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Acceleration of copper ions from ultra-thin targets by a short pulse laser (30fs) with intensity of 1020 W/cm2 were systematically studied using two-dimensional relativistic Particle-in-Cell code EPOCH2D1, which includes an ionization module. It was found that ionization dynamics play an important role in heavy ion acceleration, particularly in the generation of quasi-mono-energetic ion bunches. These...
Proton beams driven from short pulse lasers can deposit their energy in material with exceptionally high intensity and drive rapidly evolving plasma conditions and dynamic currents which lead to previously-unseen proton stopping and transport behavior. These effects, such as extended range and narrowing of the heated plasma volume, become more prominent as the beam energy and pulse length increase.
Energetic proton beams driven by picosecond lasers can be focused to densities ∼1024 m−3 in vacuum, but complications arise as it enters solid material. We report evidence of a strong material dependence on the volume heated.
Generation of heavy ion beams from solid targets irradiated by intense short laser pulses is studied. The interest is driven by the ion beam's potential for many groundbreaking applications in scientific, technological, and medical areas [1,2]. Numerical modeling using relativistic implicit Particle-in-Cell (PIC) code has been performed to study mechanisms of heavy ion acceleration. The study aims...
Recent experiments and simulations of proton generation and focusing in cone geometries have led to a better understanding of the important effects of the electric fields in and around the focused beam.1 The surrounding cone structure is shown to improve the focusing significantly, resulting in beam fluence diameters ≈ 55µm for protons with energies Ep >3 MeV. PIC-hybrid simulations predict that...
We report on generation of relativistic electron beams in the wake of a relativistically intense laser pulse traversing a 1.7mm long atmospheric density helium gas jet. The plasma wake structure is recovered using a Frequency-Domain Holography (FDH) and Frequency-Domain Shadowgraphy (FDS). As the gas density changes, the accelerated electron beams show variations in cross-section area, divergence,...
X-rays generated by 0.1 - 0.5 GeV electron beams generated using a 100 TW laser are shown to have a low emittance, be spatially coherent and have a peak brightness comparable to 3rd generation synchrotron sources.
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