@inproceedings{d97335fe254b4d4684373686f700c872,
title = "Study of SEY degradation of amorphous carbon coatings",
abstract = "Deposition of low secondary electron yield (SEY) carbon coatings by magnetron sputtering onto the inner walls of the accelerator seems to be the most promising solution for suppressing the electron cloud problem. However, these coatings change their electron emission properties during long term exposure to air. The ageing process of carbon coated samples with initial SEY of about 0.9 received from CERN is studied as a function of exposure to different environments. It is shown that samples having the same initial SEY may age with different rates. The SEY increase can be correlated with the surface concentration of oxygen. Annealing of samples in air at 100-200 °C reduces the ageing rate and even recovers previously degraded samples. The result of annealing is reduction of the hydrogen content in the coatings by triggering its surface segregation followed by desorption",
keywords = "FILMS",
author = "Nenad Bundaleski and S. Candeias and A. Santos and Silva, {Ana Cristina Gomes da} and Teodoro, {Orlando Manuel Neves Duarte} and Silva, {A. G.}",
note = "Work supported by Funda{\c c}{\~a}o para a Ci{\^e}ncia e Tecnologia do Minist{\'e}rio da Ci{\^e}ncia, Tecnologia e Ensino Superior (FCT/MCTES), through the project CERN/FP/109313/2009.; Joint INFN-CERN-EuCARD-AccNet Workshop on Electron-Cloud Effects (ECLOUD`12), ECLOUD`12 ; Conference date: 05-06-2012 Through 09-06-2012",
year = "2013",
doi = "10.5170/CERN-2013-002.149",
language = "English",
isbn = "978–92–9083–386–4",
series = "CERN Reports",
publisher = "CERN",
number = "CERN-2013-002",
pages = "149--152",
editor = "R. Cimino and G. Rumolo and F. Zimmermann",
booktitle = "ECLOUD'12",
}