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First Operational Experience and Performance Optimization of the ATLAS Magnet Cryogenic System
/ Delruelle, N (CERN) ; Barth, K (CERN) ; Dudarev, A (CERN) ; Passardi, G (CERN) ; Ten Kate, H H J (CERN)
The ATLAS magnet system, comprising a superconducting central solenoid and three superconducting toroids, has been successfully ramped up for the first time to the nominal operational current of 20.4 kA on 4th August 2008. Since then, new cryogenic operational challenges have been raised, like the smoothing of steady-state parameters, the enhancing of transient procedures to minimize thermal shocks on the magnet cold masses, the optimization of the complex cryogenic system in order to reduce the compressors electric consumption and finally how to avoid regular clogging of the shield refrigerator by water contamination. [...]
CERN-ATS-2012-008.-
Geneva : CERN, 2012 - 9 p.
- Published in : AIP Conf. Proc. 1434 (2012) 86-93
Fulltext: PDF;
In : Cryogenic Engineering Conference & International Cryogenic Material Conference: Transactions of the Cryogenic Engineering Conference - CEC, Volume 57, Spokane, WA, USA, 13 - 17 Jun 2011, pp.86-93
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Cooling System for a Frame-Store PN-CCD Detector for Low Background Application
/ Pereira, H (CERN) ; Haug, F (CERN) ; Santos Silva, P (CERN) ; Kuster, M (European XFEL, Hamburg) ; Lang, P (Darmstadt, Tech. Hochsch.)
The astroparticle physics experiment CERN Axion Solar Telescope (CAST) aims to detect hypothetical axions or axion-like particles produced in the Sun by the Primakoff process. A Large Hadron Collider (LHC) prototype superconducting dipole magnet provides a 9 T transverse magnetic field for the conversion of axions into detectable X-ray photons. [...]
CERN-ATS-2012-007.-
Geneva : CERN, 2012 - 9 p.
- Published in : AIP Conf. Proc. 1434 (2012) 1190-1197
Fulltext: PDF;
In : Cryogenic Engineering Conference & International Cryogenic Material Conference: Transactions of the Cryogenic Engineering Conference - CEC, Volume 57, Spokane, WA, USA, 13 - 17 Jun 2011, pp.1190-1197
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First Assessment of Reliability Data for the LHC Accelerator and Detector Cryogenic System Components
/ Perinic, G (CERN) ; Claudet, S (CERN) ; Alonso-Canella, I (CERN) ; Balle, C (CERN) ; Barth, K (CERN) ; Bel, J F (CERN) ; Benda, V (CERN) ; Bremer, J (CERN) ; Brodzinski, K (CERN) ; Casas-Cubillos, J (CERN) et al.
The Large Hadron Collider (LHC) cryogenic system comprises eight independent refrigeration and distribution systems that supply the eight 3.3 km long accelerator sectors with cryogenic refrigeration power as well as four refrigeration systems for the needs of the detectors ATLAS and CMS. In order to ensure the highest possible reliability of the installations, it is important to apply a reliability centred approach for the maintenance. [...]
CERN-ATS-2012-006.-
Geneva : CERN, 2012 - 9 p.
- Published in : AIP Conf. Proc. 1434 (2012) 1399-1406
Fulltext: PDF;
In : Cryogenic Engineering Conference & International Cryogenic Material Conference: Transactions of the Cryogenic Engineering Conference - CEC, Volume 57, Spokane, WA, USA, 13 - 17 Jun 2011, pp.1399-1406
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Operational Experience and Consolidations for the Current Lead Control Valves of the Large Hadron Collider
/ Perin, A (CERN) ; Brodzinski, K (CERN) ; Pirotte, O (CERN) ; Krieger, B (Bürkert GmbH) ; Widmer, A (Bürkert AG, Hünenberg)
The Large Hadron Collider superconducting magnets are powered by more than 1400 gas cooled current leads ranging from 120 A to 13000 A. The gas flow required by the leads is controlled by solenoid proportional valves with dimensions from DN 1.8 mm to DN 10 mm. [...]
CERN-ATS-2012-005.-
Geneva : CERN, 2012 - 9 p.
- Published in : AIP Conf. Proc. 1434 (2012) 1345-1352
Fulltext: PDF;
In : Cryogenic Engineering Conference & International Cryogenic Material Conference: Transactions of the Cryogenic Engineering Conference - CEC, Volume 57, Spokane, WA, USA, 13 - 17 Jun 2011, pp.1345-1352
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Possible Cryogenic Configurations for the Superconducting Magnets of the Damping Rings of the Compact Linear Collider (CLIC)
/ Perin, A (CERN) ; Papaphilippou, Y (CERN) ; Russenschuck, S (CERN) ; Schoerling, D (CERN)
The Compact Linear Collider is a future electron-positron linear collider currently under study. Before being injected into the main linear accelerating structures, both the electron and the positron beams must pass through damping rings that will drastically reduce their emittance in all three dimensions. [...]
CERN-ATS-2012-004.-
Geneva : CERN, 2012 - 8 p.
- Published in : AIP Conf. Proc. 1434 (2012) 1425-1431
Fulltext: PDF;
In : Cryogenic Engineering Conference & International Cryogenic Material Conference: Transactions of the Cryogenic Engineering Conference - CEC, Volume 57, Spokane, WA, USA, 13 - 17 Jun 2011, pp.1425-1431
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Steady-State Heat Transfer Through Micro-Channels in Pressurized He II
/ Granieri, P P (CERN ; Ecole Polytechnique, Lausanne, LPAP) ; Baudouy, B (IRFU, Saclay) ; Four, A (IRFU, Saclay) ; Lentijo, F (IRFU, Saclay) ; Mapelli, A (CERN) ; Petagna, P (CERN) ; Tommasini, D (CERN)
The operation of the Large Hadron Collider superconducting magnets for current and high luminosity future applications relies on the cooling provided by helium-permeable cable insulations. These insulations take advantage of a He II micro-channels network constituting an extremely efficient path for heat extraction. [...]
CERN-ATS-2012-010.-
Geneva : CERN, 2011 - 9 p.
- Published in : AIP Conf. Proc. 1434 (2011) 231-238
Fulltext: PDF;
In : Cryogenic Engineering Conference & International Cryogenic Material Conference: Transactions of the Cryogenic Engineering Conference - CEC, Volume 57, Spokane, WA, USA, 13 - 17 Jun 2011
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