Abstract:
:Control of the collective response of plasma particles to intense laser light is intrinsic to relativistic optics, the development of compact laser-driven particle and radiation sources, as well as investigations of some laboratory astrophysics phenomena. We recently demonstrated that a relativistic plasma aperture produced in an ultra-thin foil at the focus of intense laser radiation can induce diffraction, enabling polarization-based control of the collective motion of plasma electrons. Here we show that under these conditions the electron dynamics are mapped into the beam of protons accelerated via strong charge-separation-induced electrostatic fields. It is demonstrated experimentally and numerically via 3D particle-in-cell simulations that the degree of ellipticity of the laser polarization strongly influences the spatial-intensity distribution of the beam of multi-MeV protons. The influence on both sheath-accelerated and radiation pressure-accelerated protons is investigated. This approach opens up a potential new route to control laser-driven ion sources.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Gonzalez-Izquierdo B,King M,Gray RJ,Wilson R,Dance RJ,Powell H,Maclellan DA,McCreadie J,Butler NMH,Hawkes S,Green JS,Murphy CD,Stockhausen LC,Carroll DC,Booth N,Scott GG,Borghesi M,Neely D,McKenna Pdoi
10.1038/ncomms12891subject
Has Abstractpub_date
2016-09-14 00:00:00pages
12891issn
2041-1723pii
ncomms12891journal_volume
7pub_type
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