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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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Chiggiato, Paolo
European Organization for Nuclear Research
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2024Study of selected mild steels for application in vacuum systems of future gravitational wave detectorscitations
- 2019Role of the different chemical components in the conditioning process of air exposed copper surfacescitations
- 2019Cryogenic surface resistance of coppercitations
- 2019Cryogenic surface resistance of copper:Investigation of the impact of surface treatments for secondary electron yield reductioncitations
- 2017Amorphous Carbon Thin Film Coating of the SPS Beamline: Evaluation of the First Coating Implementation
- 2016Vacuum Performance of Amorphous Carbon Coating at Cryogenic Temperature with Presence of Proton Beams
- 2015Recommissioning of the COLDEX Experiment at CERN
- 2014Development of Aluminium Vacuum Chambers for the LHC Experiments at CERN
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document
Vacuum Performance of Amorphous Carbon Coating at Cryogenic Temperature with Presence of Proton Beams
Abstract
Amorphous carbon (a-C) coating is the baseline electron multipacting mitigation strategy proposed for the Inner Triplets (IT) in the High Luminosity upgrade of the Large Hadron Collider (HL-LHC). As of 2014, the COLD bore EXperiment (COLDEX) is qualifying the performance of a-C coating at cryogenic temperature in a LHC type cryogenic vacuum system. In this paper, the experimental results following a cryogenic vacuum characterization of a-C coating in the 5 to 150 K temperature range are reviewed. We discuss the dynamic pressure rise, gas composition, dissipated heat load and electron activity observed within an accumulated beam time of 9 Ah. The results of dedicated experiments including pre-adsorption of different gas species (H2, CO) on the a-C coating are discussed. Based of phenomenological modeling, up-to-date secondary emission input parameters for a-C coatings are retrieved for electron cloud build-up simulations. Finally, first implications for the HL-LHC ITs design are drawn.