# New class of violation of local constant field approximation in intense crossed laser pulse scenarios

13 Mar 2020 Raicher E. Lv Q. Z. Keitel C. H. Hatsagortsyan K. Z.

It is commonly assumed that in ultrastrong laser fields, when the strong field parameter of the laser field $\xi$ is larger than one, the electron radiation is well described by the local constant field approximation (LCFA). We discuss the failure of this conjecture, considering radiation of an ultrarelativistic electron interacting with strong counterpropagating laser waves... (read more)

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• PLASMA PHYSICS
• HIGH ENERGY PHYSICS - PHENOMENOLOGY