Abstract

Photoelectron Spectroscopy (PES) covers a very broad range of measurements, disciplines, and interests. The present emphasis will be on actinide materials but the same arguments can apply to any part of the periodic table and indeed to other disciplines such as surface, atomic, and molecular studies. Almost the entire spectrum of PES measurements will benefit greatly from the development of the XUV-FEL. As the next generation light source, the FEL will result in improvements over the undulator that are larger than the undulater improvements over bending magnets. The combination of high flux and high inherent resolution will result in several orders of magnitude gain in signal to noise over measurements using synchrotron-based undulators. The latter still require monochromators. Their resolution is invariably strongly energy-dependent so that in the regions of interest for many experiments (hν > 100 eV) they will not have a resolving power much over 1000. In order to study some of the interesting phenomena in actinides (heavy fermions e.g.) one would need resolving powers of 10⁴ to 10⁵. These values are only reachable with the FEL.

© 1988 Optical Society of America