Author/Authors :
Ohashi، نويسنده , , Haruhiko and Yabashi، نويسنده , , Makina and Tono، نويسنده , , Kensuke and Inubushi، نويسنده , , Yuichi and Sato، نويسنده , , Takahiro and Togashi، نويسنده , , Tadashi and Senba، نويسنده , , Yasunori and Koyama، نويسنده , , Takahisa and Yumoto، نويسنده , , Hirokatsu and Miyokawa، نويسنده , , Koya and Ohsawa، نويسنده , , Takumi and Goto، نويسنده , , Shunji and Ishikawa، نويسنده , , Tetsuya، نويسنده ,
Abstract :
Beamline mirrors and a monochromator were developed as key optical devices for the Japanese XFEL facility, SPring-8 Ångstrom Compact Free Electron Laser (SACLA). The optics were designed for transporting extremely intense, transversely coherent XFEL light to the experimental stations. The mirror system delivers a pink beam with high intensity and an energy range below 15 keV, while the monochromator with Si (1 1 1) covers wider energy range of 4–30 keV with 0.01% bandwidth. For realizing high stability and contamination-free environment, the mechanics of these optical components were designed to have high stiffness with ultra-high vacuum (UHV) compatibility. After 100 days of operation, no radiation damage was observed on the mirror surfaces.
Keywords :
X-ray free electron laser , X-Ray mirror , Double crystal monochromator , stability , Damage , Beam image
