Tight comparison of Mg and Y thin film photocathodes obtained by the pulsed laser deposition technique
2016 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 836, 57-60 p.Article in journal (Refereed) Published
In this work Magnesium (Mg) and Yttrium (Y) thin films have been deposited on Copper (Cu) polycrystalline substrates by the pulsed laser ablation technique for photocathode application. Such metallic materials are studied for their interesting photoemission properties and are proposed as a good alternative to the Cu photocathode, which is generally used in radio-frequency guns. Mg and Y films were uniform with no substantial differences in morphology; a polycrystalline structure was found for both of them. Photoemission measurements of such cathodes based on thin films were performed, revealing a quantum efficiency higher than Cu bulk. Photoemission theory according to the three-step model of Spicer is invoked to explain the superior photoemission performance of Mg with respect to Y. (C) 2016 Elsevier B.V. All rights reserved.
Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2016. Vol. 836, 57-60 p.
Mg and Y thin films; Pulsed laser deposition; Metallic photocathodes
Other Physics Topics
IdentifiersURN: urn:nbn:se:liu:diva-132505DOI: 10.1016/j.nima.2016.08.049ISI: 000385601400008OAI: oai:DiVA.org:liu-132505DiVA: diva2:1046510
Funding Agencies|Italian National Institute of Nuclear Physics (INFN); Italian Ministry of Research in the framework of FIRB - Fondo per gli Investimenti della Ricerca di Base [RBFR12NK5K]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009-00971]2016-11-142016-11-132016-11-14