EYETS planning A Tauro EYETS general info EYETS

EYETS planning A. Tauro

EYETS general info • EYETS duration: from 5 Dec to 30 Apr, 21 weeks beam to beam (w 49 to w 17) • LHC back to BE-OP on Friday 14 th April (powering tests) LHC closed 21 weeks EYETS planning meeting, 2 Dec 2016 - A. Tauro Beam

LHC-EYETS: linear schedule In. Work EYETS planning meeting, 2 Dec 2016 - A. Tauro

Main activities • Replacement cavern lift • Replacement L 3 PC thyristors • Install cable trays (EN-EA-CT) and LS 2 fiber prototypes (EN-EL-CF) • Open L 3 doors • Detectors: • Replace TOF TDC boards, displace 12 modules • Repair broken TRD optical connections • Reprogramming firmware of PHOS trigger units, open one module (LV connection issue). PHOS warmed up mid December, until mid March • Replace FECs on EMCAL and DCAL, shift SRUs • Cryo-regeneration TRD Xe (start 9 January) • Switch TPC gas to Ne (March). Replace broken FEC EYETS planning meeting, 2 Dec 2016 - A. Tauro

W 49 -50 (5 Dec to 18 Dec) W 49: • Beam stopped at 6: 00 AM ramp down both magnets (SL) • RP survey: Uli Fuchs between 8: 00 and 9: 00 • ALTEAD: remove shielding (PX 24, UX 25) • • • Reinstall crane electronics, remove stabilizers, bring nacelles down Weld valve on N 2 pipe (SG 2) on Mon stop N 2 dewar (batteries) TE-VSC: close manual valve on Mon 9: 00 Mon: inspection for cable-trays work (Gianluca Canale + EL) Confined space training session on Tue. 13. 12. 2016, 14: 00 – 17: 00 TPC (Chilo): remove wood GEM IROC EN-MME: remove accelerometers cables and instruments (tbc) Visitor centre: test ventilation control – whole week Wed 17: 30, 2 private visits Thu 14: 40, protocol visit “CH FR Signature tripartite”– passage via PX 24 Fri 17: 30, 2 private visits W 50: • ALTEAD+P 2 tech: open L 3 doors • Remove L 3 and PMD ventilation, lift PMD crocus • Wed 8: 00 – 10: 00: CR lift maintenance – possible? UX 25 access after working hours (17: 30 onwards) No access CR 5 Mon-Tue w 49 EYETS planning meeting, 2 Dec 2016 - A. Tauro

W 51 -1 (19 Dec to 8 Jan) • EN-HE: PX 24 lift replacement • UX 25 access via PM 25 • Rescue mask training required to access PM 25 (and UX 25) from 19 Dec to 4 Jan • CERN closure: 22 Dec - 4 Jan no access P 2 • Daily tours surface and underground • Safety test: 30 Dec no access UX 25 W 51: • • Mon: request PX 24 PM 25 switchover (Klaus) Mon: inspection survey (beampipe, PHOS) Inspection TOF supports (Yannick) Wed: restore normal access to CR (no longer from outside) Lift replacement schedule EYETS planning meeting, 2 Dec 2016 - A. Tauro

Inspection rounds during CERN closure • As every year a daily inspection will done at P 2 during CERN End of Year closure (22. 12 – 04. 01) • Thanks to all people listed below! • Inspection of SX 2 (ARC), CRs, SG and Cavern • Remote monitoring of infrastructure and equipment remains possible (DCS is available) • Contact Andre if there is anything special you want to be checked • Provisional schedule: Thu Fri Sat Sun Mon Tue Wed 22 -Dec 23 -Dec 24 -Dec 25 -Dec 26 -Dec 27 -Dec 28 -Dec Klaus Sasha Chilo Thu Fri Sat Sun Mon Tue Wed 29 -Dec 30 -Dec 31 -Dec 01 -Jan 02 -Jan 03 -Jan 04 -Jan Arturo (safety tests) Andre Arturo Andre EYETS planning meeting, 2 Dec 2016 - A. Tauro

