Characterization of high-energy electrons produced from the self-modulated laser wakefield acceleration

Summary form only given, as follows. Intense laser-plasma interactions can produce MeV-level high-energy electrons over a very short distance (mm) in various ways, and one of the laser-based acceleration mechanisms is the self-modulated laser wakefield acceleration (SM-LWFA). So far quite extensive researches on SM-LWFAs have been performed in several groups in the world, but there are still many questions that are not well understood. In order to investigate such questions, we have an experimental program. For the experiment, we use a 2 TW laser and a supersonic gas jet. The high energy electrons generated by the SM-LWFA are diagnosed by several techniques and some of the measured results are presented here. Especially, this presentation is focused on measurement and analysis of the spatial distribution of the high energy electrons generated by the SM-LWFA.