Enhanced laser-driven backward proton acceleration using micro-wire array targets
Abstrak
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 (∼2×1020W/cm2) laser pulse of ∼ 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.
Topik & Kata Kunci
Penulis (25)
Lulin Fan
Lulin Fan
Tongjun Xu
Qingsong Wang
Jiancai Xu
Guoqiang Zhang
Guoqiang Zhang
Putong Wang
Putong Wang
Changbo Fu
Zhiguo Ma
Xiangai Deng
Yugang Ma
Shun Li
Xiaoming Lu
Jinfeng Li
Rongjie Xu
Cheng Wang
Xiaoyan Liang
Yuxin Leng
Baifei Shen
Baifei Shen
Liangliang Ji
Ruxin Li
Ruxin Li
Akses Cepat
- Tahun Terbit
- 2023
- Sumber Database
- DOAJ
- DOI
- 10.3389/fphy.2023.1167927
- Akses
- Open Access ✓