Ultra-high-pressure generation in the relativistic transparency regime in laser-irradiated nanowire arrays

Ong, J. F.; Ghenuche, Petru; Turcu, I. C. E.; Pukhov, A.; Tanaka, K. A.

doi:10.1103/physreve.107.065208

Cited by 4 publications

(1 citation statement)

References 34 publications

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“…At laser intensities even higher than the 'Nano-Z-pinch regime', the laser electro-magnetic field can actually penetrate inside the nanowire array and indeed into the substrate material because the laser-plasma interaction occurs in the 'relativistic transparency regime' as shown in [23] and [25].…”

Section: Borane Nano-wire Targets For P-b Alpha-sources Driven By Fem...mentioning

confidence: 99%

Borane (B_mH_n), Hydrogen rich, Proton Boron fusion fuel materials for high yield laser-driven Alpha sources

Turcu,

Margarone,

Giuffrida

et al. 2024

J. Inst.

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We propose for the first time, a new fuel-material for laser-driven Proton Boron (P-B) fusion nuclear reactions. We propose, Hydrogen rich, Borane (B m H n ) materials as fusion fuel as compared to Boron Nitride (BN) presently used. We estimate more than 10-fold increase in the yield of nuclear fusion reactions, and Alpha-prticle flux, when, for example Ammonia Borane (BNH6) laser-target material will be used compared to the state of the art normalized flux ∼108 Alphas/sr/J from BN targets. BNH6 contains ∼1000× higher concentration of Hydrogen compared to BN. We report the manufacture of the first solid-pellets Ammonia Borane laser-targets. To obtain high Flux Alpha sources from repetitive lasers we propose new BNH6 target geometries: liquid (molten) droplets/jets; or translated tape- or disc-targets coated with BNH6 powder. Targets would be irradiated in low pressure, ambient buffer gas. To enhance the fusion/Alpha yield of ultra-high intensity PetaWatt laser-target interaction we propose nano- and micro-structured Borane targets. As applications, we propose to use the Alpha-driven nuclear reactions inside the laser-driven Borane targets for new schemes to produce short-lived medical radioisotopes. Such laser-driven radioisotope beamlines would be installed directly in hospitals. Borane materials, like Diborane (6), B2H6, are also proposed as nuclear-fuels for laser-driven Proton-Boron fusion energy generation. The high dilution of Boron in Hydrgen B/H = 33% would need to be further enahnced to B/H < 15% to cut radiation losses from the hot and dense fusion pellet.

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Section: Borane Nano-wire Targets For P-b Alpha-sources Driven By Fem...mentioning

confidence: 99%

Borane (B_mH_n), Hydrogen rich, Proton Boron fusion fuel materials for high yield laser-driven Alpha sources

Turcu,

Margarone,

Giuffrida

et al. 2024

J. Inst.

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Nanowire implosion under laser amplified spontaneous emission pedestal irradiation

Ong,

Zubarev,

Berceanu

et al. 2023

Sci Rep

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Nanowire array targets exhibit high optical absorption when interacting with short, intense laser pulses. This leads to an increased yield in the production of accelerated particles for a variety of applications. However, these interactions are sensitive to the laser prepulse and could be significantly affected. Here, we show that an array of aligned nanowires is imploded when irradiated by an Amplified Spontaneous Emission pedestal of a $$1\,\text{PW}$$ 1 PW laser with an intensity on the order of $$10^{11}\, \mathrm {W \, cm^{-2}}$$ 10 11 W cm - 2 . Using radiation hydrodynamics simulations, we demonstrate that the electron density profile is radially compressed at the tip by the rocket-like propulsion of the ablated plasma. The mass density compression increases up to $$2.9\times$$ 2.9 × when a more dense nanowire array is used. This is due to the ablation pressure from the neighboring nanowires. These findings offer valuable information for selecting an appropriate target design for experiments aimed at enhancing production of accelerated particles.

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Dynamic convergent shock compression initiated by return current in high-intensity laser–solid interactions

Yang,

Rehwald,

Kluge

et al. 2024

Matter and Radiation at Extremes

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We investigate the dynamics of convergent shock compression in solid cylindrical targets irradiated by an ultrafast relativistic laser pulse. Our particle-in-cell simulations and coupled hydrodynamic simulations reveal that the compression process is initiated by both magnetic pressure and surface ablation associated with a strong transient surface return current with density of the order of 1017 A/m2 and lifetime of 100 fs. The results show that the dominant compression mechanism is governed by the plasma β, i.e., the ratio of thermal pressure to magnetic pressure. For targets with small radius and low atomic number Z, the magnetic pressure is the dominant shock compression mechanism. According to a scaling law, as the target radius and Z increase, the surface ablation pressure becomes the main mechanism generating convergent shocks. Furthermore, an indirect experimental indication of shocked hydrogen compression is provided by optical shadowgraphy measurements of the evolution of the plasma expansion diameter. The results presented here provide a novel basis for the generation of extremely high pressures exceeding Gbar (100 TPa) to enable the investigation of high-pressure physics using femtosecond J-level laser pulses, offering an alternative to nanosecond kJ-laser pulse-driven and pulsed power Z-pinch compression methods.

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Ultra-high-pressure generation in the relativistic transparency regime in laser-irradiated nanowire arrays

Cited by 4 publications

References 34 publications

Borane (B_mH_n), Hydrogen rich, Proton Boron fusion fuel materials for high yield laser-driven Alpha sources

Borane (B_mH_n), Hydrogen rich, Proton Boron fusion fuel materials for high yield laser-driven Alpha sources

Nanowire implosion under laser amplified spontaneous emission pedestal irradiation

Dynamic convergent shock compression initiated by return current in high-intensity laser–solid interactions

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Ultra-high-pressure generation in the relativistic transparency regime in laser-irradiated nanowire arrays

Cited by 4 publications

References 34 publications

Borane (B m H n ), Hydrogen rich, Proton Boron fusion fuel materials for high yield laser-driven Alpha sources

Borane (B m H n ), Hydrogen rich, Proton Boron fusion fuel materials for high yield laser-driven Alpha sources

Nanowire implosion under laser amplified spontaneous emission pedestal irradiation

Dynamic convergent shock compression initiated by return current in high-intensity laser–solid interactions

Contact Info

Product

Resources

About

Borane (B_mH_n), Hydrogen rich, Proton Boron fusion fuel materials for high yield laser-driven Alpha sources

Borane (B_mH_n), Hydrogen rich, Proton Boron fusion fuel materials for high yield laser-driven Alpha sources