TE-MSC activities in SPS during LS2 J. Bauche, on behalf of the TE-MSC team, 19th July 2017. https://indico.cern.ch/event/654109/

Outline Magnet maintenance program Magnet test campaign at the start of LS2 Magnet patrol and HV test of main magnets Thermal inspections Planning of test period Magnet maintenance activities Magnet exchanges Standard maintenance LIU activities aC coating LSS1-LSS5 layout modification for new beam dump J. Bauche, TE-MSC, 18/07/2017

Master Schedule of the LS2 Start of Access to the SPS 19.5 months Closure of the SPS

Magnet maintenance program MNC magnet maintenance program in IEF Beam operation: intervention 24h/24 (piquet + experts) Short TS: systematic visual inspections; corrective maintenance Year End TS: previous + audio-visual inspection in pulsed mode; electrical tests; preventive maintenance; small consolidations Long Shutdowns: previous + thermal inspections; large consolidations; major activities in highly radioactive areas Associated with suitable spare policy Continuous refurbishment of large magnet families with few spares Certification program to prepare spares “ready to install”  Ultimate goal: mitigate MTTR and MTBF J. Bauche, TE-MSC, 18/07/2017

Inspection “Magnet Patrol” (PLAN 10987) Magnet test campaign Inspection “Magnet Patrol” (PLAN 10987) To detect coil movements in main magnets and transfer line quadrupoles Removal of the magnet covers Audio-visual inspection in pulsed mode Machine conditions Machine closed to non-MNC personnel during tests Power, cooling, interlocks, access operational Access system in «Magnet Patrol» mode Support from other groups BE/OP to power the magnets and lock the accesses All other teams ready to intervene in case of system/service failure (EPC, EL, MPE, ICS, CV, etc…) J. Bauche, TE-MSC, 18/07/2017

High voltage tests (PLAN 10987) Magnet test campaign High voltage tests (PLAN 10987) To detect weaknesses in main magnet circuits insulation Main dipoles and quadrupoles (962 units) Busbars and water cooled cables are tested together with the magnets! Machine conditions Machine closed, in dedicated configuration (CIS system of EPC) Cooling circuits running Separation of power converters from load Test +/- 6kV on dipole and +/- 4 kV on quadrupole circuits, from BA3 In case of failure, localization in the machine, repair, and re-test Support from other groups TE/EPC for CIS configuration + HV test bench BE/OP for access control J. Bauche, TE-MSC, 18/07/2017

Magnet test campaign Thermal inspections (PLAN 10987)  To detect clogged cooling circuits or untightened electrical connections Removal of the magnet covers Powering of magnets after heat run period Inspection with thermal camera Machine conditions Machine closed to non-MNC personnel Power, cooling, interlocks, access operational Support from other groups BE/OP to power the magnets and for access control TE/EPC support for power converters operation Loose electrical connection Clogged cooling circuits J. Bauche, TE-MSC, 18/07/2017

Magnet test campaign Planning Necessity to open all magnet covers to perform the tests and inspections (incl. thermal imaging)  access restrictions Necessity have all technical services running as during operation  done at the start of LS2 Preliminary planning proposed similar to LS1, with access reserved for MSC team: 4 weeks in SPS safety chain1 area 3 weeks in other SPS safety chains J. Bauche, TE-MSC, 18/07/2017

Preventive / corrective exchange of main magnets Magnet system maintenance Preventive / corrective exchange of main magnets (PLAN 10989) Expected 10 to 15 main magnets to be replaced Based on inspection campaign results Aperture restrictions to be considered Machine conditions Free access to material lift and passage for transport equipment Support from other groups EN/HE, TE/VSC, EN/ACE/SU Inputs from BE/OP for aperture restrictions Planning to be discussed with coordination Main magnet replacement J. Bauche, TE-MSC, 18/07/2017

