image of argon He-bet a line will be presented together with their unfolded images.