Acceleration of high charge ion beams with achromatic divergence by petawatt laser pulses

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....

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Bibliographic Details
Published in:Physical review. Accelerators and beams 2020-02, Vol.23 (2), p.021302, Article 021302
Main Authors: Steinke, S., Bin, J. H., Park, J., Ji, Q., Nakamura, K., Gonsalves, A. J., Bulanov, S. S., Thévenet, M., Toth, C., Vay, J.-L., Schroeder, C. B., Geddes, C. G. R., Esarey, E., Schenkel, T., Leemans, W. P.
Format: Article
Language:English
Subjects:
Charge density
Divergence
High aspect ratio
high-energy-density plasmas
Ion beams
Ion charge
laboratory studies of space & astrophysical plasmas
laser driver ion acceleration
laser-plasma interactions
Lasers
particle acceleration in plasmas
PARTICLE ACCELERATORS
Sheaths
target normal sheath acceleration
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Summary: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.
ISSN:2469-9888
2469-9888
DOI:10.1103/PhysRevAccelBeams.23.021302