Innovative photocathodes based on nanodiamond layers.

Velardi L., Nassisi V., Turco V., Monteduro L., Caricato A.P., Cicala G.

VI - Fisica applicata, acceleratori e beni culturali
Aula 29C-2 - Giovedì 20 h 09:00 - 13:00
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Two different photocathodes (PCs) based on nanodiamonds (NDs) have been realized at the MWPECVD Laboratory of CNR-NANOTEC of Bari. Each PC consisted of layers of untreated or hydrogenated ND particles of 250 nm deposited on p-doped silicon substrate by means of pulsed spray technique. The quantum efficiency (QE) of the cathodes has been assessed at the UV wavelength of a KrF laser, $i.e.$, 248 nm. The laser energy used for the irradiation ranged from $10^{-3}$ to $10^{-2}$ J/cm${}^{2}$. The ND photocathodes exhibited QE values higher than those obtained by conventional Cu ones.

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