KEV X-RAY-PRODUCTION USING 50-MJ KRF LASER-PRODUCED PLASMAS AT 1-PS AND 100-PS

被引：28

作者：

BROUGHTON, JN ^{[1
]}

FEDOSEJEVS, R ^{[1
]}

机构：

[1] UNIV ALBERTA,DEPT ELECT ENGN,EDMONTON T6G 2G7,ALBERTA,CANADA

来源：

JOURNAL OF APPLIED PHYSICS | 1993年 / 74卷 / 06期

关键词：

D O I：

10.1063/1.354518

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The emission of 800-1400 eV x rays from plasmas produced by KrF discharge laser pulses with durations in the range of 1 and 100 ps with energies up to 50 mJ has been studied using various metal targets. The emission spectra, angular distribution, and x-ray conversion efficiencies into 2pi Sr have been measured in vacuum. Peak conversion efficiencies of 10%-13% were obtained for Fe, Co, Ni, Cu, and Zn when a 90 ps, 50 mJ pulse was used. A 2 ps, 40 mJ pulse yielded efficiencies of 8%-10% with plasma reflectivity accounting for the reduction in conversion efficiency. An 850 fs, 35 mJ pulse gave reduced yields of 4% for Cu. In a background gas of 1 atm helium a reduction of conversion efficiency by 15% was observed for 90 ps pulses.

引用

页码：3712 / 3723

页数：12

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