Yield optimization and time structure of femtosecond laser plasma Kα sources

被引：220

作者：

Reich, C ^{[1
]}

Gibbon, P ^{[1
]}

Uschmann, I ^{[1
]}

Förster, E ^{[1
]}

机构：

[1] Univ Jena, Inst Opt & Quantenelekt, Abt Ronthenopt, D-07743 Jena, Germany

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.84.4846

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The generation of femtosecond K alpha x rays from laser-irradiated plasmas is studied with a view to optimizing photon number and pulse duration. Using analytical and numerical models of hot electron generation and subsequent transport in a range of materials, it is shown that an optimum laser intensity I-opt = 7 X 10(9)Z(4.4) exists for maximum K alpha yield. Furthermore. it is demonstrated that bulk targets are unsuitable for generating sub-ps x-ray pulses: instead, design criteria are proposed for achieving K alpha pulse durations less than or equal to 100 fs using foils of approximate to 2 mu m thickness.

引用

页码：4846 / 4849

页数：4

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