Upgrading the SPS Fast Extraction Kicker Systems for HL-LHC

Barnes, Michael; Beck, Mario; Day, Hugo; DucimetiÃ¨re, Laurent; Garcia-Tabares Valdivieso, Elisa; Goddard, Brennan; Neupert, Holger; Romano, Annalisa; Vega Cid, Lorena; Weterings, Wim; Zannini, Carlo

doi:10.18429/JACoW-IPAC2017-WEPVA097

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RIS citation export for WEPVA097: Upgrading the SPS Fast Extraction Kicker Systems for HL-LHC

TY - CONF
AU - Barnes, M.J.
AU - Beck, M.S.
AU - Day, H.A.
AU - DucimetiÃ¨re, L.
AU - Garcia-Tabares Valdivieso, E.
AU - Goddard, B.
AU - Neupert, H.
AU - Romano, A.
AU - Vega Cid, L.
AU - Weterings, W.J.M.
AU - Zannini, C.
ED - Schaa, Volker RW
ED - Arduini, Gianluigi
ED - Pranke, Juliana
ED - Seidel, Mike
ED - Lindroos, Mats
TI - Upgrading the SPS Fast Extraction Kicker Systems for HL-LHC
J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017
C1 - Copenhagen, Denmark
T2 - International Particle Accelerator Conference
T3 - 8
LA - english
AB - The CERN SPS has two fast extraction systems, each consisting of travelling wave kicker magnets (MKEs). The beam induced heating in the ferrite yoke of these magnets was historically kept to an acceptable level by implementing water cooling of the kicker magnets: in addition serigraphy was applied on the surfaces of the ferrite yoke facing the beam. Nevertheless, high intensity beams needed in the future for HL-LHC will significantly increase the beam induced heating, potentially raising the MKE ferrite yoke temperature to its Curie point. Hence detailed studies of longitudinal beam coupling impedance were carried out to identify simple but effective methods of further reducing beam induced power deposition. Based on the results of these studies, and in the framework of the LHC Injectors Upgrade (LIU) project, an upgraded MKE kicker magnet was installed during the 2015-2016 shutdown. This paper reports and compares results of predictions, laboratory measurements, temperature measurements during SPS operation, and machine development studies. Measurements of both dynamic pressure rise in the upgraded magnet and Secondary Electron Yield, on samples, are also reported.
PB - JACoW
CP - Geneva, Switzerland
SP - 3483
EP - 3486
KW - kicker
KW - impedance
KW - electron
KW - extraction
KW - resonance
DA - 2017/05
PY - 2017
SN - 978-3-95450-182-3
DO - 10.18429/JACoW-IPAC2017-WEPVA097
UR - http://jacow.org/ipac2017/papers/wepva097.pdf
ER -