High-repetition-rate hard X-ray generation with sub-millijoule femtosecond laser pulses

被引：0

作者：

M. Hagedorn

J. Kutzner

G. Tsilimis

H. Zacharias

机构：

[1] Westfälische Wilhelms Universität,Physikalisches Institut

来源：

Applied Physics B | 2003年 / 77卷

关键词：

Pulse Energy; Laser Pulse Energy; Focal Intensity; Spectral Energy Density; Apply Laser Pulse;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Hard X-ray radiation is generated at 1-kHz repetition rate on metal targets using 30-fs sub-millijoule laser pulses. Spinning-disc targets of medium-Z (Ti, Cr, Fe, Ni, Cu, Zn and Mo) and high-Z (Ta) metals are investigated. For medium-Z targets, characteristic K-shell emission (Kα and Kβ) is observed in the 4–20 keV energy range in addition to a broadband bremsstrahlung background. Whereas in former studies similar results have been obtained by applying laser pulses in the tens-to-hundreds-of-millijoules range, we observe characteristic X-ray generation even at applied pulse energies as low as 100 μJ. The well-defined emission wavelength, the high intensity and the high brightness of this radiation makes this source a promising tool for time-resolved experiments with high-repetition-rate (≥10 kHz) small-scale table-top laser systems .

引用

页码：49 / 57

页数：8