title: High-power γ-ray flash generation in ultraintense laser-plasma interactions.
abstract: When high-intensity laser interaction with matter enters the regime of dominated radiation reaction, the radiation losses open the way for producing short pulse high-power γ-ray flashes. The γ-ray pulse duration and divergence are determined by the laser pulse amplitude and by the plasma target density scale length. On the basis of theoretical analysis and particle-in-cell simulations with the radiation friction force incorporated, optimal conditions for generating a γ-ray flash with a tailored overcritical density target are found.
authors.affiliation: Kansai Photon Science Institute, Japan Atomic Energy Agency, Kizugawa, Kyoto, Japan 6190215.
authors.forename: Tatsufumi
authors.initials: T
authors.lastname: Nakamura
authors.forename: James K
authors.initials: JK
authors.lastname: Koga
authors.forename: Timur Zh
authors.initials: TZh
authors.lastname: Esirkepov
authors.forename: Masaki
authors.initials: M
authors.lastname: Kando
authors.forename: Georg
authors.initials: G
authors.lastname: Korn
authors.forename: Sergei V
authors.initials: SV
authors.lastname: Bulanov
mesh_terms: D003198:Computer Simulation; D005720:Gamma Rays; D007834:Lasers; D008962:Models, Theoretical; D058626:Plasma Gases
chemical_list: D058626:Plasma Gases