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2000_ICEC18
16 items
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1.
A Cryogenic Test Set-Up for the Qualification of Pre-Series Test Cells for the LHC Cryogenic Distribution Line / Livran, J ; Mourou, G A ; Parente, C ; Riddone, G ; Rybkowski, D ; Veillet, N
Three pre-series Test Cells of the LHC Cryogenic Distribution Line (QRL) [1], manufactured by three European industrial companies, will be tested in the year 2000 to qualify the design chosen and verify the thermal and mechanical performances. A dedicated test stand (170 m x 13 m) has been built for extensive testing and performance assessment of the pre-series units in parallel. [...]
LHC-Project-Report-380; CERN-LHC-Project-Report-380.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.227-230 - Please contact the library if you need to access this document.
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2.
Helium Discharge and Dispersion In the LHC Accelerator Tunnel in Case of Cryogenic Failure / Chorowski, M ; Konopka, G ; Riddone, G
The Large Hadron Collider (LHC), presently under construction at CERN, will contain about 100 tonnes of helium, mostly located in the underground tunnel and caverns [1]. Potential failure modes of the accelerator, which may be followed by helium discharge to the tunnel, have been identified and the corresponding helium flows calculated. [...]
LHC-Project-Report-381; CERN-LHC-Project-Report-381.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.231-234 - Please contact the library if you need to access this document.
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3.
Cryogenic Facilities at 1.9 K for the Reception of the Superconducting Wires and Cables of the LHC Dipoles Magnets / Barth, K ; Dauvergne, J P ; Delruelle, N ; Ferlin, G ; Juillerat, A C ; Pirotte, O
CERN's LHC project has moved to an implementation phase. The fabrication of 1600 high-field superconducting magnets operating at 1.9 K will require about 6400 km of Nb-Ti cables. [...]
LHC-Project-Report-382; CERN-LHC-Project-Report-382.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.111-114 - Please contact the library if you need to access this document.
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4.
Gaseous Helium storage and management in the cryogenic system for the LHC / Barranco-Luque, M ; Tavian, L
The Large Hadron Collider (LHC) is presently under construction at CERN. Its main components are superconducting magnets which will operate in superfluid helium requiring cryogenics on a length of about 24 km around the machine ring with a total helium inventory of about 100 tonnes. [...]
LHC-Project-Report-383; CERN-LHC-Project-Report-383.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.143-146 - Please contact the library if you need to access this document.
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5.
An automatic ultrasonic welding process for interconnecting superconducting wires of the CERN Large Hadron Collider (LHC) / Brunet, J C ; Châtelain, A ; Jacquemod, A ; Monteiro, I
The Large Hadron Collider (LHC), the next research tool for particle physics at CERN, is due to start operation in 2005. The main components of the LHC are the superconducting twin-aperture magnets, operating at a temperature of 1.9 K. [...]
LHC-Project-Report-384; CERN-LHC-Project-Report-384.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.107-110 - Please contact the library if you need to access this document.
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6.
Experimental and Mathematical Analysis of Multilayer Insulation below 80 K / Chorowski, M ; Grzegory, P ; Parente, C ; Riddone, G
The Large Hadron Collider [1], presently under construction at CERN, will make an extensive use of multilayer insulation system (MLI). The total surface to be insulated will be of about 80000 m2. [...]
LHC-Project-Report-385; CERN-LHC-Project-Report-385.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.347-350 - Please contact the library if you need to access this document.
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7.
A Cryogenic Test Station for Subcooling Helium Heat Exchangers for LHC / Roussel, P ; Jäger, B ; Tavian, L
The superconducting magnets of the Large Hadron Collider (LHC) will be cooled at 1.9 K by distributed cooling loops where counter-flow heat exchangers will be integrated. To qualify potential suppliers for the 250-units series production, prototypes of various technologies have been selected by CERN and a test station was set up at CEA-Grenoble. [...]
LHC-Project-Report-386; CERN-LHC-Project-Report-386.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.319-322 - Please contact the library if you need to access this document.
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8.
Solutions for Liquid Nitrogen Pre-Cooling in Helium Refrigeration Cycles / Wagner, U
Pre-cooling of helium by means of liquid nitrogen is the oldest and one of the most common process features used in helium liquefiers and refrigerators. Its two principle tasks are to allow or increase the rate of pure liquefaction, and to permit the initial cool-down of large masses to about 80 K. [...]
LHC-Project-Report-387; CERN-LHC-Project-Report-387.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.419-422 - Please contact the library if you need to access this document.
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9.
