| EN-ACE |
Follow-up on the YETS25-26 open points from the return of experience. |
✖ |
LHC Machine Committee (LMC #526) |
|
236
|
| R2E, MCWG |
Study the radiation levels at the PICv2 installation in UA83-87 and identify whether mitigation measures are required. |
✖ |
LHC Machine Committee (LMC #526) |
|
237
|
| TF for mitigation of collimator end-of-life in the HL era |
Produce a final document to include: comprehensive overview of available and missing spares for critical collimators, including procurement lead times, overview of components that can be recovered [...] and a comparison of alternatives scenarios [...] |
✖ |
LHC Machine Committee (LMC #526) |
|
233
|
| TF for mitigation of collimator end-of-life in the HL era |
Produce a summary table combining all the relevant data shown in the presentation. |
✖ |
LHC Machine Committee (LMC #526) |
|
232
|
| SY-STI, BE-CEM |
Study possible alternative solutions for collimator LVDT calibrations and mechanical maintenance that do not include fully opening the collimators. |
✖ |
LHC Machine Committee (LMC #526) |
|
234
|
| BE-ABP, SY-STI |
Study the impact of losing more than one non-critical collimator on machine performance. |
✖ |
LHC Machine Committee (LMC #526) |
|
235
|
| LSWG |
Prepare a full schedule for the high intensity test period, including MDs, for approval at the LMC. |
✖ |
LHC Machine Committee (LMC #522) |
|
231
|
| MPP |
Analyse the results of the blindable BLM test and propose a strategy for deployment if deemed necessary. |
✖ |
LHC Machine Committee (LMC #522) |
|
229
|
| LBOC |
Understand the alignment issues related to the TCDQ and TDIS. |
✖ |
LHC Machine Committee (LMC #522) |
|
230
|
| SO-SCE |
Prepare an LS3 inspection/intervention plan to minimize water infiltrations risks in the LHC tunnel. In the shorter term, once conditions allow, re-establish the full operability of the Sector 34 mono-rail in time for the TIM RP survey at the end of Run3. |
✔ |
LHC Machine Committee (LMC #521) |
LHC Machine Committee (LMC #528) |
225
|
| SM18 coordination |
Investigate how RF cryomodule M1B2 testing and refurbishment during LS3 can be integrated into SM18 activities. |
✔ |
LHC Machine Committee (LMC #521) |
LHC Machine Committee (LMC #528) |
227
|
| TE-MSC |
Investigate the feasibility of the RQT12.R8B2 exchange or repair during LS3. |
✔ |
LHC Machine Committee (LMC #521) |
LHC Machine Committee (LMC #522) |
226
|
| ATSMB |
Decide on how to coordinate and resource R2E related activities that need to take place in Point 8 during LS3 regardless of the LHCb upgrade. |
✔ |
LHC Machine Committee (LMC #521) |
LHC Machine Committee (LMC #528) |
228
|
| EN-ACE |
Report, in due time, the return of experience on the short YETS2025-26. |
✔ |
LHC Machine Committee (LMC #520) |
LHC Machine Committee (LMC #526) |
224
|
| BGSWG |
Follow up on the ALICE and LHCb backgrounds with ions, and report back in due time. |
✖ |
LHC Machine Committee (LMC #520) |
|
223
|
| BGSWG |
Follow up on the ALICE background degradation with - /- polarity, and report back in due time. |
✔ |
LHC Machine Committee (LMC #519) |
LHC Machine Committee (LMC #520) |
222
|
| SY-STI, BE-OP, BE-ABP |
Limit the collimator movement to a minimum wherever possible. |
✔ |
LHC Machine Committee (LMC #514) |
LHC Machine Committee (LMC #526) |
220
|
| LSWG |
Compile a prioritized list of MDs that must take place before the end of Run for both protons and ions. |
✔ |
LHC Machine Committee (LMC #514) |
LHC Machine Committee (LMC #525) |
221
|
| TE-MPE, MPP, BE-OP |
Investigate the possibility to include some of the RQS circuits in the PIC during the next YETS, after having checked the relevant failure cases. |
✔ |
LHC Machine Committee (LMC #513) |
LHC Machine Committee (LMC #526) |
217
|
| BE-OP, BE-ABP |
Investigate the possibility of installing a solenoid in 6L2 to limit the ecloud effect if required for the MD program. |
✔ |
LHC Machine Committee (LMC #513) |
LHC Machine Committee (LMC #521) |
218
|
| ATS groups |
Take note of the deadlines for approval of the ECRs (February 2026) and for integration (December 2025) for LS3 activities. |
