Schubert, S.; Barday, R.; Kamps, T.; Quast, T.; Siewert, F.; Varykhalov, A.; Nietubyc, R.; Smedley, J.; Weinberg, G.: Investigation of Laser-Cleaning Process on lead Photocathodes. In: Proceedings of IPAC 2012, New Orleans, Louisiana, USA. , 2012. - ISBN 978-3-95450-115-1, p. 1515-1517
http://accelconf.web.cern.ch/accelconf/IPAC2012/papers/tuppd050.pdf

Abstract:
To vreify the process of laser-cleaning on metal cathodes we performed a combined photoemission (PE) and scanning electron microscope (SEM) study. We followed the laser-cleaning procedure on thin Lead films arc-deposited on Mo-substrates by means of photoemission in the photon energy range of 16 - 140 eV and determined the sureface roughness before and after laser irradiation with wihite-ligth-interferometry.