Figure 4
A comparison of the brightness as a function of the energy spread for zero and non-zero emittance at two different resonant photon energies (580 eV and 4000 eV, see text) and using different methods: equation (18) (blue circles), equation (17) (green diamonds), SPECTRA calculations (orange squares and red upwards triangles) and equation (22) (violet downwards triangles and brown empty circles). |