Results of Pulse-Scaling Experiments on Rapid-Growth DKDP Triplers Using the Optical Sciences Laser at 351 nm.

[摘要] Results are reported from recently performed bulk-damage, pulse-scaling experiments on DKDP tripler samples taken from NIF-size, rapid-growth boule BD7. The tests were performed on LLNL's Optical Sciences Laser. A matrix of samples was exposed to single shots at 351 mn (3 omega) with average fluences from 4 to 8 J/cm2for pulse durations of 1, 3 and 10 ns. The damage sites were scatter-mapped after testing to determine the damage evolution as a fimction of local beam fluence. The average bulk damage microcavity (pinpoint) density varied nearly linearly with fluence with peak values of approximately 16,000 pp/mm3 at 1 ns, 10,000 pp/mm at 3 ns and 400 pp/mm3 at 10 ns for fluences in the 8-10 J/cm(sup 2) range. The average size of a pinpoint was 10(+14,-9) pm at 1 ns, 37 + or - 20 pm at 3 ns and -110 pm at 10 ns, although all pulse durations produced pinpoints with a wide distribution of sizes. Analysis of the pinpoint density data yielded pulse-scaling behavior of t (sup 0.35).

[发布机构] Technical Information Center Oak Ridge Tennessee

[学科分类] 工程和技术（综合）

[关键词] KDP;DKDP;Bulk laser damage;Pulse scaling;Obscuration