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Upgrade of the LHC Injection Kicker Magnets

Two LHC injection kicker systems, each comprising 4 magnets per ring, produce a kick of 1.3 T·m with a rise-time of less than 900 ns and a flattop ripple of less than ±0.5%. A beam screen is placed in the aperture of each magnet, to provide a path for the image current of the LHC beam and screen the...

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Autores principales: Barnes, M J, Adraktas, P, Baglin, V, Bregliozzi, G, Caspers, F, Calatroni, S, Day, H, Ducimetière, L, Garlaschè, M, Gomes Namora, V, Jimenez, J M, Magnin, N, Mertens, V, Métral, E, Salvant, B, Taborelli, M, Uythoven, J, Weterings, W
Lenguaje:eng
Publicado: 2013
Materias:
Acceso en línea:http://cds.cern.ch/record/1574598
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author Barnes, M J
Adraktas, P
Baglin, V
Bregliozzi, G
Caspers, F
Calatroni, S
Day, H
Ducimetière, L
Garlaschè, M
Gomes Namora, V
Jimenez, J M
Magnin, N
Mertens, V
Métral, E
Salvant, B
Taborelli, M
Uythoven, J
Weterings, W
author_facet Barnes, M J
Adraktas, P
Baglin, V
Bregliozzi, G
Caspers, F
Calatroni, S
Day, H
Ducimetière, L
Garlaschè, M
Gomes Namora, V
Jimenez, J M
Magnin, N
Mertens, V
Métral, E
Salvant, B
Taborelli, M
Uythoven, J
Weterings, W
author_sort Barnes, M J
collection CERN
description Two LHC injection kicker systems, each comprising 4 magnets per ring, produce a kick of 1.3 T·m with a rise-time of less than 900 ns and a flattop ripple of less than ±0.5%. A beam screen is placed in the aperture of each magnet, to provide a path for the image current of the LHC beam and screen the ferrite yoke against wake fields. The screen consists of a ceramic tube with conductors in the inner wall. The initially implemented beam screen ensured a low rate of electrical breakdowns and an adequately low beam coupling impedance. Operation with increasingly higher intensity beams, stable for many hours at a time, has resulted in substantial heating of the ferrite yoke, sometimes requiring cool-down over several hours before the LHC can be refilled. During the long shutdown in 2013/2014 all eight kicker magnets will be upgraded with an improved beam screen and an increased emissivity of the vacuum tank. In addition equipment adjacent to the injection kickers and various vacuum components will be modified to reduce the vacuum pressure near to the kickers during high-intensity operation. This paper discusses the upgrades.
id cern-1574598
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
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spelling cern-15745982019-09-30T06:29:59Zhttp://cds.cern.ch/record/1574598engBarnes, M JAdraktas, PBaglin, VBregliozzi, GCaspers, FCalatroni, SDay, HDucimetière, LGarlaschè, MGomes Namora, VJimenez, J MMagnin, NMertens, VMétral, ESalvant, BTaborelli, MUythoven, JWeterings, WUpgrade of the LHC Injection Kicker MagnetsAccelerators and Storage RingsTwo LHC injection kicker systems, each comprising 4 magnets per ring, produce a kick of 1.3 T·m with a rise-time of less than 900 ns and a flattop ripple of less than ±0.5%. A beam screen is placed in the aperture of each magnet, to provide a path for the image current of the LHC beam and screen the ferrite yoke against wake fields. The screen consists of a ceramic tube with conductors in the inner wall. The initially implemented beam screen ensured a low rate of electrical breakdowns and an adequately low beam coupling impedance. Operation with increasingly higher intensity beams, stable for many hours at a time, has resulted in substantial heating of the ferrite yoke, sometimes requiring cool-down over several hours before the LHC can be refilled. During the long shutdown in 2013/2014 all eight kicker magnets will be upgraded with an improved beam screen and an increased emissivity of the vacuum tank. In addition equipment adjacent to the injection kickers and various vacuum components will be modified to reduce the vacuum pressure near to the kickers during high-intensity operation. This paper discusses the upgrades.CERN-ACC-2013-0077oai:cds.cern.ch:15745982013-07-31
spellingShingle Accelerators and Storage Rings
Barnes, M J
Adraktas, P
Baglin, V
Bregliozzi, G
Caspers, F
Calatroni, S
Day, H
Ducimetière, L
Garlaschè, M
Gomes Namora, V
Jimenez, J M
Magnin, N
Mertens, V
Métral, E
Salvant, B
Taborelli, M
Uythoven, J
Weterings, W
Upgrade of the LHC Injection Kicker Magnets
title Upgrade of the LHC Injection Kicker Magnets
title_full Upgrade of the LHC Injection Kicker Magnets
title_fullStr Upgrade of the LHC Injection Kicker Magnets
title_full_unstemmed Upgrade of the LHC Injection Kicker Magnets
title_short Upgrade of the LHC Injection Kicker Magnets
title_sort upgrade of the lhc injection kicker magnets
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1574598
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