Optimization of a Laser Plasma X-Ray Source for Ultrafast X-Ray Absorption Spectroscopy

被引：3

作者：

Iqbal, Mazhar ^{[1
]}

Ijaz, Muhammad ^{[1
]}

Noh, Do Young ^{[1
]}

Janulewicz, Karol A. ^{[2
]}

Stiel, Holger ^{[3
]}

Nickles, Peter V. ^{[3
]}

机构：

[1] Gwangju Inst Sci & Technol, Dept Phys & Photon Sci, Gwangju 61005, South Korea

[2] Mil Inst Technol, Warsaw, Poland

[3] Max Born Inst, Max Born Str 24, D-12489 Berlin, Germany

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2017年 / 70卷 / 10期

基金：

新加坡国家研究基金会;

关键词：

Laser plasma x-ray source; Optimization; XANES; PULSES; SPECTROMETER;

D O I：

10.3938/jkps.70.905

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present optimization of laser plasma x-ray experimental conditions for ultrafast x-ray absorption spectroscopy measurements on broad range of transition metal oxides. First, the x-ray flux generated from a laser plasma source was optimized with an emphasis on the Bremsstrahlung by investigating the influence of the angle of the incidence of laser beam on a Cu tape target. The x-ray flux emitted in both the front and transmitted side of the target was found to be optimal at the incident angle of 15 similar to 25 degrees. Moreover the manipulation of the Bremsstrahlung peak energy by the laser focus distribution was discussed. In addition to the source optimization, we present a scheme to find the time-delay zero position in a pump-probe experiment together with a normalization scheme for x-ray source fluctuations. As a feasibility check, we present the transmitted spectra of two materials, Ni and NiO.

引用

页码：905 / 911

页数：7

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