795007 SzGeCERN 20230531152115.0 oai:cds.cern.ch:795007 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN LHC-Project-Report-797 eng CERN-LHC-Project-Report-797 Claudet, S 1.8 K Refrigeration Units for the LHC: Performance Assessment of Pre-series Units 2005 Geneva CERN 02 Sep 2004 5 p paper The cooling capacity below 2 K for the superconducting magnets of the Large Hadron Collider (LHC), at CERN, will be provided by eight refrigeration units of 2400 W at 1.8 K, each of them coupled to a 4.5 K refrigerator. The two selected vendors have proposed cycles based on centrifugal cold compressors combined with volumetric screw compressors with sub-atmospheric suction, as previously identified by CERN as “reference cycle”. The supply of the series units was linked to successful testing and acceptance of the pre-series temporarily installed in a dedicated test station. The global capacity, the performance of cold compressors and some process specificities have been thoroughly tested and will be presented. CERN EDS SIS:200711 PR/LKR added SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT ARTICLE CERN LHC Not applicable Ferlin, G Millet, F Tavian, L LHC 20th International Cryogenic Engineering Conference (ICEC20) CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project Report-797 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-797 Access to fulltext document http://cds.cern.ch/record/795007/files/lhc-project-report-797.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN CEA, SBT, DRFMC, DSM, Grenoble, France n 200445 13 20100401 2001 CER01 20040927 741806 999-1002 beijing20040511 PUBLIC 002484750CER ARTICLE ConferencePaper 0001 795005 SzGeCERN 20230531152331.0 oai:cds.cern.ch:795005 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN LHC-Project-Report-796 eng CERN-LHC-Project-Report-796 Gruehagen, Henning Measured Performance of Four New 18 kW@4.5 K Helium Refrigerators for the LHC Cryogenic System 2005 Geneva CERN 02 Sep 2004 5 p paper revised version submitted on 2004-09-28 12:15:12 The cryogenic system for the Large Hadron Collider (LHC) under construction at CERN will include four new 4.5 K-helium refrigerators, to cover part of the cooling needs of the LHC at the 4.5-20 K and 50-75 K levels. Two refrigerators are delivered by Air Liquide, France, and two by Linde Kryotechnik, Switzerland. During the last three years, all four refrigerators have been installed and commissioned at four different points along the LHC. The specified requirements of the refrigerators are presented, with special focus on the capacities at the various temperature levels. The capacities of the refrigerators were measured using a dedicated test cryostat, and the measured performance for all four installations is presented, and compared to the guaranteed performance in the original proposal of the suppliers. Finally, the process design of the two supplies is compared, and their differences and similarities briefly analysed. CERN EDS SIS ARC-PR-2007 SIS:200711 PR/LKR added CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT ARTICLE CERN LHC Not applicable Wagner, U LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-796 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-796 Access to fulltext document http://cds.cern.ch/record/795005/files/lhc-project-report-796.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN n 200440 13 20100401 2001 CER01 20040927 741806 991-994 beijing20040511 PUBLIC 002484711CER ARTICLE ConferencePaper 0001 795004 SzGeCERN 20230531152129.0 oai:cds.cern.ch:795004 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN LHC-Project-Report-795 eng CERN-LHC-Project-Report-795 Andersen, T P Series Production of 13 kA Current Leads with Dry and Compact Warm Terminals 2005 Geneva CERN 02 Sep 2004 5 p paper For the LHC magnet test benches 13 pairs of conventional helium vapour-cooled 13 kA current leads are required. The current leads have been designed and built by industry. Attention was given to economical and reliable design and to a design of the warm terminal in order to avoid any condensation. Three pairs of them were tested at CERN. The dry warm terminal enables voltage test at 4.1 kV at cold condition. The paper describes construction details and compares calculated and measured values of the main parameters. CERN EDS SIS:200711 PR/LKR added SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT ARTICLE CERN LHC Not applicable Benda, V Vullierme, B LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-795 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-795 Access to fulltext document http://cds.cern.ch/record/795004/files/lhc-project-report-795.