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2.
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Comparison between Normal and HeII Two-phase Flows at High Vapor Velocities
/ Van Weelderen, R ; Perraud, S ; Rousset, B ; Thibault, P ; Wolf, P E
We present results on helium co-current two-phase flow experiments at high vapor velocity obtained with the use of the new CEA/SBT 400 W/1.8 K refrigerator [1]. For vapor velocities larger than typically 4 m/s, a mist of droplets develops from the bulk liquid interface accompanied by an increase in heat transfer at the wall. [...]
CERN-AT-2005-018-ACR.-
Geneva : CERN, 2006 - 9 p.
- Published in : AIP Conf. Proc. 823 (2006) 1669-1676
Access to fulltext document: PDF; External link: Published version from AIP
In : Conference on Cryogenic Engineering and on International Cryogenic Materials, Keystone, CO, USA, 29 Aug - 2 Sep 2005, pp.1669-1676
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3.
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Results of the Cryogenic Tests of the Superconducting Magnets forming the Barrel Toroid of the ATLAS Experiment
/ Pengo, R ; Barth, K ; Berriaud, C ; Delruelle, N ; Dudarev, A ; Junker, S ; Pirotte, O
The Barrel Toroid magnet of the ATLAS experiment will be built from eight 25 m x 5 m racetrack shaped superconducting coils that are symmetrically placed around the central axis of the detector. Prior to their final assembly in the underground cavern of the LHC, these magnets are individually tested at ground level in order to verify the expected overall performances. [...]
CERN-AT-2005-017-ECR.-
Geneva : CERN, 2006 - 7 p.
- Published in : AIP Conf. Proc. 823 (2006) 1628-1634
Access to fulltext document: PDF; External link: Published version from AIP
In : Conference on Cryogenic Engineering and on International Cryogenic Materials, Keystone, CO, USA, 29 Aug - 2 Sep 2005, pp.1628-1634
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4.
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Cryogenic Tests of the Atlas Liquid Argon Calorimeter
/ Fabre, C ; Bremer, J ; Chalifour, M ; Gonidec, A ; Passardi, Giorgio
The ATLAS liquid argon calorimeter consists of the barrel and two end-cap detectors housed in three independent cryostats filled with a total volume of 78 m3 of liquid argon. During cool-down the temperature differences in the composite structure of the detectors must be kept within strict limits to avoid excessive mechanical stresses and relative displacements. [...]
CERN-AT-2005-016-ECR.-
Geneva : CERN, 2006 - 9 p.
- Published in : AIP Conf. Proc. 823 (2006) 1635-1642
Access to fulltext document: PDF; External link: Published version from AIP
In : Conference on Cryogenic Engineering and on International Cryogenic Materials, Keystone, CO, USA, 29 Aug - 2 Sep 2005, pp.1635-1642
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5.
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Commissioning of the Helium Refrigerator System for the Compact Muon Solenoid (CMS) Detector of LHC
/ Perinic, G (CERN) ; Dupont, T
At CERN a new helium refrigeration plant specified for a cooling capacity of 800 W at 4.45 K, 4500 W between 60 K and 80 K and 4 g/s liquefaction simultaneously has been installed and commissioned. In a first operation phase, the plant will provide the refrigeration capacity for the cool down and the operation of the superconducting solenoid of the CMS experiment during the magnet tests at the surface of the LHC interaction point 5. [...]
CERN-AT-2005-015-ECR.-
Geneva : CERN, 2006 - 9 p.
- Published in : AIP Conf. Proc. 823 (2006) 2026-2033
Access to fulltext document: PDF;
In : Conference on Cryogenic Engineering and on International Cryogenic Materials, Keystone, CO, USA, 29 Aug - 2 Sep 2005, pp.2026-2033
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6.
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Commissioning of the Cryogenic System for the ATLAS Superconducting Magnets
/ Delruelle, N ; Baynham, D Elwyn ; Bradshaw, T ; Haug, F ; ten Kate, H H J ; Passardi, Giorgio ; Pengo, R ; Pezzetti, M ; Pirotte, O ; Rochford, J
The paper describes the test results of the helium cryoplant for the superconducting magnets of the ATLAS particle detector at CERN. It consists of two refrigerators used in common by all the magnets and of two proximity cryogenic systems (PCS) interfacing respectively the toroids and the central solenoid. [...]
CERN-AT-2005-014-ECR.-
Geneva : CERN, 2006 - 9 p.
- Published in : AIP Conf. Proc. 823 (2006) 2018-2025
Access to fulltext document: PDF; External link: Published version from AIP
In : Conference on Cryogenic Engineering and on International Cryogenic Materials, Keystone, CO, USA, 29 Aug - 2 Sep 2005, pp.2018-2025
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11.
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Feasibility Study of an Experiment to Measure the Vacuum Magnetic Birefringence
/ Pugnat, P ; Duvillaret, L ; Finger, Miroslav H ; Kral, M ; Siemko, A ; Zicha, J
The use of a recently decommissioned 15-meters long twin aperture LHC superconducting magnet prototype having a transverse magnetic field B ~ 9.5 T provides the unique opportunity for the construction of a new powerful experiment to measure the Vacuum Magnetic Birefringence (VMB). The values or the limit values of the mass and of the coupling constant to two photons of possible dark matter candidates such as axions are aimed to be deduced from such an experiment. [...]
CERN-AT-2005-009-MTM.-
Geneva : CERN, 2005 - 10 p.
