THOB1 　加速器技術（粒子源）　 8月31日 13号館1326教室 9:00-9:20

Laser beam irregularities effect on Laser plasma acceleration electron beam generation stability

○Driss Oumbarek-espinos (Institute of Scientific and Industrial Research (SANKEN), Osaka University, Japan)

Since its inception Laser plasma acceleration (LPA) has gained traction as an alternative to classic RF accelerators. LPA offers high acceleration gradients (up to 10s of GeV/m) making possible the generation of GeV electrons in tens of cm. Multiple uses for LPA systems are already being seriously considered including their use as electron beam sources for Free Electron Laser. The generation of LPA based FEL has been recently demonstrated. However, achieving proper electron beam parameters for such use in a consistent manner and a reliable coupling with the undulator is non-trivial and still under research. Being able to provide a reliable and clean laser source for LPA is a key part to go towards industrial applications. One important issue lies with instabilities induced by imperfect laser beams with aberrations. It has already been shown that real laser beams, with poor focus quality, can be detrimental for electron generations. In this work the LPA based FEL LAPLACIAN facility is quickly introduced and then recent results on the research of the effects of aberrated laser on electron beam generation stability and parameters are presented.