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TREX meeting (Zoom) [ZDC cabling for Run3, Storage management]
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TREX meeting (Zoom)
Preliminary minutes of the TREX 04-03-22
1. ECR for ZDC cabling installation for Run 3
- Francisco mentioned request/information from J.P. Corso for the cable integration (... Francisco please complete).
- Presentation given by Sorina Popescu (ECR 2711613; LHC-X5ZDC-EC-0004).
- Motivation for the change is to minimize radiation damage of the optical fibers, provide better grounding for the electronics and services and meet physics objectives (please see the ECR).
- Content of the work is relocation of the equipment from LHC tunnel to UJ 53-57 bunkers. New routing for signal and HV cables is needed.
- Time schedule - installation to be performed before the ion run 2022 -> TS1+TS2.
Discussion:
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Q-FSG - Is there a request for a new AUG within the bunker?
A-SP - No, there is no need for this.
A-WZ - To be checked with HSE if it is fine in terms of the safety with respect to the HV installation (question to be addressed).
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Q-PF - Concerning Run 4 integration. Recalling that all the cables needs to be removed for HL-LHC activities and reinstalled after
A-SP OK for the ZDC team.
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Q-JW- Opening of the sealing or using existing duct? To pull the cables is the scaffolding needed on the side of cryo-line (cryo will be operational)? Are the cables sufficiently RadHard?
A-SP - Existing duct will be used, no extra opening in the wall.
A-PBB - work behind the beamline is needed. Exceptional authorization.
A-WZ - destructive work (drilling was already done). Installation of the mini-racks can be still done in advance.
A-SP - cables are supposed to be RadHard (CMS expert confirmed).
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Q-JS - In case of over BP activities TE-VSC should be informed about the activity to avoid work at the sensitive environment + vacuum valves must stay closed during the intervention.
A- PBB - VSC will be informed for purpose of the VIC.
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Q- MBM - routing is supposed to go behind the TAN, is this fine during the TS after p-p run (potential RP issue)?
A- PBB - 1day for pulling + extra time for connectors;
Comment-MM - Installation of the fibers in the bunker is irreversible in terms of ZDC operations. Once this is done we need to go ahead.
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Q-WZ - Radiation cables - what is going to be used for the installation and how is it within the baseline of the LHC?
A- PBB - standard solution for radiation areas will be used (to be confirmed).
A-PF only tempo solution, there is this HL-LHC RadHard cables strategy (previous TREX).
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FSG - OK for the LMC approval.
2. Space management at the UJ bunker for Run 3 & 4
- Presentation given by Francisco Sanchez Galan.
- Recall on the space management purpose, access etc.
- Bunkers used for storage BRAN & ZDC.
- There will be new sarco after LS3 - compatibility with the logistics to be checked.
- Need for active space management?
Discussion:
Comment - SP - bunkers exclusively build for purpose of the experiments (sarco storage).
Comment - MM - CMS sarco to be declared as waste.
General discussion - How to indicate occupancy of the bunker for the access (can be done easily via INFOR?)
Comment - MM - it will be great is the TREX can initiate the discussion with RP and experiments for waste management.
3. AOB
No AOB addressed.
Minutes written by JS - 04-03-2022
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