Enhanced laser-driven backward proton acceleration using micro-wire array targets

被引：1

作者：

Fan, Lulin ^{[1
,2
,3
]}

Xu, Tongjun ^{[1
,2
]}

Wang, Qingsong ^{[1
,2
]}

Xu, Jiancai ^{[1
,2
]}

Zhang, Guoqiang ^{[4
,5
]}

Wang, Putong ^{[3
,4
]}

Fu, Changbo ^{[6
]}

Ma, Zhiguo ^{[6
]}

Deng, Xiangai ^{[6
]}

Ma, Yugang ^{[6
]}

Li, Shun ^{[1
,2
]}

Lu, Xiaoming ^{[1
,2
]}

Li, Jinfeng ^{[1
,2
]}

Xu, Rongjie ^{[1
,2
]}

Wang, Cheng ^{[1
,2
]}

Liang, Xiaoyan ^{[1
,2
]}

Leng, Yuxin ^{[1
,2
]}

Shen, Baifei ^{[1
,2
,7
]}

Ji, Liangliang ^{[1
,2
]}

Li, Ruxin ^{[1
,2
,8
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, CAS Ctr Excellence Ultra Intense Laser Sci, Shanghai, Peoples R China

[3] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing, Peoples R China

[4] Chinses Acad Sci, Shanghai Inst Appl Phys, Shanghai, Peoples R China

[5] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai, Peoples R China

[6] Fudan Univ, Inst Modern Phys, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai, Peoples R China

[7] Shanghai Normal Univ, Dept Phys, Shanghai, Peoples R China

[8] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai, Peoples R China

来源：

FRONTIERS IN PHYSICS | 2023年 / 11卷

基金：

中国国家自然科学基金;

关键词：

laser-proton acceleration; micro-wire structure; high laser-proton energy coupling efficiency; high energy density plasma; laser-induced nuclear fusion; GENERATION;

D O I：

10.3389/fphy.2023.1167927

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Micro-structured targets can be employed to enhance the coupling of laser energy to the high energy density plasma. Here we report on experimental measurement of enhanced proton beam energy from laser-driven micro-wire array (MWA) targets along the backward direction. An ultra-intense (similar to 2 x 10(20)W/cm(2)) laser pulse of similar to 40 fs pulse duration interacts with the MWA structure and induces large population of energetic electrons. The enhanced sheath field efficiently accelerates protons both transversely and longitudinally. The spectrometers record proton cut-off energy of around 16 MeV and temperature 813keV along the backward direction, which is 20% - 60% higher than that of a flat target under commensurate laser conditions. Comparison with particle-in-cell simulations suggests that the enhancement originates from the increased temperature and population of the hot electrons within the micro-wires. These measurements provide a direct probe of the high energy density plasma condition in laser-driven solid targets and a useful benchmark for further studies on laser-driven micro-structured targets.

引用

页数：9

共 49 条

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