Published in

American Institute of Physics, Physics of Plasmas, 3(24), p. 033122

DOI: 10.1063/1.4978953

Links

Tools

Export citation

Search in Google Scholar

Enhanced laser radiation pressure acceleration of protons with a gold cone-capillary

This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Green circle
Preprint: archiving allowed
Green circle
Postprint: archiving allowed
Orange circle
Published version: archiving restricted
Data provided by SHERPA/RoMEO

Abstract

A scheme with gold cone-capillary is proposed to improve the protons acceleration and involved problems are investigated by using the two-dimensional particle-in-cell simulations. It is demonstrated that the cone-capillary can efficiently guide and collimate the protons to a longer distance and lead to a better beam quality with a dense density $≥10n_c$, monoenergetic peak energy $E_k ∼ 1.51~\mathrm{GeV}$, spatial emittance $∼0.0088~\mathrm{mm}~\mathrm{mrad}$ with divergence angle $\theta ∼ 1.0^{∘}$ and diameter $∼ 0.5\mathrm{\mu m}$. The enhancement is mainly attributed to the focusing effect by the transverse electric field generated by the cone as well as the capillary, which can prevent greatly the protons from expanding in the transverse direction. Comparable to without the capillary, the protons energy spectra have a stable monoenergetic peak and divergence angle near to $1.0^{∘}$ in longer time. Besides, the efficiency of acceleration depending on the capillary length is explored, and the optimal capillary length is also achieved. Such a target may be benefit to many applications such as ions fast ignition in inertial fusion, proton therapy in medicine and so on. ; Comment: 16 pages, 10 figures