Published May 31, 2021 | Version v1

Could "Flakes" of neutral paramagnetic or dipolar molecules explain beam losses in the LHC?

  • 1. GSI, Darmstadt, Germany and HFHF, Frankfurt, Germany
  • 2. CERN, Geneva, Switzerland

Description

“Flakes” of neutral water or oxygen molecules carrying
an electric or magnetic dipole moment can be attracted and trapped by the electromagnetic field of the circulating LHC proton beam. The possible presence of such flakes in the vacuum system could explain beam losses and beam insta-bilities encountered during the 2017 and 2018 LHC runs, and the observed effect of an external magnetic field.

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Additional details

Funding

European Commission
I.FAST - Innovation Fostering in Accelerator Science and Technology 101004730