CERN Accelerating science

Article
Report number	CERN-ATS-2011-244
Title	Specification of new Vacuum Chambers for the LHC Experimental Interactions
Author(s)	Veness, R (CERN) ; Assmann, R W (CERN) ; Ball, A (CERN) ; Behrens, A (CERN) ; Bracco, C (CERN) ; Bregliozzi, G (CERN) ; Bruce, R (CERN) ; Burkhardt, H (CERN) ; Corti, G (CERN) ; Gallilee, M A (CERN) ; Giovannozzi, M (CERN) ; Goddard, B (CERN) ; Mounet, N (EPFL, Lausanne) ; Mergelkuhl, D (CERN) ; Nessi, M (CERN) ; Riegler, W (CERN) ; Salvant, B (EPFL, Lausanne) ; Wenninger, J (CERN)
Publication	2011
Imprint	01 Dec 2011
Number of pages	4
In:	2nd International Particle Accelerator Conference, San Sebastian, Spain, 4 - 9 Sep 2011, pp.TUPS026
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC
Abstract	The apertures for the vacuum chambers at the interaction points inside the LHC experiments are key both to the safe operation of the LHC machine and to obtaining the best physics performance from the experiments. Following the successful start-up of the LHC physics programme the ALICE, ATLAS and CMS experiments have launched projects to improve physics performance by adding detector layers closer to the beam. To achieve this they have requested smaller aperture vacuum chambers to be installed. The first periods of LHC operation have yielded much information both on the performance of the LHC and the stability and alignment of the experiments. In this paper, the new information relating to the aperture of these chambers is presented and a summary is made of analysis of parameters required to safely reduce the vacuum chambers apertures for the high-luminosity experiments ATLAS and CMS.
Copyright/License	publication: (License: CC-BY)

Email contact: [email protected]