1. Soft x-ray free electron laser microfocus for exploring matter under extreme conditions.
- Author
-
Nelson AJ, Toleikis S, Chapman H, Bajt S, Krzywinski J, Chalupsky J, Juha L, Cihelka J, Hajkova V, Vysin L, Burian T, Kozlova M, Fäustlin RR, Nagler B, Vinko SM, Whitcher T, Dzelzainis T, Renner O, Saksl K, Khorsand AR, Heimann PA, Sobierajski R, Klinger D, Jurek M, Pelka J, Iwan B, Andreasson J, Timneanu N, Fajardo M, Wark JS, Riley D, Tschentscher T, Hajdu J, and Lee RW
- Subjects
- Computer-Aided Design, Electrons, Equipment Design, Equipment Failure Analysis, Reproducibility of Results, Sensitivity and Specificity, Lasers, Lenses, Materials Testing instrumentation, Materials Testing methods, X-Ray Diffraction instrumentation, X-Ray Diffraction methods
- Abstract
We have focused a beam (BL3) of FLASH (Free-electron LASer in Hamburg: lambda = 13.5 nm, pulse length 15 fs, pulse energy 10-40 microJ, 5 Hz) using a fine polished off-axis parabola having a focal length of 270 mm and coated with a Mo/Si multilayer with an initial reflectivity of 67% at 13.5 nm. The OAP was mounted and aligned with a picomotor controlled six-axis gimbal. Beam imprints on poly(methyl methacrylate) - PMMA were used to measure focus and the focused beam was used to create isochoric heating of various slab targets. Results show the focal spot has a diameter of < or =1 microm. Observations were correlated with simulations of best focus to provide further relevant information.
- Published
- 2009
- Full Text
- View/download PDF