| Paper | Title | Page |
|---|---|---|
| TUPC19 | Design Study of THz & VUV Coherent Source by Laser Seedomg at UVSOR-II | 285 |
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Light source technologies based on laser seeding are under development at the UVSOR-II electron storage ring. In the past experiments, we have succeeded in generating coherent THz radiation with various spectral properties and coherent DUV radiation with various polarizations. We carried out these experiments by utilizing a part of the existing free electron laser system and an SR beam-line opened for users. Last year, we started a new five year project, which contains construction of new undulators and beam lines dedicated to the source developments and also upgrade of the laser system. We have designed the seeding laser system and the undulators based on numerical simulations. A spectrometer for VUV has been constructed. A seeding light source based on HHG is under development. In this presentation, we report the results from the design studies and the preliminary experiments. |
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| WEPC36 | Present Status and Upgrade Plan of the UVSOR-II Free Electron Laser | 576 |
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At the UVSOR storage ring, free electron laser (FEL) have been studied for more than a decade. After the upgrade of accelerator components in 2003, FEL lasing around 199 nm [1] has been achieved. In these years, several application experiments of the FEL in deep UV region have been carried out. A feedback alignment system of the optical resonator has been developed to improve long term stability of the laser power for user experiments. To promote application experiments more extensively, now we have two upgrade plans. One is FEL lasing with top-up operation in order to maintain a high beam current and then a high out-coupled power. The other is upgrade of the optical klystron to have higher gain at deep UV region. These two upgrades will allow us to attract more users to our FEL. [1] M. Hosaka, “Lasing below 200 nm at the UVSOR-II FEL,” UVSOR Activity Report 2007. |