Development of high quality polystyrene shell targets

High quality, deuterated polystyrene shell targets ranged from 100 to 1500μm in diameter and 3 to 15μm in wall thickness have been fabricated using a density-matched emulsion method. The sphericity, the wall thickness uniformity, and the surface smoothness were better than 99.8%, 99.3% and less than 0.1μm, respectively. Tritiation of deuterated polystyrene shells were successfully performed by means of an isotope exchange method with UV irradiation. The isotope exchange rate with UV irradiation was 230 times as fast as that without the UV irradiation. These targets showed very good performances in high density compression experiments by GEKKO XII green laser. (author)