- Published in : Czechoslov. J. Phys. 55 (2005) A389
Access to fulltext document: PDF;
In : Advanced Studies Institute on Symmetries and Spin, Prague, Czech Republic, 5 - 10 Jul 2004, pp.A389
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12.
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Ion-stimulated Gas Desorption Yields of Electropolished, Chemically Etched, and Coated (Au, Ag, Pd, TiZrV) Stainless Steel Vacuum Chambers and St707 Getter Strips Irradiated with 4.2 MeV/u lead ions
/ Mahner, E ; Hansen, J ; Küchler, D ; Malabaila, M ; Taborelli, M
The ion-induced desorption experiment, installed in the CERN Heavy Ion Accelerator LINAC 3, has been used to measure molecular desorption yields for 4.2 MeV/u lead ions impacting under grazing incidence on different accelerator-type vacuum chambers. Desorption yields for H2, CH4, CO, and CO2, which are of fundamental interest for future accelerator applications, are reported for different stainless steel surface treatments. [...]
CERN-AT-2005-008-VAC.-
Geneva : CERN, 2005 - 15 p.
- Published in : Phys. Rev. Spec. Top. Accel. Beams 8 (2005) 053201
APS Published version, local copy: PDF; Access to fulltext document: PDF;
- CERN library copies
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13.
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Future Accelerator Magnet Needs
/ Devred, Arnaud ; Gourlay, S A ; Yamamoto, A
Superconducting magnet technology is continually evolving in order to meet the demanding needs of new accelerators and to provide necessary upgrades for existing machines. A variety of designs are now under development, including high fields and gradients, rapid cycling and novel coil configurations. [...]
CERN-AT-2005-006-MAS; CARE-Conf-04-037-NED; CARE-Conf-2004-037-NED.-
Geneva : CERN, 2005 - 9 p.
- Published in : IEEE Trans. Appl. Supercond. 15 (2005) 1192-9
Access to fulltext document: PDF; Fulltext: PDF; IEEE Published version, local copy: PDF;
In : Applied Superconductivity Conference: Harnessing the Magic, Jacksonville, FL, USA, 3 - 8 Oct 2004, pp.1192-9
- CERN library copies
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15.
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A Cable-in-Conduit Superconductor for Pulsed Accelerator Magnets
/ Bottura, L ; Bruzzone, P ; Fischer, E ; Kauschke, M ; Moritz, G ; Vysotsky, V S ; Sytnikov, V E ; Wilson, M
Superconducting magnets for future accelerators such as the SIS-100 ring of the International Accelerator Facility at GSI-Darmstadt, or a superconducting injector at the LHC, require that the magnetic field is pulsed with high repetition rate and high reliability over periods of several years. [...]
CERN-AT-2005-004-MTM.
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2005. - 4 p.
Access to fulltext document - CERN library copies
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16.
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A Scaling Law for the Snapback in Superconducting Accelerator Magnets
/ Bottura, L ; Ambrosio, G ; Bauer, P ; Haverkamp, M ; Pieloni, T ; Sanfilippo, S ; Velev, G
The decay of the sextupole component in the bending dipoles during injection and the subsequent snapback at the start of beam acceleration are issues of common concern for all superconducting colliders built or in construction. Recent studies performed on LHC and Tevatron dipole magnets revealed many similarities in the snapback characteristics. [...]
CERN-AT-2005-003-MTM.-
Geneva : CERN, 2005 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 15 (2005) 1217-20
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : Applied Superconductivity Conference: Harnessing the Magic, Jacksonville, FL, USA, 3 - 8 Oct 2004, pp.1217-20
- CERN library copies
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17.
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Status of the Next European Dipole (NED) Activity of the Collaborated Accelerator Research in Europe (CARE) Project
/ Devred, Arnaud ; Baudouy, B ; Baynham, D Elwyn ; Boutboul, T ; Canfer, S ; Chorowski, M ; den Ouden, A ; Fabbricatore, P ; Farinon, S ; Fessia, P et al.
Plans for LHC upgrade and for the final focalization of linear colliders call for large aperture and/or high-performance dipole and quadrupole magnets that may be beyond the reach of conventional NbTi magnet technology. The Next European Dipole (NED) activity was launched on January 1st, 2004 to promote the development of high-performance, Nb$_{3}$Sn wires in collaboration with European industry (aiming at a non-copper critical current density of 1500Â A/mm2 at 4.2 K and 15 T) and to assess the suitability of Nb$_{3}$Sn technology to the next generation of accelerator magnets (aiming at an aperture of 88 mm and a conductor peak field of 15 T). [...]
CERN-AT-2005-002-MAS; CARE-Conf-04-020-NED; CARE-Conf-2004-020-NED.-
Geneva : CERN, 2005 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 15 (2005) 1106-12
Fulltext: PDF; IEEE Published version, local copy: PDF;
In : Applied Superconductivity Conference: Harnessing the Magic, Jacksonville, FL, USA, 3 - 8 Oct 2004
- CERN library copies
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18.
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Quench Propagation Ignition using Single-Mode Diode Laser
/ Trillaud, F ; Ayela, F (CNRS-CRTBT, Grenoble, France) ; Devred, Arnaud (CERN) ; Fratini, M (Pisa, Italy) ; Leboeuf, D (CEA/Sacla, Gif-Sur-Yvette, France) ; Tixador, P (CNRS-CRTBT, Grenoble, France)
The stability of NbTi-based multifilamentary composite wires subjected to local heat disturbances of short durations is studied in pool boiling helium conditions. [...]
CERN-AT-2005-001-MAS.
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2005. - 5 p.
Access to fulltext document - CERN library copies
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