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN Mark & Wedell, Kvistgaard, Denmark n 200440 13 20100401 2001 CER01 20040927 741806 1035-1038 beijing20040511 PUBLIC 002484710CER ARTICLE ConferencePaper 0001 795003 SzGeCERN 20230531152114.0 oai:cds.cern.ch:795003 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN LHC-Project-Report-794 eng CERN-LHC-Project-Report-794 Gomes, P Experience with the String2 Cryogenic Instrumentation and Control System 2005 Geneva CERN 02 Sep 2004 5 p paper String2 was a 120 m full-scale model of a regular cell of the LHC accelerator arc. It was composed of eight superconducting main magnets, fed by a separate cryogenic distribution line (QRL); an electrical feed box (DFB) which supported the superconducting current leads that powered the magnets [1]. Bearing an intensive experimental programme, String2 was heavily instrumented. The cryogenic instrumentation and control system, whose complexity was close to a full 3.3 km LHC sector, have already been described in [2]. String2 was a useful facility to validate design choices and to gain knowledge on installation and commissioning procedures. This paper reports on the experience of four years of designing, installation, commissioning and maintenance, and outlines the lessons learned for the LHC. CERN EDS SIS ARC-PR-2007 SIS:200711 PR/LKR added CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT ARTICLE CERN LHC Not applicable Balle, C Blanco-Viñuela, E Casas-Cubillos, J Pelletier, S Rodríguez, M A Serio, L Suraci, A Vauthier, N LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-794 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-794 Access to fulltext document http://cds.cern.ch/record/795003/files/lhc-project-report-794.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN n 200440 13 20100401 2001 CER01 20040927 741806 1051-1054 beijing20040511 PUBLIC 002484709CER ARTICLE ConferencePaper 0001 795002 SzGeCERN 20230531152321.0 oai:cds.cern.ch:795002 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN LHC-Project-Report-793 eng CERN-LHC-Project-Report-793 Axensalva, J Cryogenic Infrastructure for Testing of LHC Series Superconducting Magnets 2005 Geneva CERN 02 Sep 2004 5 p paper The ~1800 superconducting magnets for the LHC machine shall be entirely tested at reception before their installation in the tunnel. For this purpose and in order to reach the reliability and efficiency at the nominal load required for an industrial operation for several years, we have gradually upgraded and retrofitted the cryogenic facilities installed in the early nineties for the testing at CERN of prototypes and preseries magnets. The final infrastructure of the test station, dedicated to check industrially the quality of the series magnets, is now nearly complete. We present the general layout and describe the overall performance of the system. CERN EDS SIS ARC-PR-2007 SIS:200711 PR/LKR added CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT ARTICLE CERN LHC Not applicable Benda, V Herblin, L Lamboy, J P Tovar-Gonzalez, A Vuillerme, B LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-793 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-793 Access to fulltext document http://cds.cern.ch/record/795002/files/lhc-project-report-793.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN n 200440 13 20100401 2001 CER01 20040927 741806 1015-1018 beijing20040511 PUBLIC 002484708CER ARTICLE ConferencePaper 0001 795001 SzGeCERN 20230531152319.0 oai:cds.cern.ch:795001 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN LHC-Project-Report-792 eng CERN-LHC-Project-Report-792 Axensalva, J Control System and Operation of the Cryogenic Test Facilities for LHC Series Superconducting Magnets 2005 Geneva CERN 02 Sep 2004 5 p paper Prior to their final preparation before installation in the tunnel, the ~1800 series superconducting magnets of the LHC machine will be entirely tested at reception on modular test facilities using dedicated control systems. The test facilities are operated by teams of high-skilled and trained operators. This paper describes the architecture of the control & supervision system of the cryogenic test facilities as well as the tools and management systems developed to help in real time all involved operation teams in order to reach the required industrial production level. CERN EDS SIS ARC-PR-2007 SIS:200711 PR/LKR added CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT ARTICLE CERN LHC Not applicable Herblin, L Lamboy, J P Tovar-Gonzalez, A Vullierme, B LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-792 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-792 Access to fulltext document http://cds.cern.ch/record/795001/files/lhc-project-report-792.