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TS May 9-12 – Schedule

TS May 9-12 – Schedule. SL instructions: Both magnets ramped down Monday May 9 th 7:00 latest Thursday: check with CCC before restarting magnets:

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TS May 9-12 – Schedule

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  1. TS May 9-12 – Schedule SL instructions: • Both magnets ramped down Monday May 9th 7:00 latest • Thursday: check with CCC before restarting magnets: • TE-EPC will work at the TCR coils, so they will switch off-on the harmonic filter. We should check with the CCC before ramping-up the magnets to avoid having to ramping them down when the filter is switched on again. Schedule of the access: • Mon 8:15: RP survey (David + Yannick) • Mon 9:15: start cavern access • Thu 6:00 to 12:00: load test cavern lift. NO access • Thu 16:00: search L3 and close access Service perturbations: • Tue 9:00 to 15:00: cooling perturbation (mixed and chilled water in the cavern and CR1-4) • Wed-Thu: cleaning heat-exchanger SU2 (limited cooling power = no magnets!)

  2. TS May 9-12 – List of activities TPC: • 4638980 TPC – Replace FEE: 1 RCU and 1 FEC • 4 h inside L3 • 4642057 TPC - Upgrade of TPC HV distribution on 1 sector C-side • 4632781 TPC Laser – Work on laser system • PH-DT TPC Gas - replacing one electrical instrument -a frequency converter- in CR5. The TPC gas system will be stopped for ~1 day. The exact date within the TS is not yet settled ITS: • Refurbish dryer (FISAIR) • Unit disconnected and brought to surface Monday morning • Unit re-connected on Thursday latest. EN-EL to connect it to general services • New air flow-meter (Frederick) • 4641419 SPD - Manual valves replacement at the plant and cleaning of a sector • 4627361 SDD – Replace pressure regulator and pressure sensor • 4643809 SDD - Installation of 2 humidity sensors inside the SDD ventilation tubes from A-side (PP1 of the mini-frame)

  3. TS May 9-12 – List of activities 4644016 TRD – LV connections. L3, sectors 11 and 17 C-side 4643849 TOF - Replace 4 DC-DC converter in sector 0, 7, 12 and 13 4641777 FMD - replace RCU for FMD2 4642110 ACORDE – Fix module 4641861 EMCAL - Electronics checks • Investigate and possibly replace 1 TTC fiber or RCU+DCS board  • Investigate and possible replace 1 TRU trigger board • Investigate and possible replace 1 LED driver module • Update FEE board controllers  • The first 3 items should be completed in a few hours. Item 4) would take about 2 shifts. It's not essential to do item 4), but we would like to do as many FEE boards as we can during this access, and possible complete the task. Muons: • 4639914 Muon TRG - Repair of RPC gas connectors • Need Nacelle and scaffolding • Demount green fences • 4641233 Muon TRG - Maintenance Low Voltage Distribution • 4642061, 4641907 and 4641793 Muon TRK – Repair CROCUS card CH7-O

  4. TS May 9-12 – List of activities • 4635859 Survey - Photogrammetry C-side patch-panels • Watcher needed • 4640933 and 4640939 EN-CV – Cooling plant maintenance and RP analysis • ??? EN-CV – Replace filter UAPX281 • 4641443 and 4641447 EN-HE – Restart cavern crane and finalize PX24 draw bridges work • 4643955 TE-MSC – Inspection compensator magnet • Compensator magnet powered on Tuesday

  5. TS May 9-12 – Technicians activities • 4641695 P2 Technicians – Various interventions • Replace L3 lights (Didier, Philippe) • Trap door L3 (C-O side) • P regulator and P gauge N2 line (CR5) (Philippe, Pascal) • Access ADC (Philippe, Didier) • Inventory interphones and Hazemeyer cavern • Other things to look at: • Tube fire extinguisher (Fernando, Arturo, Dominique) • TOF trigger cables (DCal extension) (Arturo, Andrea) • Evacuation L3: BBF and BKF (trap) paths

  6. TS May 9-12 – DCS and Safety • 4642230 DCS – Various interventions technicians : • Several minor interventions are planned on the DCS system for the technical stop • Intervention on the database on Monday morning (transparent) • DCS interruption on Tuesday morning to preventively change power supplies on some PCs. Afterwards test on restarting some of the central DCS machines (to verify some dependencies), but this will be done only when agreed with RC • Move the machinery that generates the web monitoring pages for DCS to a new machine, the web pages might stop to be updated for a while during this transfer • Fix water leak false alarm • Safety: • 4639352 GS-ASE – Inspection UX25 sirens • GS-ASE – Wednesday & Thursday: periodic maintenance gas detection system (SGGAZ-00141) • Monday 15:00: test red phones • Monday: annual general safety inspection barracks and P2 buildings • Tuesday: ALICE Confined Space Training • Thu 6:00 to 12:00: load test cavern lift. NO access in the cavern

  7. TS May 9-12 – Watcher schedule

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