Study on laser-driven electron acceleration at Osaka University

Laser wake-field acceleration (LWFA) is expected to be basis for a novel technology allowing to downsize high-energy particle accelerators into tabletop-size due to ultra-high-gradient acceleration fields in laser driven plasma waves. Nowadays, the topmost goal of LWFA researches is beam control and repeatable/stable generation on a state of the art level of conventional accelerators. In this paper, updated achievements of our recent activity on the staging LWFA aiming at practical accelerator devices are summarized. (author)