Powering tests preparation Mirko Pojer and Matteo Solfaroli

Powering tests preparation Mirko Pojer and Matteo Solfaroli

Cryogenics § § We are presently almost everywhere at the nominal temperature Boil offs and cryo-tuning on-going 12/31/2021 Mirko Pojer – BE/OP 3

Pre-powering activities Early powering today!!! OK OK 12/31/2021 Mirko Pojer – BE/OP 4

EE insulation tests § § Courtesy of Bozhidar Panev Team of 4 people Following the maintenance on the EE switches done during YETS o Heavily stressed during the training campaign Tested at 2. 5 k. V for RB and 1 k. V for RQs, since the PC is disconnected o Cables disconnected on DFB side and PC negative polarity Disconn. Sectioning of the RB circuit for EE HV test. Similar configuration for RQs with only even side. Disconn. § § § Tests have been successfully completed in: o R 34, RR 57, UA 63, UA 67, RR 73, RR 77, UA 83, UA 87, RR 13, RR 17, UA 23 Tests have been completed, but without good results due to missing water circulation: o R 37, UA 43, UA 47, RR 53 Tests not yet done of failed: o UA 27 was repeated with good water flow, but failed with a resistance of 30 kohm; inspection on bus bars (disconnected from switches) has shown no contact to ground 12/31/2021 Mirko Pojer – BE/OP 5

El. QA § Following thermal excursion and heavy handling o o § Test of arc main circuits (1. 5 k. V on RB circuit, 900 V on RQs) – in the YETS baseline now Test of DSL circuits Test of two cold masses for thermal excursion (RQ 6. R 7 and RQ 6. L 8) Test of DFBLA/B (following the intervention of addition of 4 th cable on RQ 4. L/R 1) What has been done? o o o § Courtesy of Giorgio D’Angelo 2 teams of 2 persons for tests 2 teams of 3 persons for cable re-connection S 34 (including DSLC) S 45 S 12 S 78 S 23? S 81 is ongoing Good coordination with cryogenics o Temperature and liquid level in DFBs must be nominal 12/31/2021 Mirko Pojer – BE/OP 6

Cable re-connection (PC side) Courtesy of Christophe Coupat § Cables need to be disconnected from negative pole for the test of the EE system § To allow the El. QA tests on the cold masses with thermal excursion, the cables in the following positions have been also disconnected and will be reconnected after El. QA: o o § RR 77 – RCBCV 6. R 7 B 1/RCBCH 6. R 7 B 2 and RQ 6. R 7 B 1/B 2 UA 83 - RCBCV 6. L 8 B 1/RCBCH 6. L 8 B 2 By the end of the day, everything will be re-connected apart the cables in UA 27 (positive pole to be additionally disconnected on RQD) 12/31/2021 Mirko Pojer – BE/OP 7

PC unlocking § EPC has already de-condemn S 45 [UA 43/UJ 43, RR 53] and UA 43/UJ 43 o § § UJ 33 will be done this morning Some faults to be cleared: o o o RPHE. UA 43. RQF. A 34 TE-EPC Action RPHE. UA 47. RQD. A 45 TE-EPC Action RPHGA. RR 53. RQ 7. L 5 B 2 TE-EPC Action RPLB. UA 43. RCO. A 34 B 2 TE-EPC Action RPTE. UA 47. RB. A 45 TE-EPC Action o o o o RPHH. RR 53. RQ 4. L 5 B 2 Gérard’s Action [Défaut de Terre] RPLB. UA 47. RCO. A 45 B 1 Gérard’s Action [Défaut de Terre] RPLB. UA 47. RCO. A 45 B 2 Gérard’s Action [Défaut de Terre] RPMBB. UA 43. RU. L 4 Gérard’s Action [Défaut de Terre] RPMBB. UA 47. RSD 2. A 45 B 1 Gérard’s Action [Défaut de Terre] RPMBB. UA 47. RSF 2. A 45 B 1 Gérard’s Action [Défaut de Terre] RPMBB. UA 47. RU. R 4 Gérard’s Action [Défaut de Terre] QHPS can be charged in S 34 and 45 12/31/2021 Mirko Pojer – BE/OP 8

PC unlocking II § Planning for today: o o § S 12 in the late morning (Gerard&Co will be there from 9: 00) S 78 in the late afternoon (G&Co there from 14: 00) What’s next? o o S 81 on Wed 02/03 S 67 on Thu 03/03 S 23 on Thu 03/03 (depending on results of insulation on RQD) S 56 on Fri 04/03 12/31/2021 Mirko Pojer – BE/OP 9

Commissioning of water circuits § § Following the numerous interventions during the YETS, CV would like to test the water interlocks all over the ring Preliminary planning: o o o o S 45 – Tue 01/03 am S 34 – Tue 01/03 pm S 12 – Wed 02/03 am S 78 – Wed 02/03 pm S 81 – Thu 03/03 am S 23 – Fri 04/03 am S 56 – Mon 07/03 am S 67 – Mon 07/03 pm 12/31/2021 Mirko Pojer – BE/OP 10

UPS (powering redundancy) test All systems must be ready (live) for the day of the test in the different sectors Access will be needed for several teams to debug and fix issues If a test cannot be done, it will be moved to the end 12/31/2021 Mirko Pojer – BE/OP 11

QPS readiness § The installation of radiation tolerant detection systems for 600 A circuits has been completed wherever foreseen (point 1, 5 and 7) § Upgrade of the firmware for the DAMGS crate controller has been completed everywhere § The replacement of the Undulators detection system with new radhard boards has been as well completed, plus upgrade of the corresponding current sensors performed by EE team (replacement of LEMs by DCCTs) § Fresh news: o o Interlocks for updated 600 A protection systems in RR 53 successfully tested (84 interlocks) Interlocks for updated 600 A protection systems RU. L 4 and RU. R 4 successfully tested (12 interlocks) 12/31/2021 Mirko Pojer – BE/OP 12

Preparation of 2016 PT campaign § § § Procedures were all modified/reviewed by MP 3 and approved The (minor) modifications to the sequences have been completed The list of tests to be performed is now fixed o § § What about DFBLA/B? Do we need to test everything? Acc_testing has been populated The MTF campaign has been just created by EDMS support, with the archiving of the old one 12/31/2021 Mirko Pojer – BE/OP 13

Preparation of 2016 PT camp. II § Resources and shifts are defined o o o § How it translates for the coming days: o o § OP – 3 x 8 h MP 3 – 3 x 8 h 2 p/shift during day time, 1 p/shift at night EPC – 2 x 8 h (7: 00 -23: 00) + 1 shift on call PIC – 1 extended shift Acc_Testing experts – coverage in CCC during the day and piquet for the rest Today early testing for debugging from ~17 till ~19 in S 45; will do at least a test per circuit (priority 600 A!!!) – no shifts, but would be helpful to have some experts to call Friday, start of tests at 17 – start of the shifts; no night! Sat 05/Sun 06 – no night! From Mon 06/03, 3 shift a day Tunnel accesses (exclusively related to powering) will be during the normal working hours 12/31/2021 Mirko Pojer – BE/OP 14