Figure 4
Spatial alignment of synchrotron and laser beams in the UHV photoemission experimental station. Panels (a) and (b) show the focal spots of laser and X-rays, respectively, as measured at the sample position by a CCD camera. X-rays are imaged on a YAG crystal and laser photons on a gold single-crystal surface. Beam profiles on the two orthogonal axis are reported in panels (c) and (d). |