EL, CV and gas activities EL: • • Test secours: 9 Jan between 6: 00 -6: 30 AM – see next slide Test auto-transfer: 4 Feb (10’ interruption on general services) AUG: Mar 16 th – NO ACCESS P 2 whole day Put SLIMOS+DCS console on DCS-UPS after power cut of 18. 9 (Andre) SPIE: • Cable trays for LS 2 fibers (lights, SU support to be displaced) • Pull 2 spare cables + connectors for SSD (CR 4 -UX) (Caterina Deplano) • Pull 2 cables MCR ARC (Pascal Blanc) • Pull 2 cables CV-DC (Yann Lupkins) • Redo test on TPC HV cables, redo connectors if needed (11 January) • All the requests to pull long cables in the cavern during the EYETS (e. g. from CR 4/surface to the cavern) must be submitted before Friday 2 nd December, 2016 (today) Cooling: • • P 2 cooling maintenance: w 9 -10 -11. Stop towers w 11 Detector cooling maintenance: w 10 -11 – see next slide EN-CV: install heat exchanger ITS air duct (C-side) SPIE: re-routing mixed water pipes (racks) side C (Philippe) Gas: • • EP-DT-FS: upgrades to the Gas system Wincc. OA. 1 day in weeks 5 -6 Maintenance gas systems – see excel file EYETS planning meeting, 2 Dec 2016 - A. Tauro

EN-EL: test secours Planned for Monday, 9 th Jan, at 6: 00 AM (10’) For P 2 this will affect: • all buildings including SX 2 and SXL 2 • all offices, meeting rooms, wall outlets, light, coffee machine • the non UPS part of the ARC • the non UPS part of the detector cooling plants (this will trigger interlocks, e. g. LV) • the gas systems (PLCs stopped, interlocks triggered) Albin to stop gas systems beforehand • the circulation of iced and mixed water, ventilation (will restart after the 10 min. interruption) Are NOT affected at P 2: • all equipment on UPS (notably all CRs and inside ARC) • all racks in CR and UX As we do not know if all ventilation will restart OK, we will suspend cavern access until we confirm that all is nominal EYETS planning meeting, 2 Dec 2016 - A. Tauro

Detector cooling RP samples collected on Dec 5 th EYETS planning meeting, 2 Dec 2016 - A. Tauro

Gas (EN-EA-CT) • Stop Ic 4 h 10 and CH 4 on 5 th Dec (stop purge P test/leak test of lines with N 2) • Switch Arcal 15 Arcal 10 on 19 th Dec • Note: gas point facing b. 2270 will be full of bottles. These bottles will be removed: • 1 BT N 2 (14/03/2014, Marraffa) • 2 BT Arcal 21 (15/03/2012) • 2 BT Arcal 5 • 1 BT N 2/CO 2/Ne 4. 80/9. 50/85. 7 keep! • 1 BT Acetylene EYETS planning meeting, 2 Dec 2016 - A. Tauro

Gas system status during EYETS System MCH 61 ST 1 MCH 61 ST 2 Status Run supply Backup Comment CO 2 Switch to N 2 on Dec. 19 th, and back to Ar-CO 2 on Jan 9 th Nominal mixture (Ar-CO 2) during rest of EYETS ON Ar-CO 2 MTR OFF C 2 H 2 F 4 -i. C 4 H 10 -SF 6 PMD CPV HMPID envelope PHOS TOF OFF OFF ON ON OFF TRD ON Xe-CO 2 N 2 TPC ON Ar-CO 2 TPC envelope ON MCH 62 ST 3 -4 -5 Outlet chambers to atmp. Ar-CO 2 N 2 CH 4 Flushing by Argon N 2 manual supply C 2 H 2 F 4 -SF 6 C 2 H 2 F 4 CO 2 Bronkhorst supply Stop on Dec 5 th Backup Freeze the Xe in January and put it back around March Fill the TPC with Ne-CO 2 -N 2 in March EYETS planning meeting, 2 Dec 2016 - A. Tauro

Other activities • DSO test: 7 and 8 April NO access underground • DCS: Netgear ethernet redundancy (Andre) • TE-EPC: • Replace thyristors L 3 power converter (planning tbc) • Replace coils of the Thyristor Controlled Reactance (TCR) of LHC Static Var Compensator (w 3 -4). Acoustic noise test one night in w 11 (tbc) • HSE-RP-IL: annual source tests of all RAMSES on Jan 11 th • BE-ICS-AC: maintenance PX 24 access door. 26 and 27 Jan • BE-ICS-AS: • Maintenance gas and ODH detection in UX 25, SG 2, SD 2 and PX 24. Will stop flammable gases for ½ day. 22 and 23 February • Maintenance red phones. 20 Dec • Maintenance rack smoke detection. w 6 • EN-ACE-SU: • Measure the RB 24 beampipe flanges (at least F 0 -F 1). 2 to 5 days in w 2 or 3 • Survey PHOS • ALTEAD: maintenance CR 1 -4 drawbridges (January) • UX 25 floor painting: I-side w 4 and O-side w 5 (access via C/4 during I-side painting) EYETS planning meeting, 2 Dec 2016 - A. Tauro