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN n 200440 13 20100401 2001 CER01 20040927 741806 1023-1025 beijing20040511 PUBLIC 002484707CER ARTICLE ConferencePaper 0001 795000 SzGeCERN 20230531152113.0 oai:cds.cern.ch:795000 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN LHC-Project-Report-791 eng CERN-LHC-Project-Report-791 Liu, L Numerical Study of the Final Cooldown from 4.5 K to 1.9 K of the Large Hadron Collider 2005 Geneva CERN 02 Sep 2004 5 p paper To simulate and analyze the final cooldown process of a LHC standard cell (106.9 m length) including the filling operation at 4.5 K and the cooldown from 4.5 K to 1.9 K, a mathematical model is proposed and validated by experimental data. In this model, the mass equations for liquid and vapor, the momentum equation for liquid and the general equation for mixed flow are taken into account for the different filling and cooldown phases. As a result of the simulation, the temperature profiles of the cold mass of the cell as well as the evolution of the helium void fractions, filling ratio and HeII position are obtained. The filling and cooldown times have also been estimated, and some characteristics of heat transfer of the HeII bayonet heat exchanger have been presented. CERN EDS SIS ARC-PR-2007 SIS:200711 PR/LKR added CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT ARTICLE CERN LHC Not applicable Riddone, G Tavian, L LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-791 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-791 Access to fulltext document http://cds.cern.ch/record/795000/files/lhc-project-report-791.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China n 200440 13 20100401 2001 CER01 20040927 741806 1007-1010 beijing20040511 PUBLIC 002484706CER ARTICLE ConferencePaper 0001 794998 SzGeCERN 20230531152309.0 oai:cds.cern.ch:794998 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN SPIRES 6032907 Inspire 663020 LHC-Project-Report-790 eng CERN-LHC-Project-Report-790 Chorowski, M Flow and Thermo-mechanical Analysis of the LHC Sector Helium Relief System 2005 Geneva CERN 02 Sep 2004 5 p paper A simultaneous resistive transition of a LHC magnet sector, which may occasionally occur, will cause rapid helium outflow from magnet cryostats to a special relief system composed of long pipes, buffer volumes and accessories. The paper presents some safety and operational aspects of this system. The results show helium dynamic property distributions along the pipes as well as FEM calculations of thermo-structural stresses in the pipe walls. CERN EDS SIS ARC-PR-2007 SIS:200711 PR/LKR added CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT ARTICLE CERN LHC Not applicable Fydrych, J Riddone, G LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-790 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-790 Access to fulltext document http://cds.cern.ch/record/794998/files/lhc-project-report-790.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN Wroclaw University of Technology, Wroclaw, Poland n 200440 13 20100901 1606 CER01 20040927 741806 1011-1014 beijing20040511 PUBLIC 002484704CER ARTICLE ConferencePaper 0001 794997 SzGeCERN 20230531152112.0 oai:cds.cern.ch:794997 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN LHC-Project-Report-789 eng CERN-LHC-Project-Report-789 Brodzinski, R L The Applicability of Ultrasonic Oxygen Deficiency Hazard Detectors in the LHC Accelerator Tunnel 2005 Geneva CERN 02 Sep 2004 5 p paper The Large Hadron Collider (LHC), will contain about 96 tonnes of high-density helium, mostly located in the underground components of the LHC machine. Some of potential LHC cryogenic system failures might be followed by helium discharge to the tunnel and potential decrease of the oxygen concentration below the safety level of 18% cannot be excluded. A novel concept for oxygen deficiency detection can be based on measurements of sound velocity in the atmosphere. The paper presents the test results of ultrasonic ODH detection prototype system in radiation environment similar to that predicted for the LHC. CERN EDS SIS ARC-PR-2007 SIS:200711 PR/LKR added CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT ARTICLE CERN LHC Not applicable Chorowski, M Gizicki, W Ostropolski, W Riddone, G LHC 20th International Cryogenic Engineering Conference (ICEC20) CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project Report-789 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-789 Access to fulltext document http://cds.cern.ch/record/794997/files/lhc-project-report-789.