2. TE-MSC activities in SPS during LS2
J. Bauche, on behalf of the TE-MSC team, 19th July 2017.

3. 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

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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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

12. Removal / reinstallation of magnets for aC coating
LIU activities
Removal / reinstallation of magnets for aC coating
(PLAN and 11003)
Magnets removed from machine for aC coating and Impedance reduction program
Details in TE-VSC presentation (
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

13. 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

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

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

16. 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