2017/08/31 by J. A. Arteaga, A. Serbeto, J. T. Mendonça +2 · 3 citations
Physics and Astronomy · #Angular momentum #Angular momentum coupling #Angular momentum of light #Azimuthal quantum number #Dust and Plasma Wave Phenomena #Electron #Laser-Plasma Interactions and Diagnostics #Orbital angular momentum of light #Paraxial approximation #Plasma #Quantum chaos and dynamical systems #Radiation #Total angular momentum quantum number #physics.plasm-ph
paper · pdf · doi:10.1063/1.5002554
published in Physics of Plasmas 24(12) (American Institute of Physics)
arxiv created 2017/08/31 · openalex created_date 2017/09/15 · openalex publication_date 2017/12/01 · arxiv updated 2018/01/17 · openalex updated_date 2026/08/05
Using a quantum fluid model, a set of three paraxial coupled equations to describe the free-electron laser instability is derived. These equations are solved numerically considering Laguerre-Gaussian modes as the initial conditions to study the transfer of orbital angular momentum between them, which satisfies the total angular momentum conservation as matching condition. The amplification and compression of the output radiation is observed. Using the method of separation of variables, the set of coupled equations, which describes a π-pulse solution, is obtained in such a way that a transverse overlapping factor, R, governs the energy exchange efficiency of the process.