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN Wroclaw University of Technology, Wroclaw, Poland n 200445 13 20100401 2001 CER01 20040927 741806 1003-1006 beijing20040511 PUBLIC 002484703CER ARTICLE ConferencePaper 0001 794996 SzGeCERN 20230531152112.0 oai:cds.cern.ch:794996 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN SPIRES 6032893 Inspire 663019 LHC-Project-Report-788 eng CERN-LHC-Project-Report-788 Goiffon, T Conceptual design of the Cryogenic Electrical Feedboxes and the Superconducting Links of LHC 2005 Geneva CERN 02 Sep 2004 5 p paper Powering the superconducting magnets of the LHC arcs and long straight sections is performed with more than 1000 electrical terminals supplying currents ranging from 120 A to 13’000 A and distributed in 44 cryogenic electrical feedboxes (DFB). Where space in the LHC tunnel is sufficient, the magnets are powered by locally installed cryogenic electrical feedboxes. Where there is no space for a DFB, the current will be supplied to the magnets by superconducting links (DSL) connecting the DFBs to the magnets on distances varying from 76 m to 510 m. CERN EDS SIS ARC-PR-2007 SIS:200711 PR/LKR added CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT ARTICLE CERN LHC Not applicable Lyngaa, J Métral, L Perin, A Trilhe, P Van Weelderen, R LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-788 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-788 Access to fulltext document http://cds.cern.ch/record/794996/files/lhc-project-report-788.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN n 200440 13 20100901 1606 CER01 20040927 741806 1059-1062 beijing20040511 PUBLIC 002484702CER ARTICLE ConferencePaper 0001 794995 SzGeCERN 20230531152112.0 oai:cds.cern.ch:794995 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN SPIRES 6032885 Inspire 663018 LHC-Project-Report-787 eng CERN-LHC-Project-Report-787 Marie, R Measurement of the Thermal Properties of Prototype Lambda Plates for the LHC 2005 Geneva CERN 02 Sep 2004 5 p paper In order to power the LHC superconducting magnets, thousands of busbars will be routed from electrical feedboxes containing saturated helium at 4.5 K to magnets operating in pressurized superfluid helium at 1.9 K. Between those two volumes, the busbars will pass through special feedthroughs also called lambdaplates. This article presents heat flow measurements performed on several configurations of vertical prototype lambda-plates feedthroughs. The results show that the heat flow is strongly influenced by the configuration of the busbar insulation in the saturated helium. CERN EDS SIS ARC-PR-2007 SIS:200711 PR/LKR added CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT ARTICLE CERN LHC Not applicable Métral, L Perin, A Rieubland, Jean Michel LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-787 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-787 Access to fulltext document http://cds.cern.ch/record/794995/files/lhc-project-report-787.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN n 200440 13 20100901 1606 CER01 20040927 741806 1039-1042 beijing20040511 PUBLIC 002484701CER ARTICLE ConferencePaper 0001 795013 SzGeCERN 20161219132451.0 oai:cds.cern.ch:795013 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN SPIRES 6032974 Inspire 663027 CERN-AT-2004-023-ACR eng Rousset, B Heat Transfer Enhancement of He II Co-current Two-phase Flow in The Presence of Atomisation 2005 Geneva CERN 22 Sep 2004 5 p paper Previous experiments performed on HeII co-current two-phase flow at CEA Grenoble have shown the existence of a transition from stratified two-phase flow to droplet mist flow at high vapour velocities. The realisation of a new refrigerator/liquefier able to produce up to 20 g/s of single phase superfluid helium at 1.8 K (instead of 7 g/s previously) was achieved. Benefit was taken of the necessary junction between the existent test line and the refrigerator to introduce some new instrumentation [1]. Results of preliminary experiments performed on this new configuration are given. The response of liquid level and vapour density on droplet flow is presented. First results on pressure drop obtained for a total mass flow rate of 15 g/s are also presented. Finally, the use of various capacitive level gauges glued at different azimutal positions along the inner pipe give access to the perimeter wetted by a continuous thin liquid film. CERN EDS SIS:200711 PR/LKR added UNCL SzGeCERN Accelerators and Storage Rings CERN ARTICLE Thibault, P Perraud, S Puech, L Wolf, P E Van Weelderen, R AT CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2004-23-ACR http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=at-2004-023 Access to fulltext document http://cds.cern.ch/record/795013/files/at-2004-023.