Measurement of femtosecond laser-driven X-ray focal spot with repetition frequency

被引：0

作者：

Wang, Hongjian ^{[1
,2
]}

Yang, Qingguo ^{[2
]}

Ye, Yan ^{[2
]}

Li, Jun ^{[2
]}

Meng, Limin ^{[2
]}

Yu, Yong ^{[2
]}

Wang, Hairong ^{[2
]}

Mu, Jian ^{[2
]}

Peng, Qixian ^{[2
]}

Li, Zeren ^{[2
]}

机构：

[1] Chongqing Engineering Technology Research Center for Information Management in Development, Chongqing Key Laboratory of Manufacturing Equipment Mechanism Design and Control, Chongqing Technology and Business University, Chongqing

[2] Institute of Fluid Physics, CAEP, Mianyang

来源：

Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2015年 / 27卷 / 03期

关键词：

Knife-edge method; Laser interaction with matter; Repetition frequency; Spatial resolution;

D O I：

10.11884/HPLPB201527.032039

中图分类号：

学科分类号：

摘要：

In order to obtain focal spot size and spatial resolution of X-ray driven by the ultra-intense laser, a new method was designed to diagnose with a 0.2-μm-thick knife-edge attached two different meshes, one copper mesh of 400 meshes and another nickel of 394 line pairs per centimeter. The X-ray was obtained by X-ray CCD. Tisapphire laser (1 J/40 fs/10 Hz) with an intensity of approximately 4.4×1018 W/cm2 shot the disc Cu target by repetition frequency. The experiment was carried out successfully on a 25 TW laser device at CAEP, in which the first focal spot and the X-ray image of the meshes were both obtained. The estimated focal spot of the X-ray was 43 μm, and the estimated spatial resolution was 34 μm. The results showed that the method of knife-edge and two meshes was suitable for the measurement of focal spot size of X-ray driven by ultra-intense laser. ©, 2015, Editorial Office of High Power Laser and Particle Beams. All right reserved.

引用

页数：5

共 14 条

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