The structure of the singularity that is formed in a relativistically large amplitude plasma wave close to the wave breaking limit is found by using a simple waterbag electron distribution function. The electron density distribution in the breaking wave has a typical “peakon” form. The maximum value of the electric ﬁeld in a thermal breaking plasma is obtained and compared to the cold plasma limit. The results of computer simulations for different initial electron distribution functions are in agreement with the theoretical conclusions. The after-wavebreak regime is then examined, and a semi-analytical model of the density evolution is constructed. Finally the results of two dimensional particle in cell simulations for different initial electron distribution functions are compared, and the role of thermal effects in enhancing particle injection is noted.
|Autori interni:||CALIFANO, FRANCESCO|
|Autori:||Bulanov SV; Esirkepov TZh; Kando M; Koga JK; Pirozhkov AS; Nakamura T; Bulanov SS; Schroeder CB; Esarey E; Califano F; Pegoraro F|
|Titolo:||On the breaking of a plasma wave in a thermal plasma. I. The structure of the density singularity|
|Anno del prodotto:||2012|
|Digital Object Identifier (DOI):||10.1063/1.4764052|
|Appare nelle tipologie:||1.1 Articolo in rivista|