Author:
Schäfer Bernd,Flöter Bernhard,Mey Tobias,Mann Klaus
Abstract
AbstractThe first part of this chapter comprises setups and results of the determination of wavefront and beam parameters for different EUV sources (free-electron lasers, HHG-sources, synchrotron radiation) by self supporting Hartmann-Sensors. We present here i.a. a sensor applied for alignment of the ellipsodial mirror at FLASH beamline 2, yielding a reduction of the rms-wavefront aberrations by more than a factor of 3. In the second part we report on the characterization of the Free-Electron-Laser FLASH at DESY by a quantitative determination of the Wigner distribution function. The setup, comprising an ellipsodial mirror and a moveable extreme UV sensitive CCD detector, enables the mapping of two-dimensional phase space corresponding to the horizontal and vertical coordinate axes, respectively. Furthermore, an extended setup utilizing a torodial mirror for complete 4D-Wigner reconstruction has been accomplished and tested using radiation from a multimode Nd:VO4 laser.
Publisher
Springer International Publishing
Reference26 articles.
1. Iso 15367: Lasers and laser-related equipment—test methods for determination of the shape of a laser beam wavefront (2003)
2. Cubalchini, R.: Modal wave-front estimation from phase derivative measurements. JOSA 69(7), 972–977 (1979)
3. Noll, R.J.: Phase estimates from slope-type wave-front sensors. JOSA 68(1), 139–140 (1978)
4. Mercère, P., Zeitoun, P., Idir, M., Le Pape, S., Douillet, D., Levecq, X., Dovillaire, G., Bucourt, S., Goldberg, K.A., Naulleau, P.P., et al.: Hartmann wave-front measurement at 13.4 nm with $$\lambda $$ euv/120 accuracy. Opt. Lett. 28(17), 1534–1536 (2003)
5. Schäfer, B., Lübbecke, M., Mann, K.: Hartmann-shack wave front measurements for real time determination of laser beam propagation parameters. Rev. Sci. Instrum. 77(5), 053,103 (2006)