First beam test of Laser Engineered Surface Structures (LESS) at cryogenic temperature in CERN SPS accelerator

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 LH...

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Published inJournal of physics. Conference series Vol. 1067; no. 8; pp. 82017 - 82022
Main Authors Salemme, R, Baglin, V, Calatroni, S, Chiggiato, P, Di Girolamo, B, Garcia-Tabares Valdivieso, E, Jenninger, B, Prever-Loiri, L, Sitko, M, Wackerow, S, Abdolvand, A
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.09.2018
Subjects
CERN
Cryogenic temperature
Electron clouds
Electrons
Large Hadron Collider
Lasers
Luminosity
Particle accelerators
Particle beams
Physics
Synchrotrons
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Abstract 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. As part of this study, a 2.2 m long Beam Screen (BS) with LESS has been tested at cryogenic temperature in the COLD bore EXperiment (COLDEX) facility in the SPS accelerator at CERN. In this paper, we describe the manufacturing procedure of the beam screen, the employed laser treatment technique and discuss our first observations in COLDEX confirming electron cloud suppression.
AbstractList 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. As part of this study, a 2.2 m long Beam Screen (BS) with LESS has been tested at cryogenic temperature in the COLD bore EXperiment (COLDEX) facility in the SPS accelerator at CERN. In this paper, we describe the manufacturing procedure of the beam screen, the employed laser treatment technique and discuss our first observations in COLDEX confirming electron cloud suppression.
Author Salemme, R
Calatroni, S
Jenninger, B
Di Girolamo, B
Baglin, V
Chiggiato, P
Prever-Loiri, L
Abdolvand, A
Wackerow, S
Garcia-Tabares Valdivieso, E
Sitko, M
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Baglin V (13) 2005
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Snippet Electron cloud mitigation is an essential requirement for accelerators of positive particles with high intensity beams to guarantee beam stability and limited...
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StartPage 82017
SubjectTerms CERN
Cryogenic temperature
Electron clouds
Electrons
Large Hadron Collider
Lasers
Luminosity
Particle accelerators
Particle beams
Physics
Synchrotrons
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Title First beam test of Laser Engineered Surface Structures (LESS) at cryogenic temperature in CERN SPS accelerator
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