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Pulsed laser deposition of yttrium photocathode suitable for use in radio-frequency guns
University of Salento, Italy; Ist Nazl Fis Nucl, Italy.
Elettra Sincrotrone Trieste, Italy.
Elettra Sincrotrone Trieste, Italy.
Elettra Sincrotrone Trieste, Italy.
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2017 (English)In: Applied Physics A: Materials Science & Processing, ISSN 0947-8396, E-ISSN 1432-0630, Vol. 123, no 12, article id 779Article in journal (Refereed) Published
Abstract [en]

Yttrium (Y) thin film was grown by pulsed laser deposition (PLD) on a copper (Cu) polycrystalline substrate. Ex situ morphological and structural characterisations of the circular Y film of 1.2 mu m thickness and 3 mm diameter have shown a very low droplet density on the film surface and a crystalline feature with a preferred orientation along the Y (100) plane. Moreover, Y thin film resulted in being very adherent to the Cu substrate and more scratch resistant than Cu bulk. A twin thin film was deposited also on a Cu backflange of a radio-frequency (RF) gun to test the suitability of the metallic thin film as photocathode. It was observed that the Y-coated photocathode was characterised by a quantum efficiency (QE) higher than that of the Cu bulk photocathode even if the presence of space charge effects didnt allow deriving the absolute maximum value of QE of Y photocathode.

Place, publisher, year, edition, pages
SPRINGER , 2017. Vol. 123, no 12, article id 779
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-143723DOI: 10.1007/s00339-017-1396-1ISI: 000416484200047OAI: oai:DiVA.org:liu-143723DiVA: diva2:1166742
Note

Funding Agencies|Italian National Institute of Nuclear Physics (INFN); Italian Ministry of Research [RBFR12NK5K]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]

Available from: 2017-12-15 Created: 2017-12-15 Last updated: 2017-12-15

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Department of Physics, Chemistry and BiologyFaculty of Science & Engineering
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CiteExportLink to record
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  • apa
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  • Other style
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