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Field quality in the LHC main quadrupole prototzpe before the cold tests

The field shape harmonics of the first superconducting main quadrupole prototype with the nominal design for LHC have been measured by CEA in Saclay at room temperature with rotating coils. The measurements were made during the quadrupole assembly. They provide information on field-shape quality bef...

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Detalles Bibliográficos
Autores principales: Gleis, S, Scandale, Walter, Todesco, Ezio
Lenguaje:eng
Publicado: 1999
Materias:
Acceso en línea:http://cds.cern.ch/record/691902
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author Gleis, S
Scandale, Walter
Todesco, Ezio
author_facet Gleis, S
Scandale, Walter
Todesco, Ezio
author_sort Gleis, S
collection CERN
description The field shape harmonics of the first superconducting main quadrupole prototype with the nominal design for LHC have been measured by CEA in Saclay at room temperature with rotating coils. The measurements were made during the quadrupole assembly. They provide information on field-shape quality before the execution of the cold tests. The measured values of the allowed components b6 and b10 differ from those computed for the nominal coil geometry. We show that a displacement of the inner coil blocks may induce this effect. The random components are also considered. We show that their measured values are compatible with a random displacement of the blocks characterised by a standard deviation of about 25mm. Scaling laws for multipoles induced by random displacements are worked out.
id cern-691902
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1999
record_format invenio
spelling cern-6919022023-05-31T13:25:11Zhttp://cds.cern.ch/record/691902engGleis, SScandale, WalterTodesco, EzioField quality in the LHC main quadrupole prototzpe before the cold testsAccelerators and Storage RingsThe field shape harmonics of the first superconducting main quadrupole prototype with the nominal design for LHC have been measured by CEA in Saclay at room temperature with rotating coils. The measurements were made during the quadrupole assembly. They provide information on field-shape quality before the execution of the cold tests. The measured values of the allowed components b6 and b10 differ from those computed for the nominal coil geometry. We show that a displacement of the inner coil blocks may induce this effect. The random components are also considered. We show that their measured values are compatible with a random displacement of the blocks characterised by a standard deviation of about 25mm. Scaling laws for multipoles induced by random displacements are worked out.LHC-PROJECT-NOTE-209oai:cds.cern.ch:6919021999-12-09
spellingShingle Accelerators and Storage Rings
Gleis, S
Scandale, Walter
Todesco, Ezio
Field quality in the LHC main quadrupole prototzpe before the cold tests
title Field quality in the LHC main quadrupole prototzpe before the cold tests
title_full Field quality in the LHC main quadrupole prototzpe before the cold tests
title_fullStr Field quality in the LHC main quadrupole prototzpe before the cold tests
title_full_unstemmed Field quality in the LHC main quadrupole prototzpe before the cold tests
title_short Field quality in the LHC main quadrupole prototzpe before the cold tests
title_sort field quality in the lhc main quadrupole prototzpe before the cold tests
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/691902
work_keys_str_mv AT gleiss fieldqualityinthelhcmainquadrupoleprototzpebeforethecoldtests
AT scandalewalter fieldqualityinthelhcmainquadrupoleprototzpebeforethecoldtests
AT todescoezio fieldqualityinthelhcmainquadrupoleprototzpebeforethecoldtests