First Measurements of Beam-Induced Heating on the LHC Cryogenic System

The Large Hadron Collider (LHC) under operation at CERN is colliding 3.5 TeV hadron beams which are gradually increased in intensity and luminosity. Consequently, beam-induced heating on the beam screens and on the magnet cold masses starts to be observable on the LHC cryogenic system. This paper recalls the cooling principle of the magnet cold masses and beam screens in the LHC standard cells, describes the methods applied for assessing the beam-induced heating, discusses the experimental limitations and compares measurements with expected values.