Cluster effects in soft x-ray pulse generation from femtosecond-laser-produced plasma on a metal-doped glass target

Hidetoshi Nakano; Tadashi Nishikawa; Naoshi Uesugi

doi:10.1117/12.279421

14 October 1997 Cluster effects in soft x-ray pulse generation from femtosecond-laser-produced plasma on a metal-doped glass target

Hidetoshi Nakano, Tadashi Nishikawa, Naoshi Uesugi

Author Affiliations +

Proceedings Volume 3157, Applications of X Rays Generated from Lasers and Other Bright Sources; (1997) https://doi.org/10.1117/12.279421
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

The soft x-ray emission from plasma on a gold-doped glass target produced by a 130-fs Ti:sapphire laser pulse was studied at a laser intensity range of 10¹⁵ - 10¹⁶ W/cm². To evaluate the effects of gold clusters in glass, we compared gold-doped glass with different gold cluster sizes while keeping the gold densities the same (approximately 0.001 vol%). We found that larger gold clusters led to an increase in soft x-ray emission integrated in the range from 5 to 20 nm. Integrated soft x- ray emission from a gold-doped glass target reached about 50% of that from a 1-micrometers thick gold film target. The gold clusters in glass enhanced the soft x-ray emissions about four times compared with a host glass which contained no gold clusters. The pulse durations of soft x-rays emitted from gold-doped glass targets were measured to be 4 - 7 ps, which were slightly shorter than those from a gold target. Due to the low metal density and high plasma formation threshold, particulate deposition, which is a serious obstacle in applying laser-produced plasma x-rays to practical use, was greatly reduced by the use of a gold- doped glass target. From these points of view, femtosecond laser-produced plasma x-ray emitted from metal-doped glass show promise as an ultrafast soft x-ray source.

Citation Download Citation

Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi "Cluster effects in soft x-ray pulse generation from femtosecond-laser-produced plasma on a metal-doped glass target", Proc. SPIE 3157, Applications of X Rays Generated from Lasers and Other Bright Sources, (14 October 1997); https://doi.org/10.1117/12.279421

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