Experience with a Pre-Series Superfluid Helium Test Bench for LHC Magnets / Benda, V ; Vullierme, B ; Schouten, J A
The Large Hadron Collider (LHC) under construction at CERN is based on the use of high-field superconducting magnets operating in superfluid helium. For the validation of the machine dipoles and quadrupoles, a magnet test plant is under construction requiring 12 so-called Cryogenic Feeder Units (CFU). [...]
LHC-Project-Report-388; CERN-LHC-Project-Report-388.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.235-238 - Please contact the library if you need to access this document.
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10.
Modelling of the Quench Process for the Optimisation of the Design and Protection of Superconducting Busbars for the LHC / Schmidt, R ; Sonnemann, F
The superconducting busbars powering the LHC magnets are highly stabilised with copper to reduce the probability of a quench starting in a busbar and to avoid excessive temperatures after a quench during current discharge. In order to determine the required copper stabilisation and the parameters of the protection system a finite difference program has been developed. [...]
LHC-Project-Report-389; CERN-LHC-Project-Report-389.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.183-186 - Please contact the library if you need to access this document.
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11.
Towards Cost-To-Performance Optimisation of Large Superfluid Helium Refrigeration Systems / Claudet, S ; Lebrun, P ; Tavian, L
The field range of superconducting devices may be extended by lowering their operating temperature, using superfluid helium refrigeration systems which have to deliver working pressures down to 1.6 kPa. The corresponding pressure ratio can be produced by integral cold compression or using a combination of cold compressors in series together with "warm" compressors at room temperature. [...]
LHC-Project-Report-391; CERN-LHC-Project-Report-391.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.203-206 - Please contact the library if you need to access this document.
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12.
Specification of Eight 2400 W @ 1.8 K Refrigeration Units for the LHC / Claudet, S ; Gayet, P ; Jäger, B ; Millet, F ; Roussel, P ; Tavian, L ; Wagner, U
The cooling capacity below 2 K for the superconducting magnets in the Large Hadron Collider (LHC), at CERN, will be provided by eight refrigeration units at 1.8 K, each of them coupled to a 4.5 K refrigerator. Taking into account the cryogenic architecture of the LHC and corresponding process design constraints, a reference solution based on a combination of cold centrifugal and warm volumetric compressors was established in 1997. [...]
LHC-Project-Report-392; CERN-LHC-Project-Report-392.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.207-210 - Please contact the library if you need to access this document.
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13.
The Cryogenic System for the ATLAS Liquid Argon Detector / Bremer, J
The ATLAS experiment will include three argon detectors of unprecedented size. The total liquid argon fill of the three cryostats is 83 m3. [...]
LHC-Project-Report-393; CERN-LHC-Project-Report-393.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.219-222 - Please contact the library if you need to access this document.
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14.
The Insulation Vacuum Barrier for the Large Hadron Collider (LHC) Magnet Cryostats / Castoldi, M ; Dolizy, F ; Parma, Vittorio ; Skoczen, Blazej ; Trilhe, P
The sectorisation of the insulation vacuum of the LHC magnet cryostats, housing the superconducting magnets, which operate in a 1.9 K superfluid helium bath, is achieved by means of vacuum barriers. Each vacuum barrier is a leak-tight austenitic stainless steel thin-wall structure, mainly composed of large diameter (between 0.6 m and 0.9 m) bellows and concentric corrugated cylinders. [...]
LHC-Project-Report-394; CERN-LHC-Project-Report-394.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.223-226 - Please contact the library if you need to access this document.
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15.
Instrumentation, Field Network And Process Automation for the LHC Cryogenic Line Tests / Bager, T ; Balle, C ; Bertrand, G ; Casas-Cubillos, J ; Gomes, P ; Parente, C ; Riddone, G ; Suraci, A
This paper describes the cryogenic control system and associated instrumentation of the test facility for 3 pre-series units of the LHC Cryogenic Distribution Line. For each unit, the process automation is based on a Programmable Logic Con-troller implementing more than 30 closed control loops and handling alarms, in-terlocks and overall process management. [...]
LHC-Project-Report-395; CERN-LHC-Project-Report-395.- Geneva : CERN, 2000 - 5 p. Access to fulltext document: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.655-658 - Please contact the library if you need to access this document.
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16.
High capacity Helium purifier for 14 g/s at 200 bar / Neumann, H (ITP, Forschunszentrum, Karlsruhe) ; Perinic, G (CERN)
LHC-Project-Report-390; CERN-LHC-Project-Report-390.- Geneva : CERN, 2000 - 5 p. Fulltext: PDF;
In : 18th International Cryogenic Engineering Conference, Mumbai, India, 21 - 25 Feb 2000, pp.503-506
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