Detection and Characterization of GeV-class electrons from nonlinear laser wakefield

Recently, monoenergetic electron beams are obtained with intense, short-pulse laser interacting with tenuous (underdense), a few centimeters plasma via laser wakefield acceleration (LWFA) mechanism. Almost all the experiments utilize relatively long focal length focusing devices, of which the F-numbers (ratio of the focal length to the laser diameter) more than 10. We investigated experimentally highly nonlinear regime. The nonlinear regime is not well explored recently and the benefits of the nonlinear regime might be its high gradient and a capability to accelerate high current electrons.
5th Asia Pacific Conference on Plasma Physics