| AVS 60th International Symposium and Exhibition | |
| Vacuum Technology | Wednesday Sessions |
| Session VT-WeM |
| Session: | Pumps, Accelerators and Large Vacuum Systems |
| Presenter: | G. Lanza, CERN, France |
| Authors: | G. Lanza, CERN, France G. Bregliozzi, CERN, France V. Baglin, CERN, France J.M. Jimenez, CERN, France |
| Correspondent: | Click to Email |
The LHC experiments ATLAS, CMS and LHCb will profit of the LHC Shutdown 1 (years 2013- 2014) to improve and upgrade their detectors included the vacuum beam pipes.
The new chambers and modules positioned in the central core of the detector have been designed and optimized following the experiment specification. The material used for the chamber walls are aluminium, beryllium, copper or inox in order to grant the required transparency for the radiation. The internal wall NEG coating is a fundamental characteristic to reach the ultrahigh vacuum pressure required to lower the detector background.
Several vacuum chambers and modules have been tested and validated to grant their efficiency after the installation in the cavern. The validation tests of the uncoated components included: leak tightness, ultimate vacuum pressure, material outgassing, and residual gas composition. The validation tests of the NEG coated elements included also the NEG pumping speed for different gases and the sticking coefficient measurement. The integration of new pumping components on the vacuum modules have been studied, simulated and tested as well.
In this paper the motivation for the beam pipe upgrade, the validation test and the results are illustrated and commented.