Laser-driven proton acceleration from ultrathin foils with nanoholes

被引:19
作者
Cantono, Giada [1 ]
Permogorov, Alexander [1 ]
Ferri, Julien [2 ]
Smetanina, Evgeniya [3 ]
Dmitriev, Alexandre [3 ]
Persson, Anders [1 ]
Fulop, Tuende [2 ]
Wahlstrom, Claes-Goeran [1 ]
机构
[1] Lund Univ, Dept Phys, SE-22100 Lund, Sweden
[2] Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden
[3] Univ Gothenburg, Dept Phys, SE-41296 Gothenburg, Sweden
关键词
D O I
10.1038/s41598-021-84264-z
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Structured solid targets are widely investigated to increase the energy absorption of high-power laser pulses so as to achieve efficient ion acceleration. Here we report the first experimental study of the maximum energy of proton beams accelerated from sub-micrometric foils perforated with holes of nanometric size. By showing the lack of energy enhancement in comparison to standard flat foils, our results suggest that the high contrast routinely achieved with a double plasma mirror does not prevent damaging of the nanostructures prior to the main interaction. Particle-in-cell simulations support that even a short scale length plasma, formed in the last hundreds of femtoseconds before the peak of an ultrashort laser pulse, fills the holes and hinders enhanced electron heating. Our findings reinforce the need for improved laser contrast, as well as for accurate control and diagnostics of on-target plasma formation.
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页数:10
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