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Persistent URL http://purl.org/net/epubs/work/39596199
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Record Id 39596199
Title Towards Implementation of Laser Engineered Surface Structures for Electron Cloud Mitigation
Abstract 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. Laser Engineered Surface Structures (LESS) is a novel surface treatment which changes the morphology of the internal surfaces of vacuum chambers. The surface modification results in a reduced secondary electron yield (SEY) and, consequently, in the eradication of the electron multipacting. Low SEY values of the treated surfaces and flexibility in choosing the laser parameters make LESS a promising treatment for future accelerators. LESS can be applied both in new and existing accelerators owing to the possibility of automated in-situ treatment. This approach has been developed and optimised for the LHC beam screens in which the electron cloud has to be mitigated before the HL-LHC upgrade. We will present the latest steps towards the implementation of LESS.
Organisation ASTeC , TECH , STFC
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Language English (EN)
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Paper In Conference Proceedings In 9th International Particle Accelerator Conference (IPAC18), Vancouver, Canada, 29 Apr 2018 - 4 May 2018, (2018): 1220-1223. http://accelconf.…8/papers/tuzgbe3.pdf 2018