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First accelerator test of vacuum components with laser-engineered surfaces for electron-cloud mitigation

Research output: Contribution to journalJournal article

  • Sergio Calatroni
  • Elisa Garcia-Tabares Valdivieso
  • Holger Neupert
  • Valentin Nistor
  • Ana Teresa Perez Fontenla
  • Mauro Taborelli
  • Paolo Chiggiato
  • Oleg Malyshev
  • Reza Valizadeh
  • Stefan Wackerow
  • Svetlana Zolotovskaya
  • W. Allan Gillespie
  • Amin Abdolvand
Article number113201
<mark>Journal publication date</mark>20/11/2017
<mark>Journal</mark>Physical Review Accelerators and Beams
Issue number11
Number of pages12
Publication StatusPublished
<mark>Original language</mark>English


Electron cloud mitigation is an essential requirement for high-intensity proton circular accelerators. Among other solutions, laser engineered surface structures (LESS) present the advantages of having potentially a very low secondary electron yield (SEY) and allowing simple scalability for mass production. Two copper liners with LESS have been manufactured and successfully tested by monitoring the electron cloud current in a dipole magnet in the SPS accelerator at CERN during the 2016 run. In this paper we report on these results as well as the detailed experiments carried out on samples—such as the SEYand topography studies—which led to an optimized treatment in view of the SPS test and future possible use in the HL-LHC.