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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ayouchi, R.
Laboratoire Analyse, Géométrie et Applications
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2014Tungsten trioxide nanostructured electrodes for organic dye sensitised solar cellscitations
- 2013Optical properties of lead-free NKN films from transmission and spectral ellipsometrycitations
- 2012Complex dielectric function in lead-free NKN filmscitations
- 2012Transfer characteristic of zinc nitride based thin film transistorscitations
- 2012Development of lead-free materials for piezoelectric energy harvestingcitations
- 2012Secondary electron emission yield (SEY) in amorphous and graphitic carbon films prepared by PLDcitations
- 2010Local electromechanical properties of ZnO thin films and microcrystals
- 2010Optical properties of TiO(2) thin films prepared by chemical spray pyrolysis from aqueous solutionscitations
- 2010Local piezoelectric properties of ZnO thin films prepared by RF-plasma-assisted pulsed-laser deposition methodcitations
- 2010RF-plasma assisted PLD growth of Zn3N2 thin filmscitations
- 2009Morphological and optical properties of silicon thin films by PLDcitations
- 2008Study of trap states in zinc oxide (ZnO) thin films for electronic applicationscitations
- 2007ZnO films grown by laser ablation with and without oxygen CVDcitations
- 2007Photoinduced excess carrier dynamics in PLD-grown ZnOcitations
- 2001Electrochemical properties of lead oxide films obtained by spray pyrolysis as negative electrodes for lithium secondary batteriescitations
- 2000Compositional, structural and electrical characterization of barium titanate thin films prepared on fused silica and Si(111) by spray pyrolysis
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document
Secondary electron emission yield (SEY) in amorphous and graphitic carbon films prepared by PLD
Abstract
High secondary emission yield (SEY), and the subsequent build-up of a secondary electron cloud, may severely limit the stability of high-intensity particle beams inside particle accelerators. One of the best candidates of beam pipe coating for reduced SEY has been amorphous carbon (a-C) produced by direct current (D.C.) magnetron sputtering. Here we used pulsed laser deposition (PLD), to prepare a-C films from a pure carbon target at substrate temperatures ranging from 300 K to 773 K. The ablating laser was a Nd:YAG system operating at 1064 nm wavelength. With increasing temperature the optical band gap dropped from about 2.1 eV to 1.0 eV. This trend indicates transition from predominantly a-C films to films with more graphitic content, which was also confirmed by Raman measurements. SEY spectra were taken upto 1732 eV of primary electron energy. The maximum SEY value decreased from 1.9 in a-C films down to 1.4 in highly graphitic films deposited at higher temperatures. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim