FIG. 1.

(a) TONIX 3D technical drawing, front side view. The schematics of the beam splitting and the MCP mounts are also displayed. A ruler is plotted on the right side to display the TONIX size. The green arrow represents the electric field vector $\overrightarrow{E}$ of the incoming x-ray pulse, and θ is the angular deviation from the vertical or horizontal axis. (b) Nb mirror s- and p-polarization reflectivity and extinction ratio at a fixed angle of incidence of 42° in the range 60–75 eV, corresponding to the M_2,3 edge in Ni. (c) Scheme of the time-resolved experiment setup at the MagneDyn beamline at FERMI FEL (Trieste, Italy). The angles of incidence of the FEL probe and of the laser pump are, respectively, 45° and 43.5°. The pump laser photon energy is 1.56 eV (794 nm). The FEL and the laser spot sizes are approximately 100 μm in sigma, but be reduced down to 15 μm.²² The laser pump fluence ranges from 0.15 to 63 mJ/cm².