English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A scheme with gold cone-capillary is proposed to improve the protonsacceleration and involved problems are investigated by using thetwo-dimensional particle-in-cell simulations. It is demonstrated that thecone-capillary can efficiently guide and collimate the protons to a longerdistance and lead to a better beam quality with a dense density $\geq10n_c$,monoenergetic peak energy $E_k \sim 1.51~\mathrm{GeV}$, spatial emittance$\sim0.0088~\mathrm{mm}~\mathrm{mrad}$ with divergence angle $\theta \sim1.0^{\circ}$ and diameter $\sim 0.5\mathrm{\mu m}$. The enhancement is mainlyattributed to the focusing effect by the transverse electric field generated bythe cone as well as the capillary, which can prevent greatly the protons fromexpanding in the transverse direction. Comparable to without the capillary, theprotons energy spectra have a stable monoenergetic peak and divergence anglenear to $1.0^{\circ}$ in longer time. Besides, the efficiency of accelerationdepending on the capillary length is explored, and the optimal capillary lengthis also achieved. Such a target may be benefit to many applications such asions fast ignition in inertial fusion, proton therapy in medicine and so on.

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