Visa Ib: Ultra-high Bandwidth, High Gain Sase Fel
نویسندگان
چکیده
We report the results of a high energy spread SASE FEL experiment, the intermediary experiment linking the VISA I and VISA II projects. A highly chirped beam (1.7 %) was transported, without corrections of longitudinal aberrations in the ATF dogleg, and injected into the VISA undulator. The ouput radiation displayed an uncharacteristicly large bandwidth (12 %) with extremely stable lasing and measured energy of about 2 μJ . Start-to-end simulations reproduced key features of the experiment and provided an insight into the michanisms giving rise to such a high bandwidth. These analyses have important implications on the VISA II experiment.
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