1. Th. Tschenscher, G. Materlik, TESLA Technical Design Report, Part V, The X-Ray Free Electron Laser, DESY, Hamburg, 2002; see also http://www-hasylab.desy.de/facility/fel
2. See the website http://www-ssrl.slac.stanford.edu/LCLS/ for information on the LCLS facility
3. S. Atzeni, J. Meyer-ter-Vehn, The Physics of Inertial Fusion (Clarendon Press, Oxford, 2004)
4. R.W. Lee et al., J. Opt. Soc. Am. B 20, 770 (2003)
5. S.J. Moon, K.B. Fournier, H. Scott, H.K. Chung, R.W. Lee, J. Quant. Spec. Rad. Transfer 81, 311 (2003)