Efficient generation of fast ions from surface modulated nanostructure targets irradiated by high intensity short-pulse lasers

Andreev, Alexander A.; Kumar, Naveen; Platonov, K. Yu.; Pukhov, A.

doi:10.1063/1.3641965

Cited by 58 publications

(59 citation statements)

References 24 publications

(23 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the help of the modified code PSC, the modelling was performed for different targets. In 2D simulations with our PIC code [6] It was shown [18] that in case of a target with a non-structured rear side the electric field at the rear side has a regular profile. Contrary, at the structured front side, the field reproduces a relief distribution.…”

Section: Simulation Modelmentioning

confidence: 99%

Relativistic laser nano-plasmonics for effective fast particle production

Andreev¹,

Platonov²,

Braenzel

et al. 2015

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

Particle acceleration and X-ray generation in different nano-structured targets irradiated by high intensity laser pulses of high contrast have been studied. It is found that maximal energy of fast particles and its directionality can be significantly enhanced, by choosing nano-structured targets. Generation and propagation of fast electrons in laser targets consisting of nano-wires are studied. Such targets exhibit a large conversion of laser energy into electron kinetic energy. An electron bunch can propagate a long distance and can be focused by bringing wires together. The results of theory and simulations were compared with the experimental data and have shown a reasonable consistency. IntroductionLaser driven nano-plasmonics deals with optical processes in plasmas at relatively low intensities and on nanoscale, i. e. on the order of or smaller than the wavelength of the laser radiation [1]. The underlying physical process is connected with a laser field enhancement due to proper nano-structuring of a target. Laser-matter interaction including nanoscale confinement of radiation and its transformation provides attractive opportunities for both, fundamental research and technological applications. Material processing uses femtosecond laser pulses exceeding the material ablation threshold to drill micro holes, to realize micro cutting or to selectively remove a particular substance. Such an extreme precision processing adds high value [2]. Due to the ultrashort pulse durations the results benefit by very clean and defined processing areas with negligible structural changes around. This is important in surgery (e. g. ophthalmology, dermatology, dentistry), for instance, when the ultrashort laser pulse irradiation enables clean surgery without damaging the side areas of the processed tissue [3].Laser nano-plasmons produced by structured surfaces have recently gained growing attention in laser plasma ion acceleration physics, as it can significantly enhance the acceleration mechanism. Today's research on laser driven particle acceleration (ions and electrons) promises future fast ion sources for different applications. Here, a laser at relativistic intensity interacts with thin solid foils, which can be well characterized and easily handled [4]. First, the laser causes an acceleration of the ionized electron distribution, which subsequently accelerates ions up to high kinetic energies. The low emittance of such ion beams is a striking feature [5]. Nevertheless, up to now the achieved acceleration efficiency is low (around a few to ten percent of the laser energy), even if the target thickness is optimized with respect to the laser parameters, thus current research is focusing on its optimization [6].

show abstract

Section: Simulation Modelmentioning

confidence: 99%

Relativistic laser nano-plasmonics for effective fast particle production

Andreev¹,

Platonov²,

Braenzel

et al. 2015

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

show abstract

“…Various simulation works attribute the observed improvement to a surface area increase and the local field enhancement introduced by the roughness [22][23][24][25]. Recently, several authors have shown that larger scale structures can give rise to enhanced production of hot electrons and/or high energy ions [26][27][28].…”

Section: B Target Designmentioning

confidence: 99%

Effects of front-surface target structures on properties of relativistic laser-plasma electrons

et al. 2014

View full text Add to dashboard Cite

We report the results of a study of the role of prescribed geometrical structures on the front of a target in determining the energy and spatial distribution of relativistic laser-plasma electrons. Our 3D PIC simulation studies apply to short-pulse, high intensity laser pulses, and indicate that a judicious choice of target front-surface geometry provides the realistic possibility of greatly enhancing the yield of high energy electrons, while simultaneously confining the emission to narrow (< 5• ) angular cones.

show abstract

“…To increase the number and energy of the hot electrons much effort has been spent on the improvement of the conversion efficiency of laser energy into hot electron energy. To foster conversion efficiency, not only the laser parameters, i.e., laser intensity, pulse duration and energy, but also the target design can be tuned [6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Laser-induced microstructures on silicon for laser-driven acceleration experiments

Ebert

Neumann

Abel

et al. 2017

High Pow Laser Sci Eng

View full text Add to dashboard Cite

Ultrashort laser pulses are used to create surface structures on thin (25 µm) silicon (Si) wafers. Scanning the wafer with a galvanometric mirror system creates large homogeneously structured areas. The variety of structure shapes that can be generated with this method is exemplified by the analysis of shape, height and distance of structures created in the ambient media air and isopropanol. A study of the correlation between structure height and remaining wafer thickness is presented. The comparatively easy manufacturing technique and the structure variety that allows for custom-tailored targets show great potential for high repetition rate ion acceleration experiments.

show abstract

Efficient generation of fast ions from surface modulated nanostructure targets irradiated by high intensity short-pulse lasers

Cited by 58 publications

References 24 publications

Relativistic laser nano-plasmonics for effective fast particle production

Relativistic laser nano-plasmonics for effective fast particle production

Effects of front-surface target structures on properties of relativistic laser-plasma electrons

Laser-induced microstructures on silicon for laser-driven acceleration experiments

Contact Info

Product

Resources

About