Summary of Week 10: Hardware Commissioning

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2. Summary of week 10 Hardware Commissioning: M. Pojer, R. Schmidt and M. Solfaroli Aims of the week • Finish HWC • Prepare machine for first beam Machine checkout: R. Giachino, M.Albert and J. Wenninger LHC 8:30 meeting

3. LHC check-out Main targets of the week: • Finish HWC, • Close the beam interlock loop, • Test the beam dump, • Test the injection kickers, • Run the LHC through a full machine cycle, • Check the control system. LHC 8:30 meeting

4. Progress : HWC & checkout • From Monday to Friday HWC and machine checkout activities had to be performed in parallel. • Priorities were defined every day for HWC and for checkout activities, the focus shifting from HWC to checkout along the week. • Collaboration HWC-machine checkout, was very smooth due to a better planning of the activities. LHC 8:30 meeting

5. Status of powering tests In total, 8185 tests steps (including preparations of powering tests) have been done Progressive availability of cryogenic conditions

6. Powering status • Heat runs: • All sectors were tested • Pre-cycles work well. • Several full machine cycles were performed • Without hardware powering faults. • RQT13.L8B1 increased IPNO from 400 to 450(B* .6m) LHC 8:30 meeting

7. Machine cycle • HWC was completed Wednesday afternoon when the machine was ‘handed’ over to beam operation. • The same evening, the machine was pushed through the nominal proton cycle: • Pre-cycling of the magnets, • Injection, • Ramp, • Squeeze. control issues were identified – have been fixed or will be fixed in the coming days. LHC 8:30 meeting

8. LHC progress : beam interlock and kickers • To close the beam interlock loop requires a number of conditions, the most difficult ones to achieve were: • LHC closed – no access (also experiments), • No powering failures, • Vacuum valves open, • BLM system operational. >>tough constraints given parallel HWC activities. • The BIS loop was closed the first time Friday evening. • Saturday late night both dump and injection kicker systems were pulsing. LHC 8:30 meeting

9. LHC progress: LBDS & MKI tests • BETS fully tested at 450GeV and 4GeV. • Injection inhibitions between LBDS and MKI are OK. • TSU clients tested: • BIS • BETS • Internal failure (frev switch off) • LBDS trigger • Circulate & dump • Inject & dump -> functionality OK issue with XPOC (see below) • TSU synchronisation. • TSU IPOC thresholds have been adjusted. • MKI synchronisation • checks with beam show a shift of the kick by +160ns w.r.t. beam (to be decided how to adjust it) • Inject & dump • status is badly returned by one of the 2 CPLDs on the TSU (to be decided)

10. Controls • Along the week the OP teams with support from numerous equipment groups tested applications, front-ends, LSA core etc.. LHC 8:30 meeting

11. The Vacuum system was operational on Friday evening after a big effort in point 2&8. • RF was ready to ramp for the week end. • BI was extensively tested without beam. • Collimators setting and calibration is finished. • The cryogenic system, has been stable all along the HWC. • EN/EL, EN/CV at nominal configuration. LHC 8:30 meeting

12. Injectors and transfer lines (1) • PSB started up with beam 20th February. • LHC-indiv Lhc50 LHC-probe LHC25 • PS started up with beam 23th February. • LHC-probe, LHC-indiv. • LHC50 12b setting up • SPS started up with beam 25th February. • SPS aligned, probe bunch ready to be extracted to the LHC. • LHC-Indiv, LHC-probe, LHC50 multibatch • Scrubbing LHC 25 72 Bunches LHC 8:30 meeting

13. Injectors and transfer lines (2) • Thursday probe bunches were extracted into the TT60 & TT40. • Saturday afternoon beams were sent down the 3 km long TI2 and TI8 transfer lines to the downstream (LHC end) dumps. • Saturday night stability checks were performed. TI8 TI2 LHC 8:30 meeting

14. Open issues • TI 2 Transfer line PC RBIV26407 tripped (to be checked) • RQT13.L8B1 increased from IPNO from 400 to 450 (b*.6m) Done ok • RCBV27R4B1 communication lost • RCBXH1.L1 tripped (circuit super-locked) • RQTL11.R1B2 problem on TT893 temperature sensor • RD34.LR3 ramp-down settings are “out of limits” • RQX.R2QPS controller communication problem; oscillating • RQTD/F circuits unable to load ramp/squeeze function (Fidel on Monday) • RQF/RQD require higher commissioning current for high beta (50 A) • Inject & dump status is badly returned by one of the 2 CPLDs on the TSU • MKI synchronisation checks with beam show a shift of the kick by +160ns w.r.t. beam (to be decided how to adjust it RF)

15. Access • Radiation veto after machine closed !!! • Access system • PAD problem PM25 • Possible intervention Monday morning • Alfa • Monday morning Point 1 • BT • Access point 6 for TSU inject and Dump • R2E • Monday morning TX76 1Hr • X ray 2 & 8 • Monday afternoon point 8 • Tuesday morning point 2

16. Planning

17. Summary • Situation of the machine: • The LHC magnet and powering system is fully commissioned and the machine is in a very good state – as demonstrated by the cycling of the machine. • RF need 2-4 hrs for fine tuning before beam. • LBDS & MKI minors adjustments before declaring operational. • Essential beam instrumentation and feedbacks tested. – fine tuning with beam. • Control system operational – smaller issues will be fixed in the coming days. • First beam hopefully Tuesday afternoon! LHC 8:30 meeting

18. Saturday • 09:00 Start LBDS tests • 09:13 Starting ramp of RF and ADT. • stay at flat top with the RF to stress the cavities. • 15:30 Beams down TI8 & TI2 • Application Collimator Scan is tested and worked fine.

