Speaker
Description
The new beam screens for the High Luminosity LHC (HL-LHC) will be coated with a low Secondary Electron Yield (SEY) amorphous carbon (a-C) thin film to suppress electron multipacting and reduce heat loads to the cryogenic system. The production will cover 40 beam screens for the new superconducting magnets of the inner triplets in LHC interaction regions 1 (ATLAS) and 5 (CMS), as well as 24 beam screens for the drift line of the cryomodules housing the CRAB cavities.
This contribution presents the implementation of a large-scale coating facility dedicated to the deposition of a-C films on the various HL-LHC beam screens, adaptable to different geometries and lengths up to 14 meters. The rationale behind the chosen coating technology and process parameters is discussed, with emphasis on adhesion optimization, SEY minimization, and production throughput to meet the HL-LHC schedule. We report on the current status of the production campaign, including quality assurance statistics, and highlight the main challenges encountered together with the solutions adopted.
| In which format do you inted to submit your paper? | Word |
|---|