Pulsed laser deposition of yttrium photocathode suitable for use in radio-frequency guns
| Autor: | Alessio Perrone, Esteban Broitman, F. Gontad, A. Lorusso, M. Trovo, Enrica Chiadroni, Alexander Demidovich, Paolo Cinquegrana |
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| Přispěvatelé: | Lorusso, A., Trovã², M., Demidovich, A., Cinquegrana, P., Gontad, F., Broitman, E., Chiadroni, E., Perrone, A. |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
010308 nuclear & particles physics business.industry Chemistry (all) chemistry.chemical_element 02 engineering and technology General Chemistry Substrate (electronics) Yttrium 021001 nanoscience & nanotechnology 01 natural sciences Space charge Photocathode Pulsed laser deposition chemistry 0103 physical sciences Optoelectronics General Materials Science Quantum efficiency Crystallite Materials Science (all) Thin film 0210 nano-technology business |
| Popis: | 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 µm 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 didn’t allow deriving the absolute maximum value of QE of Y photocathode. |
| Databáze: | OpenAIRE |
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