✔ |
LHC Machine Committee (LMC #513) |
LHC Machine Committee (LMC #514) |
219
|
| BE-OP |
Rework the 2026 draft schedule taking into account LMC input. |
✔ |
LHC Machine Committee (LMC #512) |
LHC Machine Committee (LMC #518) |
216
|
| SY-RF, BE-OP |
Investigate strategies to consolidate the ADT setting management to avoid issues when transitioning to different operational modes. |
✖ |
LHC Machine Committee (LMC #511) |
|
214
|
| EN-HE, TIOC |
Understand the reason for the missed PX15 elevator alarm and put in place a fix to ensure that this does not reoccur. |
✔ |
LHC Machine Committee (LMC #511) |
LHC Machine Committee (LMC #528) |
215
|
| SY-STI |
Report back on the general spares strategy for all collimators in the HL era. |
✔ |
LHC Machine Committee (LMC #510) |
LHC Machine Committee (LMC #526) |
213
|
| SY-ABT, BE-OP |
Investigate possible stroke reductions or fixed garage position also for the TCLIB in Point 2. |
✔ |
LHC Machine Committee (LMC #510) |
LHC Machine Committee (LMC #513) |
212
|
| SY-STI |
Report back on the strategy for mitigating the issue with the TCLIB.6L8 and any eventual intervention in the next YETS. |
✔ |
LHC Machine Committee (LMC #510) |
LHC Machine Committee (LMC #513) |
211
|
| SY-STI |
Prepare the TCLIB spare in readiness for an eventual exchange. |
✔ |
LHC Machine Committee (LMC #509) |
LHC Machine Committee (LMC #513) |
207
|
| ATS groups |
Take note of the list of upcoming roadworks during the 2025-2029 period, and provide feedback if needed. |
✔ |
LHC Machine Committee (LMC #509) |
LHC Machine Committee (LMC #510) |
210
|
| ATS groups |
Verify the new version of the LS3 master schedule, and give feedback to EN-ACE-OSS if needed. |
✔ |
LHC Machine Committee (LMC #509) |
LHC Machine Committee (LMC #510) |
209
|
| MPP, SY-STI, SY-ABT |
Given the present status of the TCLIB.A6L8 (jaws blocked in garage position), report back on the risk analysis and recommendations for the high intensity run. |
✔ |
LHC Machine Committee (LMC #509) |
LHC Machine Committee (LMC #510) |
208
|
| BE-ABP |
Investigate and report back on the increased background observed by SND and FASER. |
✔ |
LHC Machine Committee (LMC #508) |
LHC Machine Committee (LMC #528) |
206
|
| EN-ACE |
Circulate the EYETS post-mortem action list to the scientific secretaries of LMC, LS3C and IEFC to dispatch the EYETS post-mortem actions, accordingly to their subject, to the different Committees. |
✔ |
LHC Machine Committee (LMC #507) |
LHC Machine Committee (LMC #510) |
205
|
| BE-ICS |
Report back on the PLC failure rates after the upgrades of the TE-CRG systems are completed. |
✖ |
LHC Machine Committee (LMC #506) |
|
204
|
| BE-OP |
Consistent with the LMC 484 decision, implement a TDIS parking position of 40 mm instead of its nominal parking position of 55 mm during p-p operation. For Pb-Pb operation and p-p VdM runs, the TDIS parking position will need to be reverted to its nominal |
✔ |
LHC Machine Committee (LMC #504) |
LHC Machine Committee (LMC #505) |
203
|
| BE-OP |
Investigate if the two weeks planned for the 2026 HWC campaign can be further reduced. |
✖ |
LHC Machine Committee (LMC #503) |
|
202
|
| SY-STI |
Investigate the impact of both H and V crossing plane options on the TCL mitigation strategy for LHCb. Report back to LMC in view of possible TCL procurement by the end of 2025. |
✔ |
LHC Machine Committee (LMC #502) |
LHC Machine Committee (LMC #528) |
201
|
| SY-RF |
Report back on M1B2 cryomodule performance with beam. |
✔ |
LHC Machine Committee (LMC #501) |
LHC Machine Committee (LMC #521) |
199
|
| ATS groups |
Remind all personnel about the strict prohibition of crossing safety barriers and fences, and reiterate the necessity of adhering to all safety protocols. |
✔ |
LHC Machine Committee (LMC #501) |
LHC Machine Committee (LMC #502) |
200
|
| LBOC |
Following the recommendation of the Edge-Welded Bellows Task Force, ensure that the stroke of all LHC equipment is reduced to the minimum necessary. |
✔ |
LHC Machine Committee (LMC #500) |
LHC Machine Committee (LMC #526) |
198
|