2026年
03/19
開催
開催日時
2026/03/19（木）15:30〜16:10
開催場所
3号館5階会議室 + zoom
講演者
Tomonao Hosokai (The Univ. of Osaka)
Zhan Jin (The Univ. of Osaka)
言語
日本語
詳細ページ
お問い合わせ
吉田 光宏 (PHS 4695)
Laser wakefield acceleration (LWFA) has long promised compact high energy accelerators, yet achieving stable and monoenergetic electron beams at the few hundred MeV level has remained a central challenge for advancing toward multi stage acceleration. In this seminar, we present the results on the generation of highly stable, reproducible, and quasi-monoenergetic electron beams in the several hundred MeV range by combining a compact 0.8 J laser system with precise control of plasma density profiles, injection conditions, and laser wavefront stability. This achievement represents a critical milestone for realizing staged LWFA and for scaling electron energies well beyond the limits of single stage operation. Using these high quality beams, we further verified their applicability by driving a free electron laser (FEL), achieving exponential gain at a wavelength of 40 nm. A start to end simulation framework incorporating acceleration, transport, and FEL processes shows good agreement with experimental diagnostics. The demonstrated beam stability and quality establish a foundation for future high energy multi stage LWFA systems and mark a significant step toward compact accelerators and light sources.