A quasi-monoenergetic short time duration compact proton source for probing high energy density states of matter

Apiñaniz, J. I.; Malko, S.; Fedosejevs, R.; Cayzac, W.; Vaisseau, X.; Luis, D. De; Gatti, G.; McGuffey, C.; Bailly-Grandvaux, M.; Bhutwala, Krish; Ospina-Bohorquez, V.; Balboa, J.; Santos, J. J.; Batani, D.; Beg, F. N.; Roso, L.; Pérez-Hernández, J. A.; Volpe, L.

doi:10.1038/s41598-021-86234-x

Cited by 14 publications

(10 citation statements)

References 37 publications

(28 reference statements)

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“…The main beam, with ≈ 4 J energy and a 30 fs duration, was focused onto a 3 μm thick aluminium foil in order to accelerate protons through the Target Normal Sheath Acceleration (TNSA) mechanism, resulting in a broadband spectrum 40 with a cut-off energy around 4 MeV. A specifically developed magnetic filtering device 41 was used to select a monoenergetic pencil-like proton beam of around 500 keV energy out of the initial spectrum to probe a target sample (solid or WDM state) located near the exit of the device. The proton beam diameter when entering the target was measured to be 50 μm using radiochromic films.…”

Section: Resultsmentioning

confidence: 99%

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Proton stopping measurements at low velocity in warm dense carbon

et al. 2022

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Ion stopping in warm dense matter is a process of fundamental importance for the understanding of the properties of dense plasmas, the realization and the interpretation of experiments involving ion-beam-heated warm dense matter samples, and for inertial confinement fusion research. The theoretical description of the ion stopping power in warm dense matter is difficult notably due to electron coupling and degeneracy, and measurements are still largely missing. In particular, the low-velocity stopping range, that features the largest modelling uncertainties, remains virtually unexplored. Here, we report proton energy-loss measurements in warm dense plasma at unprecedented low projectile velocities. Our energy-loss data, combined with a precise target characterization based on plasma-emission measurements using two independent spectroscopy diagnostics, demonstrate a significant deviation of the stopping power from classical models in this regime. In particular, we show that our results are in closest agreement with recent first-principles simulations based on time-dependent density functional theory.

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Section: Resultsmentioning

confidence: 99%

“…The design and the optimization of the energy selector are presented in detail in ref. 41 . In this work, we selected a proton beam with a central energy of 498 ± 4 keV and an energy bandwidth of 44 ± 4 keV at FWHM, where 4 keV is the total uncertainty for a single shot.…”

Section: Methodsmentioning

confidence: 99%

Proton stopping measurements at low velocity in warm dense carbon

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…The main beam, with ≈ 4 J energy and a 30 fs duration, was focused onto a 3 µm thick aluminium foil in order to accelerate protons through the Target Normal Sheath Acceleration (TNSA) mechanism, resulting in a broadband spectrum 40 with a cut-off energy around 4 MeV. A specifically developed magnetic filtering device 41 was used to select a monoenergetic pencil-like proton beam of around 500 keV energy out of the initial spectrum to probe a target sample (solid or WDM state) located near the exit of the device. The proton beam diameter when entering the target was measured to be 50 µm using radiochromic films.…”

Section: Methodsmentioning

confidence: 99%

“…The design and the optimization of the energy selector are presented in detail in Ref. 41 . In this work, we selected a proton beam with a central energy of 498 ± 4 keV and an energy bandwidth of 44 ± 4 keV at FWHM.…”

Section: Energy Selectormentioning

confidence: 99%

Proton stopping measurements at low velocity in warm dense carbon

Malko

Cayzac²,

Ospina-Bohorquez³

et al. 2021

Preprint

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Ion stopping in warm dense matter is a process of fundamental importance for the understanding of the properties of dense plasmas, the realization and the interpretation of experiments involving ion-beam-heated warm dense matter samples, and for inertial confinement fusion research. The theoretical description of the ion stopping power in warm dense matter is difficult notably due to electron coupling and degeneracy, and measurements are still largely missing. In particular, the low-velocity stopping range around the Bragg peak, that features the largest modeling uncertainties, remains virtually unexplored. Here, we report proton energy-loss measurements in warm dense plasma at unprecedented low projectile velocities, approaching significantly the Bragg-peak region. Our energy-loss data, combined with a precise target characterization based on plasma emission measurements using two independent spectroscopy diagnostics, demonstrate a significant deviation of the stopping power from classical models in this regime. In particular, we show that our results are consistent with recent first-principles simulations based on time-dependent density functional theory.

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“…Their spatial ( m) and temporal ( ps) compactness, along with their high current density ( A/cm ) 1 , make them an ideal ion source for conducting high-energy density science experiments. Laser-driven proton beams have had great success in the radiography of dense plasmas 2 , as well as generating and probing warm dense matter states 3 , 4 . The laser-acceleration of heavy-ion beams is of interest as well, for its ability to decrease the size and running cost of heavy-ion accelerators, and for the table-top production of rare isotopes 5 .…”

mentioning

confidence: 99%

A laser parameter study on enhancing proton generation from microtube foil targets

Strehlow

Kim

Bailly-Grandvaux

et al. 2022

Sci Rep

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The interaction of an intense laser with a solid foil target can drive $$\sim$$ ∼ TV/m electric fields, accelerating ions to MeV energies. In this study, we experimentally observe that structured targets can dramatically enhance proton acceleration in the target normal sheath acceleration regime. At the Texas Petawatt Laser facility, we compared proton acceleration from a $$1\, {\upmu }\hbox {m}$$ 1 μ m flat Ag foil, to a fixed microtube structure 3D printed on the front side of the same foil type. A pulse length (140–450 fs) and intensity ((4–10) $$\times 10^{20}$$ × 10 20 W/cm$$^2$$ 2 ) study found an optimum laser configuration (140 fs, 4 $$\times 10^{20}$$ × 10 20 W/cm$$^2$$ 2 ), in which microtube targets increase the proton cutoff energy by 50% and the yield of highly energetic protons ($$>10$$ > 10 MeV) by a factor of 8$$\times$$ × . When the laser intensity reaches $$10^{21}$$ 10 21 W/cm$$^2$$ 2 , the prepulse shutters the microtubes with an overcritical plasma, damping their performance. 2D particle-in-cell simulations are performed, with and without the preplasma profile imported, to better understand the coupling of laser energy to the microtube targets. The simulations are in qualitative agreement with the experimental results, and show that the prepulse is necessary to account for when the laser intensity is sufficiently high.

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A quasi-monoenergetic short time duration compact proton source for probing high energy density states of matter

Cited by 14 publications

References 37 publications

Proton stopping measurements at low velocity in warm dense carbon

Proton stopping measurements at low velocity in warm dense carbon

Proton stopping measurements at low velocity in warm dense carbon

A laser parameter study on enhancing proton generation from microtube foil targets

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