Machine Protection Aspects of High-Voltage Flashovers of the LHC Beam Dump Dilution Kickers

Wiesner, Christoph; Bartmann, Wolfgang; Bracco, Chiara; Calviani, Marco; Carlier, Etienne; Ducimetière, Laurent; Frankl, Matthias; Fraser, Matthew; Gilardoni, Simone; Goddard, Brennan; Gomes Namora, Vasco; Kramer, Thomas; Lechner, Anton; Magnin, Nicolas; Meddahi, Malika; Perillo-Marcone, Antonio; Polzin, Tobias; Richtmann, Lea; Rizzoglio, Valeria; Senaj, Viliam; Somoza, Jose; Wollmann, Daniel

doi:10.18429/JACoW-IPAC2019-WEPMP040

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RIS citation export for WEPMP040: Machine Protection Aspects of High-Voltage Flashovers of the LHC Beam Dump Dilution Kickers

TY  - CONF
AU  - Wiesner, C.
AU  - Bartmann, W.
AU  - Bracco, C.
AU  - Calviani, M.
AU  - Carlier, E.
AU  - Ducimetière, L.
AU  - Frankl, M.I.
AU  - Fraser, M.A.
AU  - Gilardoni, S.S.
AU  - Goddard, B.
AU  - Gomes Namora, V.
AU  - Kramer, T.
AU  - Lechner, A.
AU  - Magnin, N.
AU  - Meddahi, M.
AU  - Perillo-Marcone, A.
AU  - Polzin, T.
AU  - Richtmann, L.C.
AU  - Rizzoglio, V.
AU  - Senaj, V.
AU  - Somoza, J.A.F.
AU  - Wollmann, D.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Machine Protection Aspects of High-Voltage Flashovers of the LHC Beam Dump Dilution Kickers
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The LHC Beam Dump System is required to safely dispose of the energy of the stored beam. In order to reduce the energy density deposited in the beam dump, a dedicated dilution system is installed. On July 14, 2018, during a regular beam dump at 6.5 TeV beam energy, a high-voltage flashover of two vertical dilution kickers was observed, leading to a voltage breakdown and reduced dilution in the vertical plane. It was the first incident of this type since the start of LHC beam operation. In this paper, the flashover event is described and the implications analysed. Circuit simulations of the current in the magnet coil as well as simulations of the resulting beam sweep pattern are presented and compared with the measurements. The criticality of the event is assessed and implications for future failure scenarios are discussed.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2418
EP  - 2421
KW  - kicker
KW  - operation
KW  - simulation
KW  - vacuum
KW  - high-voltage
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPMP040
UR  - http://jacow.org/ipac2019/papers/wepmp040.pdf
ER  -