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A Possible 1.8 K Refrigeration Cycle for the Large Hadron Collider

The Large Hadron Collider (LHC) under construction at the European Laboratory for Particle Physics, CERN, will make use of superconducting magnets operating below 2.0 K. This requires, for each of the eight future cryogenic installations, an isothermal cooling capacity of up to 2.4 kW obtained by va...

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Detalles Bibliográficos
Autores principales: Millet, F, Roussel, P, Tavian, L, Wagner, U
Lenguaje:eng
Publicado: 1997
Materias:
Acceso en línea:https://dx.doi.org/10.1007/978-1-4757-9047-4_46
http://cds.cern.ch/record/336204
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author Millet, F
Roussel, P
Tavian, L
Wagner, U
author_facet Millet, F
Roussel, P
Tavian, L
Wagner, U
author_sort Millet, F
collection CERN
description The Large Hadron Collider (LHC) under construction at the European Laboratory for Particle Physics, CERN, will make use of superconducting magnets operating below 2.0 K. This requires, for each of the eight future cryogenic installations, an isothermal cooling capacity of up to 2.4 kW obtained by vaporisation of helium II at 1.6 kPa and 1.8 K. The process design for this cooling duty has to satisfy several demands. It has to be adapted to four already existing as well as to four new refrigerators. It must cover a dynamic range of one to three, and it must to allow continuous pump-down from 4.5 K to 1.8 K. A possible solution, as presented in this paper, includes a combination of cold centrifugal and warm volumetric compressors. It is characterised by a low thermal load on the refrigerator, and a large range of adaptability to different operation modes. The expected power factor for 1.8 K cooling is given, and the proposed control strategy is explained.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1997
record_format invenio
spelling cern-3362042023-05-31T13:23:31Zdoi:10.1007/978-1-4757-9047-4_46http://cds.cern.ch/record/336204engMillet, FRoussel, PTavian, LWagner, UA Possible 1.8 K Refrigeration Cycle for the Large Hadron ColliderAccelerators and Storage RingsThe Large Hadron Collider (LHC) under construction at the European Laboratory for Particle Physics, CERN, will make use of superconducting magnets operating below 2.0 K. This requires, for each of the eight future cryogenic installations, an isothermal cooling capacity of up to 2.4 kW obtained by vaporisation of helium II at 1.6 kPa and 1.8 K. The process design for this cooling duty has to satisfy several demands. It has to be adapted to four already existing as well as to four new refrigerators. It must cover a dynamic range of one to three, and it must to allow continuous pump-down from 4.5 K to 1.8 K. A possible solution, as presented in this paper, includes a combination of cold centrifugal and warm volumetric compressors. It is characterised by a low thermal load on the refrigerator, and a large range of adaptability to different operation modes. The expected power factor for 1.8 K cooling is given, and the proposed control strategy is explained.LHC-Project-Report-140CERN-LHC-Project-Report-140oai:cds.cern.ch:3362041997-09-17
spellingShingle Accelerators and Storage Rings
Millet, F
Roussel, P
Tavian, L
Wagner, U
A Possible 1.8 K Refrigeration Cycle for the Large Hadron Collider
title A Possible 1.8 K Refrigeration Cycle for the Large Hadron Collider
title_full A Possible 1.8 K Refrigeration Cycle for the Large Hadron Collider
title_fullStr A Possible 1.8 K Refrigeration Cycle for the Large Hadron Collider
title_full_unstemmed A Possible 1.8 K Refrigeration Cycle for the Large Hadron Collider
title_short A Possible 1.8 K Refrigeration Cycle for the Large Hadron Collider
title_sort possible 1.8 k refrigeration cycle for the large hadron collider
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1007/978-1-4757-9047-4_46
http://cds.cern.ch/record/336204
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