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Relativistic positron beams are required for fundamental research in nonlinear strong field QED, plasma physics, and laboratory astrophysics. Positrons are difficult to create and manipulate due to their short lifetime, and their energy…

Plasma Physics · Physics 2023-02-08 B. Martinez , B. Barbosa , M. Vranic

Experimental results, supported by precise modelling, demonstrate optimisation of a plasma-based injector with intermediate laser pulse energy ($<1$ J), corresponding to a normalised vector potential $a_0 = 2.15$, using ionisation injection…

The plasma photocathode has previously been proposed as a source of ultra-high-brightness electron bunches within plasma accelerators. Here, the scheme is extended by using a radially-polarized ionizing laser pulse to generate high-charge,…

Accelerator Physics · Physics 2025-10-16 James Chappell , Emily Archer , Roman Walczak , Simon Hooker

The plasma wakefield amplitudes which could be achieved via the modulation of a long proton bunch are investigated. We find that in the limit of long bunches compared to the plasma wavelength, the strength of the accelerating fields is…

Accelerator Physics · Physics 2015-05-28 Allen Caldwell , Konstantin Lotov

An experimental investigation of collisionless shock ion acceleration is presented using a multicomponent plasma and a high-intensity picosecond duration laser pulse. Protons are the only accelerated ions when a near-critical-density plasma…

The radiation pressure acceleration (RPA) of charged particles has been considered a challenging task in laser particle acceleration. Laser-driven proton/ion acceleration has attracted considerable interests due to its underlying physics…

Monoenergetic ion bunch generation and acceleration from double layer thin foil target irradiated by intense linearly polarized (LP) laser pulse is investigated using two-dimensional (2D) particle-in-cell (PIC) simulations. The low-Z ions…

Plasma Physics · Physics 2012-01-17 Xin Wang , Wei Yu , Edison Liang

Laser-driven proton acceleration from novel cryogenic hydrogen target of the thickness of tens of microns irradiated by multiPW laser pulse is investigated here for relevant laser parameters accessible in near future. It is demonstrated…

Plasma Physics · Physics 2018-03-14 J. Psikal , M. Matys

Extreme laser pulses driving non-equilibrium processes in high density plasmas permit an increase of the fusion of hydrogen with the boron isotope 11 by nine orders of magnitude of the energy gains above the classical values. This is the…

Plasma Physics · Physics 2017-04-25 H. Hora , S. Eliezer , G. J. Kirchhoff , G. Korn , P. Lalousis , G. H. Miley , S. Moustaizis

A scheme to generate highly collimated $\gamma$-ray pulse is proposed for the production of muon and electron pairs in $\gamma-\gamma$ collider. The $\gamma$-ray pulse, with high conversion efficiency, can be produced as the result of…

Plasma Physics · Physics 2017-12-27 J. Q. Yu , R. H. Hu , Z. Gong , A. Ting , Z. Najmudin , D. Wu , H. Y. Lu , W. J. Ma , X. Q. Yan

Collisionless shock acceleration of protons and C$^{6+}$ ions has been achieved by the interaction of a 10$^{20}$ W/cm$^2$, 1 $\mu$m laser with a near-critical density plasma. Ablation of the initially solid density target by a secondary…

The acceleration of charged particles, producing collimated mono-energetic beams, over short distances holds the promise to offer new tools in medicine and diagnostics. Here, we consider a possible mechanism for accelerating protons to high…

Accelerator Physics · Physics 2015-06-04 A. Holkundkar , G. Brodin , M. Marklund

A target composition scheme to optimize the combined proton acceleration regime is presented and verified by two-dimensional particle-in-cell (2D PIC) simulations by using an ultra-intense circularly-polarized (CP) laser pulse irradiating…

Plasma Physics · Physics 2016-02-17 W. P. Yao , B. W. Li , C. Y. Zheng , Z. J. Liu , X. Q. Yan

We examine ion acceleration by irradiating a hundred TW laser pulse on a double-layer target. It is shown analytically and by three-dimensional particle-in-cell simulations that higher energy protons are obtained by using material with a…

Plasma Physics · Physics 2011-03-03 Toshimasa Morita , Sergei V. Bulanov , Timur Zh. Esirkepov , James Koga , Masaki Kando

Surface plasmon (SP) excitation in intense laser interaction with solid target can be exploited for enhancing secondary emissions, in particular efficient acceleration of high charge electron bunches. Previous studies have mostly used…

Plasma Physics · Physics 2022-07-07 J. Sarma , A. McIlvenny , N. Das , M. Borghesi , A. Macchi

Our proposed ion acceleration scheme, micronozzle acceleration (MNA), generates proton beams with extremely high kinetic energies on the giga-electron-volt (GeV) order. The underlying physics and performance of MNA are studied with…

Plasma Physics · Physics 2025-12-02 M. Murakami , D. Balusu , S. Maruyama , Y. Murakami , B. Ramakrishna

Motivated by rapid advances in plasma based accelerators, we propose a simple mechanism for the production of highly collimated quasi monochromatic electrons beams. By considering Compton scattering of electrons (in the plasma) with virtual…

Plasma Physics · Physics 2011-05-12 Ravindra Kumar , V. Ravishankar

A novel efficient scheme of acceleration and collimation of dense plasma is proposed and examined. In the proposed scheme, a target placed in a cavity at the entrance of a guiding channel is irradiated by a laser beam introduced into the…

We show efficient laser driven proton acceleration up to 14MeV from a 50 $\mu$m thick cryogenic hydrogen ribbon. Pulses of the short pulse laser ELFIE at LULI with a pulse length of $\approx$ 350 fs at an energy of 8 J per pulse are…

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