Pulsed laser deposition of yttrium photocathode suitable for use in radio-frequency guns

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]
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.

Trovo, M.Elettra Sincrotrone Trieste, Italy (författare)
Demidovich, A.Elettra Sincrotrone Trieste, Italy (författare)
Cinquegrana, P.Elettra Sincrotrone Trieste, Italy (författare)
Gontad, F.University of Salento, Italy; Ist Nazl Fis Nucl, Italy (författare)
Broitman, EstebanLinköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska fakulteten(Swepub:liu)broes27 (författare)
Chiadroni, E.Ist Nazl Fis Nucl, Italy (författare)
Perrone, A.University of Salento, Italy; Ist Nazl Fis Nucl, Italy (författare)
University of Salento, Italy; Ist Nazl Fis Nucl, ItalyElettra Sincrotrone Trieste, Italy (creator_code:org_t)

Av författaren/redakt...: Lorusso, A.; Trovo, M.; Demidovich, A.; Cinquegrana, P.; Gontad, F.; Broitman, Esteba ...; visa fler...; Chiadroni, E.; Perrone, A.; visa färre...

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