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Vacuum for accelerators: introduction to materials and properties

In modern accelerators, stringent requirements are placed on the materials used for vacuum systems. Their physical and mechanical properties, machinability, weldability and brazeability are key parameters. Adequate strength, ductility, magnetic properties at room as well as low temperatures are impo...

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Autor principal: Sgobba, Stefano
Lenguaje:eng
Publicado: 2020
Materias:
Acceso en línea:http://cds.cern.ch/record/2723993
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author Sgobba, Stefano
author_facet Sgobba, Stefano
author_sort Sgobba, Stefano
collection CERN
description In modern accelerators, stringent requirements are placed on the materials used for vacuum systems. Their physical and mechanical properties, machinability, weldability and brazeability are key parameters. Adequate strength, ductility, magnetic properties at room as well as low temperatures are important factors for vacuum systems of accelerators working at cryogenic temperatures. In addition, components undergoing baking or activation of Non-Evaporable Getters (NEG) or directly exposed to the beam impose specific choices of material grades for suitable outgassing and mechanical properties in a large temperature range. Today, stainless steels are the dominant materials of vacuum systems. The reasons for specific requirements in terms of metallurgical processes are detailed for obtaining adequate purity, inclusion cleanliness and fineness of the microstructure. In many cases these requirements are crucial to guarantee the final leak tightness of the vacuum components. Innovative manufacturing and material examination technologies are also treated.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2020
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spelling cern-27239932020-07-18T03:30:50Zhttp://cds.cern.ch/record/2723993engSgobba, StefanoVacuum for accelerators: introduction to materials and propertiesphysics.acc-phAccelerators and Storage RingsIn modern accelerators, stringent requirements are placed on the materials used for vacuum systems. Their physical and mechanical properties, machinability, weldability and brazeability are key parameters. Adequate strength, ductility, magnetic properties at room as well as low temperatures are important factors for vacuum systems of accelerators working at cryogenic temperatures. In addition, components undergoing baking or activation of Non-Evaporable Getters (NEG) or directly exposed to the beam impose specific choices of material grades for suitable outgassing and mechanical properties in a large temperature range. Today, stainless steels are the dominant materials of vacuum systems. The reasons for specific requirements in terms of metallurgical processes are detailed for obtaining adequate purity, inclusion cleanliness and fineness of the microstructure. In many cases these requirements are crucial to guarantee the final leak tightness of the vacuum components. Innovative manufacturing and material examination technologies are also treated.arXiv:2006.02212oai:cds.cern.ch:27239932020-06-03
spellingShingle physics.acc-ph
Accelerators and Storage Rings
Sgobba, Stefano
Vacuum for accelerators: introduction to materials and properties
title Vacuum for accelerators: introduction to materials and properties
title_full Vacuum for accelerators: introduction to materials and properties
title_fullStr Vacuum for accelerators: introduction to materials and properties
title_full_unstemmed Vacuum for accelerators: introduction to materials and properties
title_short Vacuum for accelerators: introduction to materials and properties
title_sort vacuum for accelerators: introduction to materials and properties
topic physics.acc-ph
Accelerators and Storage Rings
url http://cds.cern.ch/record/2723993
work_keys_str_mv AT sgobbastefano vacuumforacceleratorsintroductiontomaterialsandproperties