Cryogenics Experience with High Luminosity Running & Feedforward Controls

Abstract

The first part of the presentation will summarize the overall cryogenic performance and availability for 2017 and the expected performance for 2018 taking into account the beam induced heat loads in the inner triplets magnets and the beam screen circuits. The second part will focus on the update of the expected cryogenic limitations as well as on the available cryogenic power studies and associated tuning in order to deliver the required cooling power with respect to the 2018 beams operational conditions. The feedforward controls and refrigeration capacity improvements on the inner triplets and beam screen circuits will be discussed