1. Q1-Q2, Q2-Q3 Interconnect Zone Disconnection Q1 Magnet Extraction
Address an overall sequence of activities required for a Q1 magnet removal
Together, where available, with an estimate of resources needed to complete them
“Clean” removal leaving the zone immediately ready for the replacement magnet
IP-Q1 disconnection is not covered here
We illustrate a sequence with the case of the Q1 Triplet magnet
Where we believe Q3 does not need to be moved (to be verified).
Particular case involving the most special machinery at multiple stages –for disconnection at the Interconnect zones and in particular for extraction
One of the most activated LHC magnets; a condition that will have major influence on the methods used and resources required

2. F.Micolon - CMI Meeting - 30/05/17
LHC Triplet layout
DFBX Q3 Q2
Interconnection Zone Q3-DFBX Q1
Interconnection Zone Q2-Q3
~35m
Interconnection Zone Q1-Q2
Interconnection Zone IP-Q1
IP (Atlas, CMS, Alice, LHCb)
Smarteam: ST
F.Micolon - CMI Meeting - 30/05/17

3. Inner Triplet Magnets Left of Point 12 4 3

4. Inner Triplet Magnets Left of Point 5

5. Interconnect zones IP-Q1, Q1-Q2 and Q2-Q3
Have rarely (or never) been disconnected but documented estimates exist for:
Ouverture de l’Iinterconnexion Q1-Q2: EDMS
Ouverture de l’Interconnexion Q2-Q3: EDMS
Recently compiled:
Procedure for Removing the LHC Triplets in LSS1, LSS2, LSS5 & LSS8: EDMS
For the interconnect assembly some detailed FNAL documents exist:
Q1-IP Interconnect procedure 5520-OP
Q1-Q2 Interconnect procedure 5520-OP
Q2-Q3 With TAS Interconnect procedure 5520-OP
Q2-Q3 Without TAS Interconnect procedure 5520-OP
Q3-DFBX Interconnect procedure 5520-OP
Some drawings (paper/pdf format) for interconnection Q1-IP, Q1-Q2, Q2-Q3, Q3-DFBX
It is assumed that disconnection ~= inverse of connection

6. Main assembly QI Q2
Disconnection activities here can be carried out with some simple fixtures and relatively common hand tools as detailed in EDMS and EDMS

7. Bellows Protection Half-Shells
Disconnection activities here can be carried out with relatively common hand tools as detailed in EDMS and EDMS

8. Piping Connections
Separation of tubing at flanged interfaces requires specific automatic orbital cutting machines

9. Orbital Cutting Machines Inventory
Courtesy Herve Prin

10. Q1 to Q2 Splice and Spool connections
Consolidation?

11. Comments specific to the LHC triplet Interconnect Zones
The LHC triplet IC zones have rarely been completely disconnected
The layout of the triplet IC zones is substantially different to that of the LHC arc IC zones.
Investment in automatic orbital welding and cutting equipment was not done specifically for the (relatively small) population of LHC triplet interconnect zones
During first assembly, manual welders were employed to make all the piping connections in the triplet IC zones
We do not have orbital S-Steel tube cutting equipment dedicated specifically to the LHC triplets
Some orbital stainless steel tube cutting equipment that we have may be modified to be useable; needs to be checked (flange diameter and space envelope) in detail case by case
Where not useable, other acceptable tube cutting methods will be needed

12. Triplet Magnet Extraction from IP
Has rarely been done
Machinery and procedures exist and have been used very successfully for the first triplet magnet installation(s) (non activated state)
The process requires close human supervision/intervention
Extraction sequence is assumed to be ~= inverse of installation

13. Triplet Installation/Extraction
The extraction procedure we have today
Essentially the inverse of the procedures detailed in EDMS
More than 150 discrete work steps are involved
324 Man-hours to complete
The initial installation of Q1 and Q2 was achieved through a 14 sequence specific procedure as detailed in EDMS above
Equipment and manpower intensive
Space is tight, forcing manpower into close proximity
Courtesy Kurt Artoos

14. Q1 Magnet Extraction
Courtesy Kurt Artoos

15. Q1 Magnet Extraction
Courtesy Kurt Artoos

16. Q1 Magnet Extraction
Courtesy Kurt Artoos

17. Q1 Magnet Extraction
Courtesy Kurt Artoos

18. Q1 Magnet Extraction
Courtesy Kurt Artoos