TS3 preparatory meeting A.Tauro

General information LHC-TS3: from Mon 9 6am, to Fri 13 5pm LHC beam stops on Mon morning at 6:00 AM. Cavern access starts at 9:00 AM, after the RP check. – Switch off both magnets: 6:00 AM  SL – take out interlock keys – RP check: 8:30 - 9:00  Andre Access mode: automatic restricted (with token) The underground access will stop on Fri at 16:00 PM Tunnel access (around P2): from Monday midday to Friday midday. NO access to triplets area (ADC) 28/08/15TS3 preparatory meeting2

UX25 access Access possible from Mon 9:00 to Fri 16:00 except the following slots: – UX25: Wed between 6:00 AM and 8:00 AM: siren and evacuation button test (GS-ASE) Fri between 6:00 AM and 8:00 AM: cavern lift maintenance (EN-HE) – L3: Mon between 9:30 AM and 11:00 AM : confined space course – Miniframe: No access  check with Arturo 28/08/15TS3 preparatory meeting3

Detector activities ITS: services verifications TPC: – laser maintenance – access a few IROCs on the upper A side to make sure the HV connection is ok (half day) MCH: – change one quadrant on station 2, CH3L (Indian colleagues) – change few slats: one on CH5L and others on CH7R and CH8R (if possible) – Nacelle needed on I-side MTG: minor maintenance activities foreseen: – one noisy trigger cable. A diagnostic in-situ is needed but we'll probably have to replace the connector(s) – one faulty FE card. We'll need to open MT12-outside in order to access the card and then we'll probably install a spare (from nacelle or scaffolding) – (PH-DT): replace membrane on gas pump (switch to spare, stop 20’) 28/08/15TS3 preparatory meeting4

Detector activities PHOS: – Dismount the PHOS STU, change the SIU card and mount STU back, then test the fiber connection – Hopefully for the task we (2-3 person) need 1-2 days access to L3 (9.11 afternoon and are preferable) EMC/DCA: – Check FECs and TRUs – Install the SRU cooling prototype (Wed) – We need at least 3 days (6 shifts) of access, if possible, and a watcher will be provided, if needed Т0: minor maintenance activities foreseen – Investigation problems in restore_after_ramp (access to C-racks) CTP: change INT board 28/08/15TS3 preparatory meeting5

Detector activities TOF: – Rack O30 to be checked by EN-EL (two PSs and one notch filter in this rack found damaged) (with Andre) After this intervention: – check/replacement of CAEN 48V Power Supply A3485A – Install two CAEN notch filters NF3000 – Three HV connectors to be reworked inside L3 (sectors A-03 and C-12). Welding needed: smoke detection off? – Replacement of 3 DCDC converters in sector C-05, C-10 and C-16. – Finalize Ethernet redundancy (connect power supply) TRD: routine checks and maintenance operations (outside L3) – Cleaning cooling pipes of some Wiener PS (access to galleries I and O side) – Routine check of all Ethernet switches and MUXes (access to galleries I and O side, and C-area) – Inspection of optical fibers at the GTU (access to C-area) 28/08/15TS3 preparatory meeting6

L3 access Watcher in bold 28/08/15TS3 preparatory meeting7 MonTueWedThuFri AM shift (9:00 – 12:30) PHOS/DCA /TOF DCA/PHO/ TOF DCA PM shift (13:30 – 17:00) PHOS/DCA PHOS/DCA /TOF DCA/PHO/ TOF DCA

EN-CV-DC activities TS3 28/08/15TS3 preparatory meeting8 TaskDaysSystem affectedComment Filling of the systems10/11/15 morning SSD/SDD – TPC – TRD - TOFFilling in run Replacement of the mixed flowmeter and valve 10/11/15 afternoon HMPIDWill stop the system Check of the filtration loop 11/11/15TRDReplacement of the demineralized cartridge if necessary Visual check + swap of the circulation pump 11/11/15SPDNeed to be discussed Replacement of communication modules 10/11/15AllWILL STOP COOLING PLANTS HALF DAY – MON PM

DCS Usual maintenance (implying restart of all projects) on the Monday morning (09h-13h). In addition we request (again as usual) a test with all detectors (ramp up, ramp down, simulated handshake etc.) towards the end of the TS to be sure nothing was 'broken'. 28/08/15TS3 preparatory meeting9

Other activities SPIE: complete connection work on one box (work not completed in TS2) ? Vibration measurements (tbc) Sarvadon: acoustic wall L3 power converter (SX2) EN-HE: install crane electronics (Mon AM) + load test cavern cranes (Tue, half day) EN-HE: VIC lift replacement (Tue 9:30, no interruption) TE-VSC: GIS table inspection IT-CS – (+Arturo+Andre): inspection cabling work inside L3 – Mon 9:15 – TETRA measurements on air in ALICE cavern (UX25) and PX24 lift GS-ASE: – Maintenance fire detection systems – Maintenance gas detection systems (SG2/CR5/UX25) – Mon, no impact for ALICE – SNIFFER maintenance – Mon, no impact for ALICE 28/08/15TS3 preparatory meeting10

Other activities EN-CV: – Maintenance ‘puisard eaux usees’ – Replacement belt on UAPX-282 – Test alarm on all ventilation units: uapx (PMD), uapx (MCH1-2), uapx (MCH ST3+MTG), uudc (extraction MCH ST4-5), uudc (extraction MTG) – (with SPIE) Inspection routing ITS ventilation pipe (installation in YETS, week 3) EN-EL: – Install cables new PX24 lift (tbc) – UPS battery test: 1.UPS transfer Off-line = transfer to Bypass source with no interruption (but battery backup still available thanks to 2nd UPS in operation) 2.Firmware upgrade 3.Preventive maintenance 4.Battery measurements 5.UPS transfers back ON-line once preventive maintenance completed 28/08/15TS3 preparatory meeting11

Activities – P2 tech Philippe: – Install one DCal SRU cooling prototype (top A-side) - Wed – Install 4th air duct PHOS SRU crate + inspection with SPIE for final solution – (with Arturo/Albin and if needed Viktor) install the main N2 line inside L3 up to ITS manifold C3 Arturo + Elisa: visit PP4 Yannick: check TPC transfer rails 28/08/15TS3 preparatory meeting12

Visits No underground visits TS3 28/08/15TS3 preparatory meeting13