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• High Power Laser Science and Engineering
• Vol. 8, Issue 1, 010000e4 (2020)
Zongxin Zhang1, Fenxiang Wu1, Jiabing Hu1、2, Xiaojun Yang1, Jiayan Gui1, Penghua Ji3, Xingyan Liu3, Cheng Wang1, Yanqi Liu1, Xiaoming Lu1, Yi Xu1、†, Yuxin Leng1、†, Ruxin Li1、3, and Zhizhan Xu1
Author Affiliations
• 1State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai201800, China
• 2University of Chinese Academy of Sciences, Beijing100049, China
• 3ShanghaiTech University, Shanghai201210, China
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Abstract

In this paper, we report the recent progress on the $1~\text{PW}/0.1~\text{Hz}$ laser beamline of Shanghai Superintense Ultrafast Laser Facility (SULF). The SULF-1 PW laser beamline is based on the double chirped pulse amplification (CPA) scheme, which can generate laser pulses of 50.8 J at 0.1 Hz after the final amplifier; the shot-to-shot energy fluctuation of the amplified pulse is as low as 1.2% (std). After compression, the pulse duration of 29.6 fs is achieved, which can support a maximal peak power of 1 PW. The contrast ratio at $-80~\text{ps}$ before main pulse is measured to be $2.5\times 10^{-11}$. The focused peak intensity is improved by optimizing the angular dispersion in the grating compressor. The maximal focused peak intensity can reach $2.7\times 10^{19}~\text{W}/\text{cm}^{2}$ even with an $f/26.5$ off-axis parabolic mirror. The horizontal and vertical angular pointing fluctuations in 1 h are measured to be 1.89 and $2.45~\unicode[STIX]{x03BC}\text{rad}$, respectively. The moderate repetition rate and the good stability are desirable characteristics for laser–matter interactions. The SULF-1 PW laser beamline is now in the phase of commissioning, and preliminary experiments of particle acceleration and secondary radiation under 300–400 TW/0.1 Hz laser condition have been implemented. The progress on the experiments and the daily stable operation of the laser demonstrate the availability of the SULF-1 PW beamline.
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Zongxin Zhang, Fenxiang Wu, Jiabing Hu, Xiaojun Yang, Jiayan Gui, Penghua Ji, Xingyan Liu, Cheng Wang, Yanqi Liu, Xiaoming Lu, Yi Xu, Yuxin Leng, Ruxin Li, Zhizhan Xu. The 1 PW/0.1 Hz laser beamline in SULF facility[J]. High Power Laser Science and Engineering, 2020, 8(1): 010000e4