Low divergent MeV-class proton beam with micrometer source size driven by a few-cycle laser pulse

Singh, Prashant Kumar; Varmazyar, Parvin; Nagy, Bence; Csontos, János; Ter‐Avetisyan, S.; Osvay, K.

doi:10.1038/s41598-022-12240-2

Cited by 7 publications

(4 citation statements)

References 52 publications

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“…where δR p depends on the pinhole size [18,23,38]. The overall energy resolution for the total analyzed energy range, i.e., from a few keV up to 100 MeV, slightly decreases, as expected in the case of the linear gradient.…”

Section: Optimized Design For Proton Spectrum With 100 Mev Cut-off En...supporting

confidence: 58%

“…In Section 4.1, we have shown that a higher energy spectral range can be achieved, without significant losses in terms of energy resolution. This "new" detectable low proton energy range is particularly relevant for applications, such as the ones in cultural heritage [39,40], laser driven proton boron fusion [41,42] and towards the perspective of low divergent MeV-class proton beam with micrometer source size driven by a few-cycle laser pulse [38]. The minimum detectable proton energy value, for the TP geometry that we are proposing, becomes 0.38 MeV.…”

Section: Discussionmentioning

confidence: 81%

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Novel Spectrometer Designs for Laser Driven Ion Acceleration

Morabito,

Nelissen,

Migliorati

et al. 2024

Preprint

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We propose novel spectrometer designs that aim to enhance the measured spectral range 1 of ions on a finite-sized detector. In contrast to the traditional devices that use uniform magnetic 2 field, in which the deflection of particles increases inversely proportional to their momentum, in a 3 gradient magnetic field, the deflection of particles will be decreased due to the reduction of the 4 magnetic field along their propagation. Low energy ions are particularly impacted, as they are 5 deflected less and are more likely to reach the detector compared to being driven out of it while 6 using a uniform magnetic field. By the means of a gradient magnetic field, the nonlinear dispersion 7 of ions in a homogeneous magnetic field can approach a nearly linear dispersion. Nonetheless, 8 the dispersion of low energy ions in a homogeneous magnetic field remains unnecessarily high. 9 In this article, we explore linear, quadratic, and higher-order field profiles in comparison to the 10 homogeneous field case. We discuss the employed methodology and present simulation results of 11 the spectrometer with an extended ion spectral range, focusing on the minimum detectable energy 12 (energy dynamic range) and energy resolution

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Section: Optimized Design For Proton Spectrum With 100 Mev Cut-off En...supporting

confidence: 58%

Section: Discussionmentioning

confidence: 81%

Novel Spectrometer Designs for Laser Driven Ion Acceleration

Morabito,

Nelissen,

Migliorati

et al. 2024

Preprint

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show abstract

“…one shot per 30 min at the PALS facility, as described in references 26,27 ). On the other hand, implementation of kHz sources of laseraccelerated protons has recently been reported [39][40][41][42] . However, to the best of our knowledge, repetitive laser-driven alpha particle sources have never been demonstrated.…”

Section: Resultsmentioning

confidence: 99%

A multi-MeV alpha particle source via proton-boron fusion driven by a 10-GW tabletop laser

et al. 2023

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Nuclear fusion between protons and boron-11 nuclei has undergone a revival of interest thanks to the rapid progress in pulsed laser technology. Potential applications of such reaction range from controlled nuclear fusion to radiobiology and cancer therapy. A laser-driven fusion approach consists in the interaction of high-power, high-intensity pulses with H- and B-rich targets. We report on an experiment exploiting proton-boron fusion in CN-BN targets to obtain high-energy alpha particle beams (up to 5 MeV) using a very compact approach and a tabletop laser system with a peak power of ~10 GW, which can operate at high-repetition rate (up to 1 kHz). The secondary resonance in the cross section of proton-boron fusion (~150 keV in the center-of-mass frame) is exploited using a laser-based approach. The generated alpha particles are characterized in terms of energy, flux, and angular distribution using solid-state nuclear-track detectors, demonstrating a flux of ~105 particles per second at 10 Hz, and ~106 per second at 1 kHz. Hydrodynamic and particle-in-cell numerical simulations support our experimental findings. Potential impact of our approach on future spread of ultra-compact, multi-MeV alpha particle sources driven by moderate intensity (1016-1017 W/cm2) laser pulses is anticipated.

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“…From the measured number of particles in the ion spectra (figures 3(b), (d), and 4(b)) and the measured divergence of the proton beam of 5 • (see [38]), one can derive the spectral energy content in the proton beam. The assumption that the divergence of the proton beam is the same for all target thicknesses is rather conservative as the proton beam divergence may increase as the target thickness decreases.…”

Section: Conversion Efficiencymentioning

confidence: 99%

Ion acceleration with few-cycle relativistic laser pulses from foil targets

Ter‐Avetisyan

Varmazyar

Singh

et al. 2023

Plasma Phys. Control. Fusion

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Ion acceleration resulting from the interaction of 11 fs laser pulses of ~35 mJ energy with ultrahigh contrast (<10^-10), and 10^19 W/cm^2 peak intensity with foil targets made of various materials and thicknesses at normal (0◦) and 45◦ laser incidence is investigated. The maximum energy of the protons reached ~1.4 MeV accelerated in laser propagation direction and ~1.2 MeV in opposite direction from formvar target. An energy conversion efficiency from the laser to the proton beam is estimated to be as high as ~1.4 % at 45◦ laser incidence using a 51 nm-thick Al target. The high laser contrast indicates the predominance of vacuum heating via the Brunel’s effect as an absorption mechanism involving a tiny pre-plasma at the target front. Experimental results are in reasonable agreement with theoretical estimates where proton acceleration from the target front side into the backward direction is well explained by the Coulomb explosion of a charged cavity formed in a tiny preplasma, while forward proton acceleration is likely to be a two-step process: protons are first accelerated at a the target front side cavity and then further boosted in energy through the target back side via TNSA mechanism.

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Low divergent MeV-class proton beam with micrometer source size driven by a few-cycle laser pulse

Cited by 7 publications

References 52 publications

Novel Spectrometer Designs for Laser Driven Ion Acceleration

Novel Spectrometer Designs for Laser Driven Ion Acceleration

A multi-MeV alpha particle source via proton-boron fusion driven by a 10-GW tabletop laser

Ion acceleration with few-cycle relativistic laser pulses from foil targets

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