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Collimated proton acceleration in light sail regime with a tailored pinhole target

Author:
Wang, H. Y.  Yan, X. Q.  Zepf, M.  


Journal:
PHYSICS OF PLASMAS


Issue Date:
2014


Abstract(summary):

A scheme for producing collimated protons from laser interactions with a diamond-like-carbon + pinhole target is proposed. The process is based on radiation pressure acceleration in the multi-species light-sail regime [B. Qiao et al., Phys. Rev. Lett. 105, 155002 (2010); T. P. Yu et al., Phys. Rev. Lett. 105, 065002 (2010)]. Particle-in-cell simulations demonstrate that transverse quasistatic electric field at TV/m level can be generated in the pinhole. The transverse electric field suppresses the transverse expansion of protons effectively, resulting in a higher density and more collimated proton beam compared with a single foil target. The dependence of the proton beam divergence on the parameters of the pinhole is also investigated. (C) 2014 AIP Publishing LLC.


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