19. Last night • 22:30 Alfa interlock. • Tests couldn’t be performed • Problems related to the movement of their XRPs there’s presumably  a problem with their logic control; experts will check it this morning • 22:50 Etienne finished the tests on MKI. • Now left to do the circulate and dump for both Beams. • Circulate & DUMP B1&B2 (~50 shots each) • Short access for ATLAS to verify the cooling system; They will need to intervene this morning to fix a problem they have identified (estimate: ~4h, to be scheduled) • Ramp of PCs (except RQTD/F) • Squeeze • without RQT13.L8B1 (out of limits error) and RQTD/F circuits

20. Last night • RQX.R1, RTQX1.R1 and RTQX2.R1 tripped while executing RAMPDOWN[START] function • but no fault present (only PC_PERMIT went away) • RD34.LR3 gives a "out of limit" when loading the ramp-down function • ALICE requested some time for a cosmic .. • Executed ramp of PCs (without RQTD/F & RCS/O/D) & RF

21. LBDS MKI tests • BETS fully tested at 450GeV and 4GeV. Ramp was OK. • Error check during the ramp still to be done on Monday by Nicolas V. • Injection inhibitions between LBDS and MKI are OK. • Response times are within specification • TSU clients tested: • BIS -> OK • BETS -> OK • Internal failure (frev switch off) -> OK • LBDS trigger --> OK • Circulate & dump -> OK • Inject & dump -> functionnality OK issue with XPOC (see below) • TSU synchronisation -> OK • TSU IPOC thresholds have been adjusted All OK now • MKI synchronisation checks with beam show a shift of the kick by +160ns w.r.t. beam (to be decided how to adjust it) • Inject & dump status is badly returned by one of the 2 CPLDs on the TSU (to be decided)

22. LBDS tests • BIS loop closed and arm beam dump- done • Check injection inhibition from LBDS-      done •  TSU tests for about 4 hours to test clients (BIS, BETS,…)-    done   •  Circulate and dump for TSU testing for about one hour. Done • Mask modules in XPOC which are not yet receiving data.-    •  Check IQC-   ok • Synchronization of MKI with AGK without beam, loops closed.-Checked  •  Beam down TL TI2 and TI8. Rough steering.-     done •  TCDI machine protection tests done • TCDI set-up tests.- chiara       • Direct interlock of LASS to LBDS- .>>>done •  LBDS energy tracking interlocks by trimming– only needs BETS armed, not BIS.- done   •  Check BIS timestamps and redundancy of signals to LBDS (with CM, if time available)-          Other tests from MP Web page. 

23. Injection status • Managed to pulse both kickers. • Need to check why only the TCDIs beam 1 are interlocking in parking and not beam . • Problem with timing system: • hidden tables loaded in MTG. Cannot see them and cannot unload them, but they are played (injection, injection_BI). • Inject & dump does not work currently. • Circulate & dump is fine • (uses the hidden tables automatically). • Running circulate & dump in a loop not possible • masking on XPOC not working anymore. (Roman). >>Done

24. MKI MPS tests • MKI MPS tests • Toggling MKI status and checking input state on injection BIC, both beams- Verifying and adapting soft-start settings (normal and extended), both beams        - adjusted operational limits around nominal value (entries 7 and 8)        - changed voltage step size for extended settings (entry 14) • Probed voltage limit for which MKIs not pulsing anymore (1 kV above nominal value, 1 kV below conditioning value), only for P8 done • Loading kicker soft-start settings from TRIM and FESA, not possible to change without MCS role, possible with MCS role • Changing critical settings in MKI application only possible with MCS role

25. MKI MPS tests • Tried to do the energy tracking tests:changing LHC energy: SIS injection energy consistency check stopped us from trimming the RBs above the BETS limit of 0.96 GeV, need a workaround for the commissioning to still perform this test in the next days        - changing MKI voltage: within operational limits the kickers are pulsing, need to check with limits further open (MCS role needed) MKI tests not finished. • MPS interlock tests for collimators TCDI, TDI, TCLI and TCDD in P2 done

26. Injection status • IQC all data collection is fine, but the soft-start buffer is pushed to PM too early before it is updated after the pulse. • -> The IQC does not find it having pulsed. Done . • OASIS for MKI signals still needs follow up next week. Currently not fully operational. Done

27. Summary TSU test (both beams) • Check TSU clients:- BIS triggering --> OK- BETS triggering --> OK- Internal failure triggering --> OK- LBDS slow control triggering --> OK- Inject and dump triggering --> Works fine but bad status acquisition from CPLD2 (XPOC error)- Circulate and dump --> OK • Issues to be followed:- Inject and dump detection (TSU card CPLD2)- Spurious bad XPOC analysis on TSU (missing dump request detection, XPOC event builder synchronisation)ALL dumps properly synchronised... • Thresholds adjusted for TSU-IPOC analysis:- re-trigger detection decreased to 199us- DBRF length detection adjusted to 1us- BRF length detection adjusted to 0.9us- BAGK length reduced to 10.9us

28. ABT Software • ABT and BI had to adapt many FESA devices in a manner to have their PM buffers properly saved into PM data store for IQC and XPOC analysis. • Impacted systems are:-  • MKI/BETS-  MKI/IPOC-  LBDS/TSU- BTVDD • Now everything is fine for both IQC and XPOC. • We only miss Vacuum data for XPOC, so we had to mask the VAC module temporarily. • It seems that work is ongoing on TE/VSC side to find a solution to the problem.

29. Safe Machine Parameters System