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Vacuum stability and residual gas density estimation for the vacuum chamber upgrade of the ATLAS interaction region of the Large Hadron Collider

The CERN Large Hadron Collider (LHC) has 54 km of ultra-high vacuum (UHV) beam chambers out of which about 90% are at cryogenic temperature (1.9 K) and the rest at room temperature. During operation, the residual gas density in the beam pipes is dominated by beam induced effect such ion, electron an...

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Detalles Bibliográficos
Autores principales: Bregliozzi, G, Lanza, G, Baglin, V, Jimenez, J M
Publicado: 2012
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.vacuum.2012.03.041
http://cds.cern.ch/record/1559779
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author Bregliozzi, G
Lanza, G
Baglin, V
Jimenez, J M
author_facet Bregliozzi, G
Lanza, G
Baglin, V
Jimenez, J M
author_sort Bregliozzi, G
collection CERN
description The CERN Large Hadron Collider (LHC) has 54 km of ultra-high vacuum (UHV) beam chambers out of which about 90% are at cryogenic temperature (1.9 K) and the rest at room temperature. During operation, the residual gas density in the beam pipes is dominated by beam induced effect such ion, electron and photon-stimulated gas desorption. Therefore, the computation of gas density profile is of great importance to confirm the vacuum stability, and to estimate the beam lifetime. Moreover, the gas density profiles are essential to determine the machine induced background in the experimental areas, and to define the pressure profile in the cryogenic sectors where there is no vacuum instrumentation available. In this paper, the vacuum stability is studied for a newly proposed upgrade of the vacuum chamber at the ATLAS interaction point, using the vacuum stability code called VASCO. The residual gas density profile along the ATLAS vacuum chambers and the effects of photon and electron flux hitting the vacuum chamber walls are presented and analysed.
id cern-1559779
institution Organización Europea para la Investigación Nuclear
publishDate 2012
record_format invenio
spelling cern-15597792019-09-30T06:29:59Zdoi:10.1016/j.vacuum.2012.03.041http://cds.cern.ch/record/1559779Bregliozzi, GLanza, GBaglin, VJimenez, J MVacuum stability and residual gas density estimation for the vacuum chamber upgrade of the ATLAS interaction region of the Large Hadron ColliderAccelerators and Storage RingsDetectors and Experimental TechniquesThe CERN Large Hadron Collider (LHC) has 54 km of ultra-high vacuum (UHV) beam chambers out of which about 90% are at cryogenic temperature (1.9 K) and the rest at room temperature. During operation, the residual gas density in the beam pipes is dominated by beam induced effect such ion, electron and photon-stimulated gas desorption. Therefore, the computation of gas density profile is of great importance to confirm the vacuum stability, and to estimate the beam lifetime. Moreover, the gas density profiles are essential to determine the machine induced background in the experimental areas, and to define the pressure profile in the cryogenic sectors where there is no vacuum instrumentation available. In this paper, the vacuum stability is studied for a newly proposed upgrade of the vacuum chamber at the ATLAS interaction point, using the vacuum stability code called VASCO. The residual gas density profile along the ATLAS vacuum chambers and the effects of photon and electron flux hitting the vacuum chamber walls are presented and analysed.oai:cds.cern.ch:15597792012
spellingShingle Accelerators and Storage Rings
Detectors and Experimental Techniques
Bregliozzi, G
Lanza, G
Baglin, V
Jimenez, J M
Vacuum stability and residual gas density estimation for the vacuum chamber upgrade of the ATLAS interaction region of the Large Hadron Collider
title Vacuum stability and residual gas density estimation for the vacuum chamber upgrade of the ATLAS interaction region of the Large Hadron Collider
title_full Vacuum stability and residual gas density estimation for the vacuum chamber upgrade of the ATLAS interaction region of the Large Hadron Collider
title_fullStr Vacuum stability and residual gas density estimation for the vacuum chamber upgrade of the ATLAS interaction region of the Large Hadron Collider
title_full_unstemmed Vacuum stability and residual gas density estimation for the vacuum chamber upgrade of the ATLAS interaction region of the Large Hadron Collider
title_short Vacuum stability and residual gas density estimation for the vacuum chamber upgrade of the ATLAS interaction region of the Large Hadron Collider
title_sort vacuum stability and residual gas density estimation for the vacuum chamber upgrade of the atlas interaction region of the large hadron collider
topic Accelerators and Storage Rings
Detectors and Experimental Techniques
url https://dx.doi.org/10.1016/j.vacuum.2012.03.041
http://cds.cern.ch/record/1559779
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AT baglinv vacuumstabilityandresidualgasdensityestimationforthevacuumchamberupgradeoftheatlasinteractionregionofthelargehadroncollider
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