Other activities • Fire Brigade Visit and Exercise. 13 and 17 Mar EYETS planning meeting, 2 Dec 2016 - A. Tauro

Access & services status Red = no access, Orange = access restrictions AUG LHC 1, access after 12: 00 Cavern closing Cavern opening Test auto transfer DSO Cooling plants maintenance w 10 -11 S 12 warm-up, access with self-breathing mask training Safety test Test secours CV maintenance w 9 -10 -11 (no cooling at all in w 11) EYETS planning meeting, 2 Dec 2016 - A. Tauro Acoustic noise measurement (date tbc) AUG

DAQ, DCS DAQ: • Shutdown of CR 1/ARC (excepted the DCS stations) on the last working week (Tue 20 -Wed 21 Dec 2016) • Logbook will move to CERN 1 and remain available all the time (with some small pauses around the two moves) • Restart of CR 1/ARC on Mon 9/Tue 10 Jan 2017 DCS: Short term • Monday 5 -December 09: 00: backup of all Win. CC projects • • Reference ‘snapshot’ of the systems at end of 2016 run Expected down time ~ 2 hrs • DCS available uninterrupted until end January • • Usual support during working hours ‘Best effort’ outside working hours and during CERN closure Further activities • Install new fileservers • End January (~1 day) • Upgrade Win. CC (v 3. 15), Windows/Linux patches, etc. • Date to be decided (not before end January), ~2 days • DCS shutdown for emergency stop test (16 March) EYETS planning meeting, 2 Dec 2016 - A. Tauro

Underground visits • From 5 Dec to 18 Dec (2 weeks) • After working hours (17: 30 onwards) • From 19 Dec to 24 Feb (10 weeks) • NO visits (lift replacement) • From 25 Feb to 2 April (5 weeks) • Private visits allowed • From 3 Apr to 13 April (2 weeks) • After working hours (17: 30 onwards) • From 14 Apr to 27 April (2 weeks) • Private visits allowed EYETS planning meeting, 2 Dec 2016 - A. Tauro

Backup EYETS planning meeting, 2 Dec 2016 - A. Tauro

Opening • Usual access restrictions during opening/closing Closing Opening/closing L 3 doors Maintenance UX 25 crane: 4 to 6 Jan EYETS planning meeting, 2 Dec 2016 - A. Tauro

PX 24 lift replacement • 10 weeks, from 19 Dec to 24 Feb • ALICE personnel via PM 25 (transparent) • From 12 Dec to 4 Jan: S 12 warm-up between 80 -300 K (risk of helium spill) access only for those with rescue mask training • S 12 cool-down (300 -80 K) w 8 -9 -10 EYETS planning meeting, 2 Dec 2016 - A. Tauro

O-side UX 25 floor painting • Resin • Access via C/4 during I-side painting I-side O-side I-side Cavern entrance EYETS planning meeting, 2 Dec 2016 - A. Tauro

Replacement L 3 converter thyristors (TE-EPC) 36 thyristors in operation, dating from LEP times Many of them have ‘bad contact’ L 3 magnet tripped several times over the last months Replacement of all thyristors foreseen in EYETS: • • • Finding compatible thyristors on the market (obsolete reference) Purchasing them (approximate budget: 50 k. CHF) Upgrading firing electronics for compatibility with new thyristors Bridge output voltage measurement Thryistor bridge 1 x thyristor pulse missing [3. 3 ms]

LHC Point 2 SVC : installation of new TCR coils (1) EYETS planning meeting, 2 Dec 2016 - A. Tauro • Purpose • Reduce the acoustic noise by exchanging the coils of the Thyristor Controlled Reactance (TCR) of LHC Static Var Compensator in Point 2 by new special low-noise coils • Requested by CERN Top Management 2275 2260 2265 LHC POINT 2 TCR Coils 23

LHC Point 2 SVC : installation of new TCR coils (2) EYETS planning meeting, 2 Dec 2016 - A. Tauro 24 Schedule proposed • • Switch-off: 5. 12. 2016 (date to be checked concerning Alice and TI 2) • W 49 -W 50 2016 : Dismantling of the coils • W 3 -W 4 2017 : Installation of the new coils • W 5 -W 6 2017 : Tests and commissioning (adaptation of the control system, first energization and powering tests) • W 7 2017: Acoustic noise measurements (one night) new date: W 10 (8 -9/3) • Switch-on: probably in W 7, and latest before 28 Febr. 2017 Safety • • Delimited worksite area without any coactivity (VIC already done) Consequences • • AC network quality deviation during this period (no more reactive power and harmonics compensation) • Impacted systems: No powering test possible for ALICE experiment and TI 2