Bounce coating induced domes on glow discharge polymer coated shells

Plasma polymer coating of larger (1 mm or greater in diameter) Inertial Con finement Fusion (ICF) targets in a piezo electric based bounce pan results in surfaces which contain numerous domes of various sizes for coating thick nesses greater than about 3 mu m. The density of domes increases with the s ize of the shells, number of shells coated at once, the strength of bouncin g, and the coating thickness. The same problem is encountered when bounce c oating large numbers of smaller Nova shells as well. The domes appear to gr ow from seeds produced by chips of the brittle plasma polymer coating itsel f produced in shell-to-shell collisions. A tilted spinning pan has been sho wn to produce smooth dome free coating while providing sufficient agitation to obtain uniform coatings.