Experiments on the interaction of intense femtosecond radiation with dense plasmas. Final report

摘要

An upgraded KrF(sup (asterisk)) (248 nm) system producing a pulse energy of (approximately) 400 mJ, a pulse width of (approximately) 220 fs, and focal intensities above 10(sup 19) W/cm(sup 2), has been constructed, tested, operated, and used in experimental studies. The spatial morphology of channeled radiation in plasmas has been measured with a spatial resolution of (approximately) 30 (mu)m and damage studies of fused silica indicate that femtosecond (200 - 300 fs) 248 nm radiation has a damage limit not exceeding (approximately) 50 GW/cm(sup 2), an unfavorably low level. 2 figs.