Soft x-ray free electron laser microfocus for exploring matter under extreme conditions.
作者信息
Nelson A J, Toleikis S, Chapman H, Bajt S, Krzywinski J, Chalupsky J, Juha L, Cihelka J, Hajkova V, Vysin L, Burian T, Kozlova M, Fäustlin R R, Nagler B, Vinko S M, Whitcher T, Dzelzainis T, Renner O, Saksl K, Khorsand A R, Heimann P A, Sobierajski R, Klinger D, Jurek M, Pelka J, Iwan B, Andreasson J, Timneanu N, Fajardo M, Wark J S, Riley D, Tschentscher T, Hajdu J, Lee R W
机构信息
LawrenceLivermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA.
出版信息
Opt Express. 2009 Sep 28;17(20):18271-8. doi: 10.1364/OE.17.018271.
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.
Zotero 插件