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN CEA-Grenoble/DRFMC/SBT, Grenoble, France CNRS/CRTBT, Grenoble, France n 200443 13 20100901 1606 CER01 20040927 741806 761-764 beijing20040511 PUBLIC 002484757CER ARTICLE ConferencePaper 0001 795012 SzGeCERN 20161219132451.0 oai:cds.cern.ch:795012 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN SPIRES 6032966 Inspire 663026 CERN-AT-2004-021-ACR eng Claudet, S Two 100 m Invar® Transfer Lines at CERN : Design Principles and Operating Experience for Helium Refrigeration 2005 Geneva CERN 02 Sep 2004 5 p paper The distribution of helium for the Large Hadron Collider (LHC), at CERN, will require a large variety of transfer lines. At the time of qualification of possible technologies, Invar® was investigated as potential material for internal tubes. Intensive developments were made in industry to qualify the use of Invar® M93 and its associated welding parameters. Although all tests showed good perspective, the risk associated with the lack of proven reference turned out to be dissuasive with respect to the possible cost savings for the LHC cryogenic system. However, since DN100 transfer lines were necessary for the supply and return of a test facility over a distance of 100 m, an Invar® based solution was considered, as repair or exchange would have been less dramatic than in the LHC accelerator tunnel. After recalling the technical requirements, the required material qualification will be presented as well as the design principles and operating features. This equipment has been first cooled-down to 4.5 K and accepted in 2001. More than sixty complete thermal cycles from 300 K to 4.5 K have been performed since then without change of performance including helium leaktightness. CERN EDS SIS:200711 PR/LKR added UNCL SzGeCERN Accelerators and Storage Rings CERN ARTICLE Ferlin, G Millet, F Roussel, E Sengelin, J P AT CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2004-21-ACR http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=at-2004-021 Access to fulltext document http://cds.cern.ch/record/795012/files/at-2004-021.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN SBT, DRFMC, DSM, CEA, Grenoble, France Air Liquide DTA, Sassenage, France n 200443 13 20100901 1606 CER01 20040927 741806 1047-1050 beijing20040511 PUBLIC 002484756CER ARTICLE ConferencePaper 0001 795011 SzGeCERN 20180618151121.0 oai:cds.cern.ch:795011 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN SPIRES 6032958 Inspire 663025 CERN-AT-2004-020-ECR eng Haug, F Studies on Cooling of the TOTEM Particle Detector at the LHC 2005 Geneva CERN 02 Sep 2004 5 p paper TOTEM is an experiment at the CERN LHC collider to measure the total pp cross section and elastic scattering of protons. For the detection of the elastically scattered particles at very small angles with respect to the beams edgeless silicon detectors will be contained in 36 small vacuum vessels called “roman pots” to be installed inside the LHC beam vacuum pipe. The final -not yet fixed-operating temperature is expected to be between 130 K and 220 K. The preferred cooling method applies a combination of cryogenic heat pipes and pulse tube refrigerators. CERN EDS SIS:200711 PR/LKR added Not for TOTEM collection CLAS1 SzGeCERN Accelerators and Storage Rings CERN ARTICLE CERN LHC TOTEM AT CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2004-20-ECR http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=at-2004-020 Access to fulltext document http://cds.cern.ch/record/795011/files/at-2004-020.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN n 200443 13 20110301 1419 CER01 20040927 741806 1027-1030 beijing20040511 PUBLIC 0001 002484755CER ARTICLE ConferencePaper TOTEM_Proc 795010 SzGeCERN 20161219132451.0 oai:cds.cern.ch:795010 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN SPIRES 6032940 Inspire 663024 CERN-AT-2004-019-ECR eng Haug, F Final Testing of the ATLAS Central Solenoid before Installation 2005 Geneva CERN 02 Sep 2004 5 p paper The central solenoid is part of the superconducting magnet system of the ATLAS experiment at the CERN LHC collider. It provides a 2 tesla axial magnetic field for the inner 24 m3 volume centre particle tracker. Design and construction was done in Japan by KEK and Toshiba in collaboration with CERN. Factory tests were made in Japan with the proximity cryogenics in a geometrical arrangement corresponding to the final installation and, a full magnet test. After shipment to CERN the proximity cryogenics has been installed at a surface hall and recommissioning with load simulations and the instrumentation adapted for radiation hard requirements at the final underground area. The solenoid