Magnet system maintenance Magnet general maintenance (PLAN 10988)  Corrective / preventive maintenance Repair of magnets non-conformities in-situ Cleaning of all magnet filters, gasket exchanges Busbar system inspection, cleaning of salpeter under covers Machine conditions Activities transparent for other teams Support from other groups None Activity distributed over the whole LS1 duration, ending with the most radioactive zones Clogged filter Broken pole shim J. Bauche, TE-MSC, 18/07/2017

Removal / reinstallation of magnets for aC coating LIU activities Removal / reinstallation of magnets for aC coating (PLAN 11002 and 11003) Magnets removed from machine for aC coating and Impedance reduction program Details in TE-VSC presentation (https://indico.cern.ch/event/647414/) MBB (44 units in sextants 5 & 6) and QF (90 units in all sextants) will be aC treated in-situ QF SSS (90 units in 6 sextants) and QD SSS (11 units in sextants 5 & 6) will be dismantled and aC treated ex-situ QD (11 units in sextants 5 & 6) will be aC treated ex-situ Machine conditions Free access to material lift and passage for transport equipment Support from other groups EN/HE, TE/VSC, EN/ACE/SU Planning to be discussed with coordination J. Bauche, TE-MSC, 18/07/2017

Layout modification for new beam dump in LSS5 LIU activities Layout modification for new beam dump in LSS5 (PLAN 10754) 20 magnets relocated for layout modification In LSS1 and LSS5 (Details and locations in next slides) Modification of supports, cabling, etc. Magnet transports between LSS1 and LSS5 Recommissioning of all impacted circuits at the end of LS2, when infrastructure is back in service (power, cooling, etc.) Machine conditions Free access to material lift and passage for equipment transport Support from other groups EN/HE, TE/VSC, EN/ACE/SU for magnet relocation TE-EPC, TE-MPE for circuit recommissioning Planning to be discussed with coordination J. Bauche, TE-MSC, 18/07/2017

LIU activities  Layout comparison (from SRR) J. Bauche, TE-MSC, 18/07/2017

LIU activities Summary of magnet movements for beam dump relocation Displacement of correcting dipole MDV 11705 (+ BPM) to position 11706 Installation of correcting dipole MDH (+ BPM) in position 11807 Displacement of correcting dipole MDH 51807 (+ BPM) to half period 518 Displacement of correcting dipole MDV 51907 (+ BPM) to position 51930 Replacement of large aperture QFA 11710 by normal aperture QF 11710 Replacement of large aperture QFA 11810 by normal aperture QF 11810 Replacement of normal aperture QF 51810 by large aperture QFA 51810 Relocation of Type-D horizontal correcting dipole MDHD 11832 in position 51832 Removal of unused correcting dipole MDHW 51633 and correcting dipole MDVW 51732 Relocation of eCloud test bench (MDHW 51832, MDHW 51836, MDHW 51838, MDHW 51853 wiggler dipoles and associated vacuum equipment + correcting dipoles MDPH 51753 and MDPH 51754) to half period 117 between position 11732 and 11757 Displacement of vertical Beam Ionization Profile Monitor (BIPM) instrument (MDVW 51734, MDVW 51736, BIPMV 51734 and MDVB 51777) to half period 519 J. Bauche, TE-MSC, 18/07/2017

Other activities SPS AWAKE HL-LHC - Installation of crab cavities in LSS6  Removal of enlarged quadrupole and modification of supports, TBC LIU-RF upgrade – Layout modification of RF Removal of quadrupoles in LSS3 Possible modification of busbar covers along LSS3, TBC with integration studies Replacement of all orbital corrector power supplies Recommissioning of MDH/MDV magnets circuits Replacement of all PU jacks with new mechanical ones (TBC)  Insulation tests yoke-earth for the 216 main quadrupoles Realignment of TT20 (TBC)  May require replacement of some supports by shorter ones AWAKE Modification of plasma cell  Modification of secondary beam line layout, TBC J. Bauche, TE-MSC, 18/07/2017