[9a-S223-1~9] 7.2 Applications and technologies of electron beams

△ [9a-S223-6] Development of tip-emitter-based electron source driven by femtosecond laser

〇Yuuki Uesugi¹, Watanabe Kazuki¹, Sato Shunichi¹ (1.IMRAM, Tohoku Univ.)

Keywords:Ultrafast Electron Microscopy, Femtosecond laser, High fields physics

We are developing an ultrafast electron source, which can emitt electron bunches synchronized with femtosecond laser pulses, in order to observe nonlinear phenomena caused by free electrons in the high-intensity electromagnetic field. An electron source which possesses high spatial coherence and the sub-picosecond time structure is constructed by irradiating the tip emitter of a Schottky-type electron gun with a focused femtosecond laser beam. In the presentation, we will report the details of the developed electron source and the laser system, and the results of their performances.