Accelerated protons with energies up to 70 MeV based on the optimized SG-II Peta-watt laser facility

IF 5.2 1区物理与天体物理 Q1 OPTICS High Power Laser Science and Engineering Pub Date : 2023-06-30 DOI:10.1017/hpl.2023.54

H. H. An, W. Wang, J. Xiong, C. Wang, X. Pan, X. P. Ouyang, S. Jiang, Z. Xie, P. P. Wang, Y. L. Yao, N. Hua, Y. Wang, Z. C. Jiang, Q. Xiao, F. C. Ding, Y. Wan, X. Liu, R. R. Wang, Z. Fang, P. Q. Yang, Y. E. Jiang, P. Z. Zhang, B. Q. Zhu, J. Sun, B. Qiao, A. Lei, J. Zhu

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Abstract

Abstract The target backsheath field acceleration mechanism is one of the main mechanisms of laser-driven proton acceleration (LDPA) and strongly depends on the comprehensive performance of the ultrashort ultra-intense lasers used as the driving sources. The successful use of the SG-II Peta-watt (SG-II PW) laser facility for LDPA and its applications in radiographic diagnoses have been manifested by the good performance of the SG-II PW facility. Recently, the SG-II PW laser facility has undergone extensive maintenance and a comprehensive technical upgrade in terms of the seed source, laser contrast and terminal focus. LDPA experiments were performed using the maintained SG-II PW laser beam, and the highest cutoff energy of the proton beam was obviously increased. Accordingly, a double-film target structure was used, and the maximum cutoff energy of the proton beam was up to 70 MeV. These results demonstrate that the comprehensive performance of the SG-II PW laser facility was improved significantly.

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基于优化的SG-II Peta-watt激光设备的能量高达70 MeV的加速质子

目标后鞘场加速机制是激光驱动质子加速(LDPA)的主要机制之一，它在很大程度上取决于作为驱动源的超短超强激光的综合性能。SG-II Peta-watt (SG-II PW)激光设备在LDPA诊断中的成功应用及其在放射诊断中的应用已经通过SG-II PW设备的良好性能得到了体现。最近，SG-II PW激光设备在种子源、激光对比和终端聚焦方面进行了广泛的维护和全面的技术升级。利用SG-II型PW激光束进行了LDPA实验，发现质子束的最高截止能量明显提高。因此，采用双膜靶结构，质子束的最大截止能量可达70 MeV。结果表明，SG-II型PW激光设备的综合性能得到了显著提高。

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来源期刊

High Power Laser Science and Engineering Physics and Astronomy-Nuclear and High Energy Physics

CiteScore

7.10

自引率

4.20%

发文量

401

审稿时长

21 weeks

期刊介绍： High Power Laser Science and Engineering (HPLaser) is an international, peer-reviewed open access journal which focuses on all aspects of high power laser science and engineering. HPLaser publishes research that seeks to uncover the underlying science and engineering in the fields of high energy density physics, high power lasers, advanced laser technology and applications and laser components. Topics covered include laser-plasma interaction, ultra-intense ultra-short pulse laser interaction with matter, attosecond physics, laser design, modelling and optimization, laser amplifiers, nonlinear optics, laser engineering, optical materials, optical devices, fiber lasers, diode-pumped solid state lasers and excimer lasers.