Preferential enhancement of laser-driven carbon ion acceleration from optimized nanostructured surfaces

Dalui, Malay; Wang, Weimin; Trivikram, T. Madhu; Sarkar, Sreemoyee; Tata, Sheroy; Jha, J.; Ayyub, Pushan; Sheng, Zheng-Ming; Krishnamurthy, M.

doi:10.1038/srep11930

Cited by 19 publications

(18 citation statements)

References 37 publications

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“…On the temporal scale, the sheath electric field may have a lower peak value and gradient due to the rough NW surface compared to a flat surface, nevertheless the higher number of hotter electrons ultimately leads to a greater energy transfer to the ions also on the front target surface for backward acceleration. This is coherent with what is observed in the works of Dalui et al 38 , Cristoforretti et al 39 and as well in Bagchi et al 37 in the sub-relativistic regime where the laser intensity ( ) is sufficient to strongly ionize the target bulk and induces a charge separation that leads to the backward ion acceleration. In Fig.…”

Section: Experimental Campaignsupporting

confidence: 91%

Enhanced laser-driven proton acceleration using nanowire targets

Vallières

Salvadori

Permogorov

et al. 2021

Sci Rep

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Laser-driven proton acceleration is a growing field of interest in the high-power laser community. One of the big challenges related to the most routinely used laser-driven ion acceleration mechanism, Target-Normal Sheath Acceleration (TNSA), is to enhance the laser-to-proton energy transfer such as to maximize the proton kinetic energy and number. A way to achieve this is using nanostructured target surfaces in the laser-matter interaction. In this paper, we show that nanowire structures can increase the maximum proton energy by a factor of two, triple the proton temperature and boost the proton numbers, in a campaign performed on the ultra-high contrast 10 TW laser at the Lund Laser Center (LLC). The optimal nanowire length, generating maximum proton energies around 6 MeV, is around 1–2 $$\upmu$$ μ m. This nanowire length is sufficient to form well-defined highly-absorptive NW forests and short enough to minimize the energy loss of hot electrons going through the target bulk. Results are further supported by Particle-In-Cell simulations. Systematically analyzing nanowire length, diameter and gap size, we examine the underlying physical mechanisms that are provoking the enhancement of the longitudinal accelerating electric field. The parameter scan analysis shows that optimizing the spatial gap between the nanowires leads to larger enhancement than by the nanowire diameter and length, through increased electron heating.

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Section: Experimental Campaignsupporting

confidence: 91%

Enhanced laser-driven proton acceleration using nanowire targets

Vallières

Salvadori

Permogorov

et al. 2021

Sci Rep

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“…Several publications have reported that adding periodic nanostructures on the target front surface enhances drastically the laser energy absorption [13][14][15][16][17][18][19][20][21]. This generates ions with much higher energies than the ones obtained when targets with a flat surface are used [13,[20][21][22][23][24][25][26][27][28][29][30]. The nature of this enhancement is still a matter of discussion, however it is known that it is strongly dependent on the shape of the structures, as well as on the angle of incidence of the impinging laser [13-15, 17, 18, 21, 22, 26, 27].…”

Section: Introductionmentioning

confidence: 99%

Table-top laser-based proton acceleration in nanostructured targets

et al. 2017

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The interaction of ultrashort, high intensity laser pulses with thin foil targets leads to ion acceleration on the target rear surface. To make this ion source useful for applications, it is important to optimize the transfer of energy from the laser into the accelerated ions. One of the most promising ways to achieve this consists in engineering the target front by introducing periodic nanostructures. In this paper, the effect of these structures on ion acceleration is studied analytically and with multidimensional particle-in-cell simulations. We assessed the role of the structure shape, size, and the angle of laser incidence for obtaining the efficient energy transfer. Local control of electron trajectories is exploited to maximize the energy delivered into the target. Based on our numerical simulations, we propose a precise range of parameters for fabrication of nanostructured targets, which can increase the energy of the accelerated ions without requiring a higher laser intensity.

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“…Moreover, the laser-to-ion energy conversion efficiency in the experiments is typically only a few percent, [5,6,[17][18][19][20][21][22][23] which is even lower with ultrashort ultraintense (USUI) laser pulses. [24][25][26][27][28][29] Although there are many proposals [28][29][30][31][32][33][34][35] for enhancing heavy ion acceleration, the achievable energy conversion efficiency still remains rather low and the required laser parameters are difficult to realize in current laboratories. A more efficient and presently realizable heavy ion acceleration scheme is therefore highly demanding.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Heavy Ion Acceleration from Laser Interaction with Dusty Plasma

Zou

Jiang

et al. 2021

Advanced Photonics Research

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Energetic heavy ions with short duration can be generated in the interaction of ultrashort ultraintense (USUI) laser pulse with solid matter. However, the energy conversion efficiency from laser to heavy ions is usually very low. Herein, a novel scheme for efficient transfer of USUI laser energy to the heavy ions of microscopic dust grains in dusty plasma is proposed. Due to the resulting ultraintense space‐charge field, the heavy ions expand isotropically together with the laser heated and expelled grain electrons as a plasma cloud on roughly the ion acoustic timescale. It is found that with 3.1 × 1020 W cm−2 USUI laser, one can produce hundreds‐megaelectronvolt C6+ ions with ≈60% energy transfer efficiency. In fact, up to 300 GeV Au79+ ions with ≈30% energy transfer efficiency can be obtained by using 8.8 × 1023 W cm−2 laser. This result suggests the possibility of using hundreds‐petawatt laser facility to investigate heavy‐ion collisions for nuclear state detection and quantum cardiodynamics phase transition.

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Preferential enhancement of laser-driven carbon ion acceleration from optimized nanostructured surfaces

Cited by 19 publications

References 37 publications

Enhanced laser-driven proton acceleration using nanowire targets

Enhanced laser-driven proton acceleration using nanowire targets

Table-top laser-based proton acceleration in nanostructured targets

Highly Efficient Heavy Ion Acceleration from Laser Interaction with Dusty Plasma

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