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We propose a new photocathode configuration which presents the quantum efficiency and work function of yttrium (Y) and at the same time preserves all of the advantages of copper (Cu) when inserted into a radio-frequency gun. The configuration consists of a disk of Y covered by a coating of Cu deposited using the pulsed laser ablation technique, while masking the central part of the Y disk by a shield making the photoemission directly from the Y bulk possible. The new device was characterised by scanning electron microscopy to deduce the morphology and by ...
Publication date: 
1 Jan 2013

A Lorusso, A Cola, F Gontad, I Koutselas, M Panareo, NA Vainos, A Perrone

Biblio References: 
Volume: 724 Pages: 72-75
Nuclear Instruments and Methods in Physics Research A