THE ELIMINATION OF DEFECTS IN PLASMA POLYMERIZED FILMS USED IN LASER FUSION TARGETS

摘要

The shell surrounding the DT fuel in ablative targets must be relatively thick. Thick glass shells would absorb the argon emissions;this would be a serious handicap in experimental targets since the density diagnostic tells us much about the success of the implosion. A solution to this is to coat thin (0.5 to 2 um) glass shells with low atomic number material to thicknesses of, typically, from 15 to 20 um.nTarget coatings must satisfy a number of special conditions. It must have the same density as glass and must be very smooth and uniform to minimize fluid instabilities that would prevent compression. Also the method for coating must not heat the glass shells enough to cause their DT fuel fill to escape. Plasma polymerization coats the glass shells without overheating the shells and simultaneously permits a wide choice of monomer materials.