Measurement of the Residual Resistivity Ratio of the Bus Bars Copper Stabilizer of the 13 kA Circuits of the LHC

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After the incident of September 2008, the operational beam energy of the LHC has been set to 3.5 TeV, since not all joints of the superconducting (SC) bus bars between magnets have the required quality for 7 TeV operation. This decision is based on simulations to determine the safe current in t...

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Autores principales: Apollonio, A, Koratzinos, M, Solfaroli Camillocci, M, Schmidt, R, Verweij, A, Siemko, A, Claudet, S, Steckert, J, Thiesen, H
Lenguaje:eng
Publicado: 2012
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/1558348
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author Apollonio, A
Koratzinos, M
Solfaroli Camillocci, M
Schmidt, R
Verweij, A
Siemko, A
Claudet, S
Steckert, J
Thiesen, H
author_facet Apollonio, A
Koratzinos, M
Solfaroli Camillocci, M
Schmidt, R
Verweij, A
Siemko, A
Claudet, S
Steckert, J
Thiesen, H
author_sort Apollonio, A
collection CERN
description After the incident of September 2008, the operational beam energy of the LHC has been set to 3.5 TeV, since not all joints of the superconducting (SC) bus bars between magnets have the required quality for 7 TeV operation. This decision is based on simulations to determine the safe current in the main dipole and quadrupole circuits, reproducing the thermal behaviour of a quenched superconducting joint by taking into account all relevant factors that affect a possible thermal runaway. One important parameter is the Residual Resistivity Ratio (RRR) of the copper stabilizer of the bus bar connecting the superconducting magnets. A dedicated campaign to measure the RRR for the main 13 kA circuits of the LHC in all sectors was performed during the Christmas stop in December 2010 and January 2011. The measurement method as well as the data analysis and results are presented in this paper.
id cern-1558348
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
record_format invenio
spelling cern-15583482019-09-30T06:29:59Zhttp://cds.cern.ch/record/1558348engApollonio, AKoratzinos, MSolfaroli Camillocci, MSchmidt, RVerweij, ASiemko, AClaudet, SSteckert, JThiesen, HMeasurement of the Residual Resistivity Ratio of the Bus Bars Copper Stabilizer of the 13 kA Circuits of the LHCAccelerators and Storage RingsAfter the incident of September 2008, the operational beam energy of the LHC has been set to 3.5 TeV, since not all joints of the superconducting (SC) bus bars between magnets have the required quality for 7 TeV operation. This decision is based on simulations to determine the safe current in the main dipole and quadrupole circuits, reproducing the thermal behaviour of a quenched superconducting joint by taking into account all relevant factors that affect a possible thermal runaway. One important parameter is the Residual Resistivity Ratio (RRR) of the copper stabilizer of the bus bar connecting the superconducting magnets. A dedicated campaign to measure the RRR for the main 13 kA circuits of the LHC in all sectors was performed during the Christmas stop in December 2010 and January 2011. The measurement method as well as the data analysis and results are presented in this paper.oai:cds.cern.ch:15583482012
spellingShingle Accelerators and Storage Rings
Apollonio, A
Koratzinos, M
Solfaroli Camillocci, M
Schmidt, R
Verweij, A
Siemko, A
Claudet, S
Steckert, J
Thiesen, H
Measurement of the Residual Resistivity Ratio of the Bus Bars Copper Stabilizer of the 13 kA Circuits of the LHC
title Measurement of the Residual Resistivity Ratio of the Bus Bars Copper Stabilizer of the 13 kA Circuits of the LHC
title_full Measurement of the Residual Resistivity Ratio of the Bus Bars Copper Stabilizer of the 13 kA Circuits of the LHC
title_fullStr Measurement of the Residual Resistivity Ratio of the Bus Bars Copper Stabilizer of the 13 kA Circuits of the LHC
title_full_unstemmed Measurement of the Residual Resistivity Ratio of the Bus Bars Copper Stabilizer of the 13 kA Circuits of the LHC
title_short Measurement of the Residual Resistivity Ratio of the Bus Bars Copper Stabilizer of the 13 kA Circuits of the LHC
title_sort measurement of the residual resistivity ratio of the bus bars copper stabilizer of the 13 ka circuits of the lhc
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1558348
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