has recently been integrated in the common cryostat vessel of the liquid argon barrel. Cool down for final surface testing has started. The final control systems architecture and process logics are applied which is tested. CERN EDS SIS:200711 PR/LKR added CLAS1 SzGeCERN Accelerators and Storage Rings CERN ARTICLE CERN LHC ATLAS Doi, Y Haruyama, T Kawai, M Kondo, T AUTHOR|(CDS)2067243 #BEARD# Kondo, Y Makida, Y Metselaar, J Passardi, Giorgio Pavlov, O Pezzetti, M Pirotte, O Ruber, Roger J M Y Sbrissa, E ten Kate, H H J Tyrvainen, H Yamamoto, A ATLAS Collaboration AT CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2004-19-ECR http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002484754 Access to fulltext document http://cds.cern.ch/record/795010/files/cer-002484754.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN KEK, Tsukuba, Ibaraki, Japan n 200443 13 20100901 1606 CER01 20040927 741806 1019-1022 beijing20040511 PUBLIC 002484754CER ARTICLE ConferencePaper 0001 795009 SzGeCERN 20161219132451.0 oai:cds.cern.ch:795009 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN SPIRES 6032931 Inspire 663023 CERN-AT-2004-018-ECR eng Haug, F Cryogenics Safety Review of the ATLAS Experiment at CERN 2005 Geneva CERN 02 Sep 2004 5 p paper The ATLAS detector at CERN to be installed at 90 m depth in a 50,000 m3 underground cavern is of unprecedented size and complexity. This is reflected in the helium and nitrogen cryogenic systems required respectively by the magnets (three large superconducting toroids and the central solenoid with 1.6 GJ stored energy) and by the argon calorimeters containing 82 m3 of liquid which can be drained into two 50 m3 dewars in case of emergency. Further coolants of 11 m3 of liquid helium and 15 m3 of liquid nitrogen are stored underground. The potential hazards of the large quantities of cryogens in underground areas require specific attention. Design, construction and quality assurance strictly follow applicable safety rules and the cryogenic process and controls are conceived to actively cope with a number of faults. In severe cases of accidental coolant loss (helium, nitrogen) or argon, detection systems produce alarms which result in the activation of emergency gas extraction. Reviews with international experts confirmed the good safety standard of the systems. CERN EDS SIS:200711 PR/LKR added CLAS1 SzGeCERN Accelerators and Storage Rings CERN ARTICLE CERN LHC ATLAS ATLAS Collaboration AT CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2004-18-ECR http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=at-2004-018 Access to fulltext document http://cds.cern.ch/record/795009/files/at-2004-018.pdf Access to fulltext document evelyne.delucinge@cern.ch CERN n 200443 13 20100901 1606 CER01 20040927 741806 1031-1034 beijing20040511 PUBLIC 002484752CER ARTICLE ConferencePaper 0001 795008 SzGeCERN 20161219132451.0 CERN EDS SIS:200711 PR/LKR added UNCL ARTICLE ConferencePaper Barth, K Passardi, Giorgio Serio, L Tavian, L Delikaris, D CERN ARTICLE 002484751CER evelyne.delucinge@cern.ch CERN-AT-2004-017-ECR CERN is a large user of industrially procured cryogens essentially liquid helium and nitrogen. Recent contracts have been placed by the Organization for the delivery of quantities up to 280 tons of liquid helium over four years and up to 50000 tons of liquid nitrogen over three years. Main users are the very large cryogenic system of the LHC accelerator complex, the physics experiments using superconducting magnets and liquefied gases and all the related test facilities whether industrial or laboratory scale. With the commissioning of LHC, the need of cryogens at CERN will considerably increase and the procurement policy must be adapted accordingly. In this paper, we discuss procurement strategy for liquid helium and nitrogen, including delivery rates, distribution methods and adopted safety standards. Global turnover, on site re-liquefaction capacity, operational consumption, accidental losses, purification means and storage capacity will be described. Finally, the short to medium term evolution of the Organization’s requirements will be reviewed. SzGeCERN Accelerators and Storage Rings n 200443 5 p paper http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=at-2004-017 Access to fulltext document http://cds.cern.ch/record/795008/files/at-2004-017.pdf Access to fulltext document AT CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2004-17 The Management of Cryogens at CERN oai:cds.cern.ch:795008 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN 2005 Geneva CERN 02 Sep 2004 eng 0001 CERN 13 20071128 1102 CER01 20040927 741806 1055-1058 beijing20040511 PUBLIC