| SY-STI, BE-OP, BE-ABP |
Limit the collimator movement to a minimum wherever possible. |
✖ |
LHC Machine Committee (LMC #514) |
|
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) |
|
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) |
|
217
|
| 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, 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) |
|
218
|
| BE-OP |
Rework the 2026 draft schedule taking into account LMC input. |
✖ |
LHC Machine Committee (LMC #512) |
|
216
|
| 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) |
|
215
|
| 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
|
| 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-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 general spares strategy for all collimators in the HL era. |
✖ |
LHC Machine Committee (LMC #510) |
|
213
|
| 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
|
| 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
|
| 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
|
| BE-ABP |
Investigate and report back on the increased background observed by SND and FASER. |
✖ |
LHC Machine Committee (LMC #508) |
|
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) |
|
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) |
|
201
|
| 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
|
| SY-RF |
Report back on M1B2 cryomodule performance with beam. |
✖ |
LHC Machine Committee (LMC #501) |
|
199
|
| 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) |
|
198
|
| TE-MPE |
Provide BE-OP with a complete picture of the various versions of QPS cards installed for the 2025 run, including their location, and follow agreed procedures for future modifications. |
✖ |
LHC Machine Committee (LMC #500) |
|
197
|
| LBOC |
Prepare options and procedures for mitigating a failure of the first D1 module and report back to the LMC in due time. |
✔ |
LHC Machine Committee (LMC #499) |
LHC Machine Committee (LMC #501) |
196
|
| TE-MPE |
Document the recent QPS system changes in a dedicated ARR. |
✔ |
LHC Machine Committee (LMC #499) |
LHC Machine Committee (LMC #500) |
194
|
| BE-OP, TE-MPE, MP3 |
Validate the recent QPS system changes during the 2025 HWC campaign. |
✔ |
LHC Machine Committee (LMC #499) |
LHC Machine Committee (LMC #503) |
195
|
| TE-MPE |
Report back on the recent QPS events in due time. |
✔ |
LHC Machine Committee (LMC #498) |
LHC Machine Committee (LMC #499) |
192
|
| ATS groups |
Check which sectors will be baked out during the EYETS 2024-25 and ensure that there is no impact on their equipment in these regions. |
✔ |
LHC Machine Committee (LMC #498) |
LHC Machine Committee (LMC #499) |
193
|
| SY-EPC |
Report back on the anomalies suspected on the circuit for RQ5.LR3. |
✔ |
LHC Machine Committee (LMC #497) |
LHC Machine Committee (LMC #498) |
190
|
| BE-ABP |
Report back in due time about the flat optics segment of the LHC 2025-26 configuration. |
✔ |
LHC Machine Committee (LMC #497) |
LHC Machine Committee (LMC #499) |
191
|
| BE-OP |
Report back the final 2025 schedule and the updated 2026 draft. |
✔ |
LHC Machine Committee (LMC #497) |
LHC Machine Committee (LMC #499) |
189
|
| LPC |
Report in due time on the potential of an intermediate solution between Scenario B and C, taking into account an 11 weeks YETS and the effect on the cooldown time for the p-Pb run. |
✔ |
LHC Machine Committee (LMC #496) |
LHC Machine Committee (LMC #499) |
188
|
| SY-EPC, TE-CRG |
Report back on the investigation about the correlation between the SVC re-activation and the cryo problem in Point 8. |
✔ |
LHC Machine Committee (LMC #494) |
LHC Machine Committee (LMC #503) |
187
|
| ATS groups |
Provide input on Radiation Resistant Cable requirements to EN-EL by 14 October. |
✔ |
LHC Machine Committee (LMC #493) |
LHC Machine Committee (LMC #494) |
186
|
| SY-ABT |
Report back to the LMC on the consolidation proposal for the AC dipole and the possibilities for its upgrade for the HL-era. |
✖ |
LHC Machine Committee (LMC #492) |
|
184
|
| BE-OP |
Prepare a plan for an optimal use of the machine time if the repair of the compressor in Point 6 has to be performed sooner than currently scheduled. |
✔ |
LHC Machine Committee (LMC #492) |
LHC Machine Committee (LMC #493) |
185
|
| EN-EL |
Clarify the AUG specification procedure and stakeholder involvement for areas involving experiments. |
✖ |
LHC Machine Committee (LMC #491) |
|
183
|
| LBOC |
Track down the root causes of the observed lifetime improvement during the cycle before Stable Beams. |
✔ |
LHC Machine Committee (LMC #490) |
LHC Machine Committee (LMC #501) |
182
|