Lessons Learnt and Mitigation Measures for the CERN LHC Equipment with RF fingers

Beam-induced RF heating has been observed in several LHC components when the bunch/beam intensity was increased and/or the bunch length reduced. In particular eight bellows, out of the ten double-bellow modules present in the machine in 2011, were found with the spring, which should keep the RF fing...

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Detalles Bibliográficos
Autores principales: Métral, E, Aberle, O, Assmann, R W, Baglin, V, Barnes, M J, Berrig, O E, Bertarelli, A, Bregliozzi, G, Calatroni, S, Carra, F, Caspers, F, Day, H A, Ferro-Luzzi, M, Gallilee, M A, Garion, C, Garlasche, M, Grudiev, A, Jimenez, J M, Jones, R, Kononenko, O, Losito, R, Nougaret, J L, Parma, V, Redaelli, S, Salvant, B, Strubin, P, Veness, R, Vollinger, C, Weterings, W
Lenguaje:eng
Publicado: 2013
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/1588128
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author Métral, E
Aberle, O
Assmann, R W
Baglin, V
Barnes, M J
Berrig, O E
Bertarelli, A
Bregliozzi, G
Calatroni, S
Carra, F
Caspers, F
Day, H A
Ferro-Luzzi, M
Gallilee, M A
Garion, C
Garlasche, M
Grudiev, A
Jimenez, J M
Jones, R
Kononenko, O
Losito, R
Nougaret, J L
Parma, V
Redaelli, S
Salvant, B
Strubin, P
Veness, R
Vollinger, C
Weterings, W
author_facet Métral, E
Aberle, O
Assmann, R W
Baglin, V
Barnes, M J
Berrig, O E
Bertarelli, A
Bregliozzi, G
Calatroni, S
Carra, F
Caspers, F
Day, H A
Ferro-Luzzi, M
Gallilee, M A
Garion, C
Garlasche, M
Grudiev, A
Jimenez, J M
Jones, R
Kononenko, O
Losito, R
Nougaret, J L
Parma, V
Redaelli, S
Salvant, B
Strubin, P
Veness, R
Vollinger, C
Weterings, W
author_sort Métral, E
collection CERN
description Beam-induced RF heating has been observed in several LHC components when the bunch/beam intensity was increased and/or the bunch length reduced. In particular eight bellows, out of the ten double-bellow modules present in the machine in 2011, were found with the spring, which should keep the RF fingers in good electrical contact with the central insert, broken. Following these observations, the designs of all the components of the LHC equipped with RF fingers have been reviewed. The lessons learnt and mitigation measures are presented in this paper.
id cern-1588128
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-15881282019-09-30T06:29:59Zhttp://cds.cern.ch/record/1588128engMétral, EAberle, OAssmann, R WBaglin, VBarnes, M JBerrig, O EBertarelli, ABregliozzi, GCalatroni, SCarra, FCaspers, FDay, H AFerro-Luzzi, MGallilee, M AGarion, CGarlasche, MGrudiev, AJimenez, J MJones, RKononenko, OLosito, RNougaret, J LParma, VRedaelli, SSalvant, BStrubin, PVeness, RVollinger, CWeterings, WLessons Learnt and Mitigation Measures for the CERN LHC Equipment with RF fingersAccelerators and Storage RingsBeam-induced RF heating has been observed in several LHC components when the bunch/beam intensity was increased and/or the bunch length reduced. In particular eight bellows, out of the ten double-bellow modules present in the machine in 2011, were found with the spring, which should keep the RF fingers in good electrical contact with the central insert, broken. Following these observations, the designs of all the components of the LHC equipped with RF fingers have been reviewed. The lessons learnt and mitigation measures are presented in this paper.CERN-ACC-2013-0157oai:cds.cern.ch:15881282013-05-12
spellingShingle Accelerators and Storage Rings
Métral, E
Aberle, O
Assmann, R W
Baglin, V
Barnes, M J
Berrig, O E
Bertarelli, A
Bregliozzi, G
Calatroni, S
Carra, F
Caspers, F
Day, H A
Ferro-Luzzi, M
Gallilee, M A
Garion, C
Garlasche, M
Grudiev, A
Jimenez, J M
Jones, R
Kononenko, O
Losito, R
Nougaret, J L
Parma, V
Redaelli, S
Salvant, B
Strubin, P
Veness, R
Vollinger, C
Weterings, W
Lessons Learnt and Mitigation Measures for the CERN LHC Equipment with RF fingers
title Lessons Learnt and Mitigation Measures for the CERN LHC Equipment with RF fingers
title_full Lessons Learnt and Mitigation Measures for the CERN LHC Equipment with RF fingers
title_fullStr Lessons Learnt and Mitigation Measures for the CERN LHC Equipment with RF fingers
title_full_unstemmed Lessons Learnt and Mitigation Measures for the CERN LHC Equipment with RF fingers
title_short Lessons Learnt and Mitigation Measures for the CERN LHC Equipment with RF fingers
title_sort lessons learnt and mitigation measures for the cern lhc equipment with rf fingers
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1588128
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