Laser-based Kα X-ray emission characterization using a high contrast ratio and high-power laser system

被引：21

作者：

Fourmaux, S. ^{[1
]}

Kieffer, J. C. ^{[1
]}

机构：

[1] Univ Quebec, INRS EMT, 1650 Lionel Boulet, Varennes, PQ J3X 1S2, Canada

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2016年 / 122卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

HOT-ELECTRONS; GENERATION; DRIVEN; FUTURE;

D O I：

10.1007/s00340-016-6442-8

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We characterized a laser-based K-alpha X-ray source produced onto a Mo solid target. We used a laser system with a high laser pulse contrast ratio (LPCR) and an instantaneous power similar to 30 TW. We investigated simultaneously the K-alpha X-ray conversion efficiency, the X-ray source size, and the proton front surface emission. We found a high K-alpha X-ray conversion efficiency up to 2 x 10(-4) associated with an X-ray source size only similar to 1.8 times larger than the laser focal spot for the highest intensities. We found that using a high LPCR laser pulse with 245 mJ per pulse is of interest to develop a laser-based X-ray imaging system as it can combine a high conversion efficiency with a small increase in the X-ray source size compared to the laser focal spot.

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页数：10

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