Graphitization of diamond by laser-accelerated proton beams

Barberio, M.; Vallières, S.; Scisciò, M.; Kolhatkar, Gitanjali; Ruediger, Andréas; Antici, P.

doi:10.1016/j.carbon.2018.06.031

Cited by 18 publications

(7 citation statements)

References 42 publications

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“…Laser-driven proton acceleration, as obtained by the interaction of a high-intensity laser with a target, is a growing field of interest, in particular, for the different potential applications that are consolidating or emerging. These applications include their use in ultrafast radiography [1], novel fusion schemes [2], high-energy density matter [3], laboratory astrophysics [4], medical applications [5][6][7], novel neutron sources [8], cultural heritage [9,10], using them as injectors for larger accelerators [11,12], and material science [13][14][15][16]. Many of these applications build on the routine production of protons, where one of the main challenges is to optimize the proton energy and yield given specific laser parameters.…”

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confidence: 99%

“…1(b)]. We considered this target material since it is one of the most used and cheapest target materials in laserdriven proton acceleration, was producing the best results compared to other materials and thicknesses when used as a proton source [13,39], and the wetting properties between them and the gold or silver NPs can ensure the realization of a uniform nanostructured film on the surface with limited aggregation of nanoparticles [40]. As shown in Fig.…”

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confidence: 99%

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Enhanced laser-driven proton acceleration using ultrasmall nanoparticles

Vallières

Barberio

Scisciò

et al. 2019

Phys. Rev. Accel. Beams

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An efficient way to enhance laser-driven proton acceleration is by increasing the laser-to-target energy transfer, which can be obtained using nanostructured target surfaces. In this paper, we show that inexpensive and easily producible solid target nanostructuration using ultrasmall nanoparticles having 10 nm in diameter exhibits a nearly twofold maximum proton energy and proton number enhancement. Results are confirmed by particle-in-cell simulations, for several laser pulse lengths. A parameter scan analyzing the effect of the nanoparticle diameter and space gap between the nanospheres shows that the gap has a stronger influence on the enhancement mechanism than the sphere diameter.

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confidence: 99%

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confidence: 99%

Enhanced laser-driven proton acceleration using ultrasmall nanoparticles

Vallières

Barberio

Scisciò

et al. 2019

Phys. Rev. Accel. Beams

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“…Many researchers working in different infrastructures are currently investigating potential applications where these laser-generated beams can outperform conventionally generated particles 1 and become usable laser-based particle beamlines 2–9 . Recently, strong attention has been devoted to applications in materials science, with some pioneering works published recently 10–15 . This includes investigations associated with Cultural Heritage 16 , since the field is currently hampered by the lack of techniques and diagnostics suitable for the conservation and the preservation of artworks or monuments 17,18 .…”

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confidence: 99%

Laser-PIXE using laser-accelerated proton beams

Barberio

Antici

2019

Sci Rep

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Laser-driven proton acceleration is a field of growing interest, in particular for its numerous applications, including in the field of materials science. A benefit of these laser-based particle sources is their potential for a relative compactness in addition to some characteristics at the source that differ from those of conventional, radio-frequency based proton sources. These features include, e.g ., a higher brilliance, a shorter duration, and a larger energy spread. Recently, the use of laser-accelerated protons has been proposed in the field of Cultural Heritage, as alternative source for the Particle Induced X-ray Emission diagnostic (“laser-PIXE”), a particular ion beam analysis (IBA) technique that allows to precisely analyse the chemical composition of the material bulk. In this paper we study the feasibility of the laser-PIXE using laser-accelerated proton beams. We focus on materials specifically of interest for the Cultural Heritage domain. Using Geant4 simulations, we show that the laser-PIXE allows analysing a larger volume than conventional PIXE, profiting from the large energy spread of laser-accelerated protons. Furthermore, for specific materials, the large energy spread allows investigating multilayer materials, providing an advantage compared to conventional PIXE technologies.

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“…These laser-generated proton beams have unique characteristics, such as high charge (10 13 particles/shot), high laminarity at the source, short bunch duration (ps at the source), and a high peak current (kA at the source). These characteristics make them desirable candidates for several applications that require one or more of the mentioned properties, such as biomedicine (tumor treatment, PET, radiography) (Bulanov et al, 2002;Malka et al, 2004), warm dense matter (Patel et al, 2003;Antici et al, 2006;Bulanov et al, 2010;Mancic et al, 2010), hybrid acceleration schemes (Antici et al, 2008;Scisciò et al, 2018) and material science (Dromey et al, 2016;Barberio et al, 2017aBarberio et al, , 2018aBarberio et al, , 2018b. Recently, the use of laseraccelerated proton beams as diagnostic for chemical analysis of cultural heritage (CH) artifacts has been investigated (Barberio et al, 2017b; Barberio and Antici, 2019;Passoni et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of a laser-PIXE beamline for material science applications

et al. 2019

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Multi-MeV proton beams can be generated by irradiating thin solid foils with ultra-intense (>1018 W/cm2) short laser pulses. Several of their characteristics, such as high bunch charge and short pulse duration, make them a complementary alternative to conventional radio frequency-based accelerators. A potential material science application is the chemical analysis of cultural heritage (CH) artifacts. The complete chemistry of the bulk material (ceramics, metals) can be retrieved through sophisticated nuclear techniques such as particle-induced X-ray emission (PIXE). Recently, the use of laser-generated proton beams was introduced as diagnostics in material science (laser-PIXE or laser-driven PIXE): Coupling laser-generated proton sources to conventional beam steering devices successfully enhances the capture and transport of the laser-accelerated beam. This leads to a reduction of the high divergence and broad energy spread at the source. The design of our hybrid beamline is composed of an energy selector, followed by permanent quadrupole magnets aiming for better control and manipulation of the final proton beam parameters. This allows tailoring both, mean proton energy and spot sizes, yet keeping the system compact. We performed a theoretical study optimizing a beamline for laser-PIXE applications. Our design enables monochromatizing the beam and shaping its final spot size. We obtain spot sizes ranging between a fraction of mm up to cm scale at a fraction of nC proton charge per shot. These results pave the way for a versatile and tunable laser-PIXE at a multi-Hz repetition rate using modern commercially available laser systems.

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Graphitization of diamond by laser-accelerated proton beams

Cited by 18 publications

References 42 publications

Enhanced laser-driven proton acceleration using ultrasmall nanoparticles

Enhanced laser-driven proton acceleration using ultrasmall nanoparticles

Laser-PIXE using laser-accelerated proton beams

Design and optimization of a laser-PIXE beamline for material science applications

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