Structural and morphological properties of metallic thin films grown by pulsed laser deposition for photocathode application

• Published in: Applied physics. A, Materials science & processing Vol. 122; no. 3; pp. 1 - 5
• Main Authors: Lorusso, A., Gontad, F., Caricato, A. P., Chiadroni, E., Broitman, E., Perrone, A.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2016
• Subjects: Characterization and Evaluation of Materials; Condensed Matter Physics; Droplets; Emerging trends in photo-excitations and promising new laser ablation technologies; Invited Paper; Lead (metal); Machines; Manufacturing; Materials Treatment; Nanotechnology; Operating Procedures; Optical and Electronic Materials; Photocathodes; Physics; Physics and Astronomy; Processes; Pulsed laser deposition; Radiofrequency; Roughness; Surfaces and Interfaces; Thin Films; Yttrium; Quantum Efficiency; Pulse Laser Deposition; Metallic Thin Film; Droplet Density; Laser Cleaning
• ISSN: 0947-8396; 1432-0630; 1432-0630
• DOI: 10.1007/s00339-016-9717-3

In this work yttrium and lead thin films have been deposited by pulsed laser deposition technique and characterized by ex situ different diagnostic methods. All the films were adherent to the substrates and revealed a polycrystalline structure. Y films were uniform with a very low roughness and droplet density, while Pb thin films were characterized by a grain morphology with a relatively high roughness and droplet density. Such metallic materials are studied because they are proposed as a good alternative to copper and niobium photocathodes which are generally used in radiofrequency and superconducting radiofrequency guns, respectively. The photoemission performances of the photocathodes based on Y and Pb thin films have been also studied and discussed.