Enhancement of extreme ultraviolet emission from laser irradiated targets by surface nanostructures

Barte, Ellie Floyd; Lokasani, Ragava; Proška, Jan; Marešová, Lucie; Kos, Domagoj; Maguire, Oisín; Joseph, G. B.; Sheil, John; O’Reilly, Fergal; McCormack, Tom; Sokell, Emma; O'Sullivan, Gerry; Limpouch, J.; Dunne, Padraig

doi:10.1017/s0263034617000623

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…It is shown that mixed, multilayer and surface-structured targets can be used to increase the laser energy absorption. For example, high-Z mixture targets [27], porous or foamlike targets [28][29][30][31], multilayer targets [32,33], nanowire arrays [34][35][36], gratings [37][38][39] and doped aerogel targets [40,41]. In this context, investigations conducted on low density structured materials have shown that foam-attached targets or multilayer targets consisting in a solid substrate coated with a low-density layer offer significant enhancement of laser energy absorption and electron heating leading to higher conversion efficiency of laser energy into x-rays or energetic particles [29-31, 42, 43].…”

Section: Introductionmentioning

confidence: 99%

Efficient absorption of laser light by nano-porous materials with well-controlled structure

Fazeli

2020

Laser Phys. Lett.

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The absorption of high-power nanosecond laser pulses in a porous matter is investigated through theoretical and numerical calculations. The effects of structural properties of the porous target such as size of pores and thickness of solid elements on the laser absorption are investigated. The time and space-dependent absorption coefficient of the laser created partially homogenized plasma is used in a plasma hydrodynamic code to reproduce the laser absorption and plasma formation processes in a porous matter. It is observed that the structural characteristics of the porous material can be optimized to significantly increase the laser energy absorption. For porous targets with pore sizes in the range 30-60 nm a value around 1000 nm could be desirable for the wall thickness to increase the laser absorption efficiency to more than 90%. The results can be advantageous in production of efficient laser absorber targets which are desirable in advanced applications such as inertial confinement fusion and laser-plasma x-ray sources.

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Section: Introductionmentioning

confidence: 99%

Efficient absorption of laser light by nano-porous materials with well-controlled structure

Fazeli

2020

Laser Phys. Lett.

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“…Synthesis of well-defined low density tin targets have a merit for supporting a wide range of materials consisting of various elements, exact shape, pore size, density etc [16][17][18][19][20] . Plasma generated from low density materials or nanostructured targets have a reduced opacity, increasing the CE as the plasma becomes less dense 6,[18][19][20][21][22][23][24][25][26] . Moreover, the flexibility of materials science is exciting for quantum beam sources; the desired wavelength of light can be selected based on specific elements supported by a low density scaffold.…”

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confidence: 99%

Easy-handling minimum mass laser target scaffold based on sub-millimeter air bubble -An example of laser plasma extreme ultraviolet generation-

Musgrave

Shoji

Nagai

2020

Sci Rep

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Low density materials can control plasma properties of laser absorption, which can enhance quantum beam generation. The recent practical extreme ultraviolet light (EUV) is the first industrial example of laser plasma source with low density targets. Here we propose an easy-handling target source based on a hollow sub-millimeter microcapsule fabricated from polyelectrolyte cationic and anionic surfactant on air bubbles. The lightweight microcapsules acted as a scaffold for surface coating by tin (IV) oxide nanoparticles (22-48%), and then dried. As a proof of concept study, the microcapsules were ablated with a Nd:YAG laser (7.1 × 10 10 W/cm 2 , 1 ns) to generate 13.5 nm EUV relatively directed to laser incidence. The laser conversion efficiency (CE) at 13.5 nm 2% bandwidth from the tin-coated microcapsule (0.8%) was competitive compared with bulk tin (1%). We propose that microcapsule aggregates could be utilized as a potential small scale/compact EUV source, and future quantum beam sources by changing the coating to other elements.

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Enhancement of extreme ultraviolet emission from laser irradiated targets by surface nanostructures

Cited by 2 publications

References 23 publications

Efficient absorption of laser light by nano-porous materials with well-controlled structure

Efficient absorption of laser light by nano-porous materials with well-controlled structure

Easy-handling minimum mass laser target scaffold based on sub-millimeter air bubble -An example of laser plasma extreme ultraviolet generation-

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