CERN Accelerating science

CERN Document Server 4 registres trobats  La cerca s'ha fet en 0.54 segons. 
1.
Laser Engineered Surface Structures for Custom Design of Secondary Electron Yield / Bajek, David (U. Dundee) ; Wackerow, Stefan (U. Dundee) ; Sitko, Monika (CERN) ; Calatroni, Sergio (CERN) ; Girolama, Beniamino Di (CERN) ; Abdolvand, Amin (U. Dundee)
Secondary Electron Yield (SEY) [3, 5] occurs in a system when a primary electron impinges a material's surface and induces the emission of a 1 st and potentially 2 nd generation secondary electrons (see Figure 1, Left). The total number of secondary electrons per primary electron is the SEY. [...]
2019 - 1 p. - Published in : 10.1109/CLEOE-EQEC.2019.8873330
In : 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, Munich, Germany, 23 - 27 Jun 2019
2.
Morphological and Chemical Characterization of Laser Treated Surface on Copper / Baudin, Lucie (CERN ; U. Evry) ; Sitko, Monika (CERN) ; Garion, Cédric (CERN) ; Chiggiato, Paolo (CERN) ; Delloro, Francesco (U. Evry) ; Gaslain, Fabrice (U. Evry) ; Sennour, Mohamed (U. Evry) ; Jeandin, Michel (U. Evry) ; Bajek, David (Dundee U.) ; Wackerow, Stefan (Dundee U.) et al.
Electron multipacting and electron cloud have been identified as being the major limiting factors for the beam quality or for the cryogenic system of high-intensity positive particles accelerators. Among conditioning operational techniques and other surface structuration techniques used to decrease the Secondary Electron Yield (SEY) of surfaces, laser surface treatment is a promising method to treat in situ and at atmospheric pressure copper surface of the vacuum chamber. [...]
2019 - 7 p. - Published in : Key Eng. Mater. 813 (2019) 254-260
3.
First Beam Test of Laser Engineered Surface Structures (LESS) at Cryogenic Temperature in CERN SPS Accelerator / Salemme, Roberto (CERN ; Euratom, St. Paul Lez Durance) ; Abdolvand, Amin (Dundee U.) ; Baglin, Vincent (CERN) ; Calatroni, Sergio (CERN) ; Chiggiato, Paolo (CERN) ; Di Girolamo, Beniamino (CERN) ; Garcia-Tabares Valdivieso, Elisa (CERN) ; Jenninger, Berthold (CERN) ; Prever-Loiri, Laurent (CERN) ; Sitko, Monika (CERN) et al.
Electron cloud mitigation is an essential requirement for accelerators of positive particles with high intensity beams to guarantee beam stability and limited heat load in cryogenic systems. Laser Engineered Surface Structures (LESS) are being considered, within the High Luminosity upgrade of the LHC collider at CERN (HL-LHC), as an option to reduce the Secondary Electron Yield (SEY) of the surfaces facing the beam, thus suppressing the electron cloud phenomenon. [...]
2018 - 4 p. - Published in : (2018) , pp. WEPMG005
- Published in : J. Phys.: Conf. Ser. 1067 (2018) 082017 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMG005
4.
Towards the Implementation of Laser Engineered Surface Structures for Electron Cloud Mitigation / Sitko, Monika (CERN) ; Abdolvand, Amin (Dundee U.) ; Baglin, Vincent (CERN) ; Bajek, David (Dundee U.) ; Calatroni, Sergio (CERN) ; Chiggiato, Paolo (CERN) ; Colling, Miriam (Daresbury) ; Di Girolamo, Beniamino (CERN) ; Garcia-Tabares Valdivieso, Elisa (CERN) ; Jones, Thomas (Daresbury) et al.
The LHC operation has proven that the electron cloud could be a significant limiting factor in machine performance, in particular for future High Luminosity LHC (HL-LHC) beams. Electron clouds, generated by electron multipacting in the beam pipes, leads to beam instabilities and beam-induced heat load in cryogenic systems. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-TUZGBE3 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUZGBE3

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