Characterization of electron beam propagation through foils by innershell X-ray spectroscopy

被引：8

作者：

Pretzler, G

Schlegel, T

Fill, E

机构：

[1] Max Planck Inst Quantenopt, D-85748 Garching, Germany

[2] Univ Munich, Sekt Phys, D-85748 Garching, Germany

[3] Gesell Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

来源：

LASER AND PARTICLE BEAMS | 2001年 / 19卷 / 01期

关键词：

D O I：

10.1017/S0263034601191147

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Characteristic X-rays generated by high-intensity laser interaction with solids were investigated and used for determining the resulting hot electron populations. Spectrally as well as spatially resolved data are evaluated for this purpose. The experimental data were compared with Monte Carlo simulations to determine the electron energy distribution and geometric features of the electron beam. These results are in good agreement with PIC simulations. The self-generated low-resistivity channel of the electron beam results in a distinct difference in the generated rear-side X-ray spot when the electron beam propagates in an insulator rather than a metal. Self-generated electric fields prevent electron propagation into the vacuum. This fact is used for demonstrating photopumping of cobalt with copper K-alpha radiation, an experiment relevant to innershell X-ray laser schemes. The emission of cobalt is compared with that of nickel, which is not photopumped by copper K-alpha, and is found to be enhanced by a factor of 2.5.

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页码：91 / 97

页数：7

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