Acceleration of high charge ion beams with achromatic divergence by petawatt laser pulses
Physical Review Accelerators and Beams, 2020•APS
We present a study of laser-ion acceleration, where an increased laser spot size leads to
sheath field geometries that accelerate ion beams of narrow and achromatic divergence at
unprecedented charge densities, resulting from the high aspect ratio of the laser spot size to
the acceleration distance. Matching the laser pulse length to the transverse laser spot size
mitigated laser sweeping across the target front side and optimized the acceleration, with
maximum energies deviating significantly from a linear intensity scaling.
sheath field geometries that accelerate ion beams of narrow and achromatic divergence at
unprecedented charge densities, resulting from the high aspect ratio of the laser spot size to
the acceleration distance. Matching the laser pulse length to the transverse laser spot size
mitigated laser sweeping across the target front side and optimized the acceleration, with
maximum energies deviating significantly from a linear intensity scaling.
We present a study of laser-ion acceleration, where an increased laser spot size leads to sheath field geometries that accelerate ion beams of narrow and achromatic divergence at unprecedented charge densities, resulting from the high aspect ratio of the laser spot size to the acceleration distance. Matching the laser pulse length to the transverse laser spot size mitigated laser sweeping across the target front side and optimized the acceleration, with maximum energies deviating significantly from a linear intensity scaling.
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