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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Coherent transition radiation (CTR) from relativistic electron beaminteraction with an overdense plasma foil is investigated by making use oftwo-dimensional particle-in-cell simulations. Well-defined single electron beameither of uniform profile or having substructures is considered for variousbeam-plasma parameters. The main purpose is to mimic the complicatedbeam-plasma conditions that is often found, for example, in intense laserplasma interactions. Key properties of the CTR concerning their temporal,angular and spectral profiles are identified. Several saturation effects due tothe beam energy, size and foil density are found for the CTR energy, and thedependences vary for different spectral components such as in the Terahertz(THz) and optical range. The detailed substructure of the beam also affectsgreatly the radiation generation, leading to distinctive high harmoniccomponents. Electrons with kinetic energy from sub MeV to tens of GeV areexplored. For few MeV electron beams, the effects of the foil plasma on thebeam dynamics and associated CTR generation, resembles closely the CTR from hotelectrons produced in intense laser-plasma interactions. These results may findimportant applications in beam diagnostics either in laser-plasma basedacceleration or conventional accelerators. They may also be employed to designnovel THz radiation sources using tunable electron beams.

Coherent Transition Radiation from Relativistic Beam-Foil Interaction in the Terahertz and Optical Range