| TE-VSC |
TE-VSC module task force to report back to LMC, including any possible intensity limitations, in due time. |
✔ |
LHC Machine Committee (LMC #464) |
LHC Machine Committee (LMC #477) |
147
|
| BE-ABP |
Circulate new Reverse Polarity optics proposal to the experiments via LPC to evaluate their impact on the Forward Physics experiments. |
✔ |
LHC Machine Committee (LMC #464) |
LHC Machine Committee (LMC #465) |
148
|
| MPP |
Confirm the procedure for the ramp up and minimum gap for the LHCb VeLo closing. |
✔ |
LHC Machine Committee (LMC #463) |
LHC Machine Committee (LMC #465) |
144
|
| SY-RF, EN-ACE, RF Burst Disc Task Force |
Investigate the preventive exchange of 2 burst discs during TS1. |
✔ |
LHC Machine Committee (LMC #463) |
LHC Machine Committee (LMC #464) |
145
|
| RF Burst Disc Task Force |
Report back on the feasibility of installing a new control valve with full section opening to act in a similar way to the Warm Recovery Line. |
✔ |
LHC Machine Committee (LMC #463) |
LHC Machine Committee (LMC #474) |
146
|
| Collimation team |
Understand the observed impact of the TCSPM.E5R7.B1 retraction on the B1H lifetime |
✔ |
LHC Machine Committee (LMC #462) |
LHC Machine Committee (LMC #463) |
142
|
| Run 3 Coordinators |
Distribute the actions collected from the YETS 2022-23 return of experience to the designated responsibles for follow-up. |
✔ |
LHC Machine Committee (LMC #462) |
LHC Machine Committee (LMC #483) |
143
|
| SY-EPC |
Implement the proposed changes to the procedures to avoid non-conformities similar to that of RTQX2.L5 reoccurring. |
✔ |
LHC Machine Committee (LMC #461) |
LHC Machine Committee (LMC #467) |
140
|
| MP3 |
Implement an automatic measurement of the circuit resistance for comparisons to their reference values during HWC. |
✔ |
LHC Machine Committee (LMC #461) |
LHC Machine Committee (LMC #467) |
141
|
| MPP, LBOC |
Confirm the possibility to use the Beam 2 BBLR wires in operation, and determine the additional commissioning time required. |
✔ |
LHC Machine Committee (LMC #460) |
LHC Machine Committee (LMC #462) |
130
|
| RF Burst Disc Task Force |
Report back on the advancement on the investigations of the Point 4 event on April 1st, 2023 and the progress in the understanding the observed time delay between the release valves trigger and the premature rupture of the discs. |
✔ |
LHC Machine Committee (LMC #460) |
LHC Machine Committee (LMC #463) |
136
|
| RF Burst Disc Task Force |
Formalize the procedures for a prompt intervention of the specialists in the different He venting scenarios of the RF cavities. |
✔ |
LHC Machine Committee (LMC #460) |
|
137
|
| TE-CRG, Energy Management Panel |
Establish the impact of excluding Point 4 from the economic mode configuration of the LHC cryogenic system, and report back with the recommendation. |
✔ |
LHC Machine Committee (LMC #460) |
|
138
|
| LPC, MPP |
Report back on the results of the VeLo tomography (400 bunches and 6.8 TeV fill) |
✔ |
LHC Machine Committee (LMC #460) |
LHC Machine Committee (LMC #463) |
139
|
| SY-STI |
Notify everyone as soon as possible on the possibility to re-install the TCPCH.A4L7.B1, to be able to plan and start the bakeout of the vacuum sector. |
✔ |
LHC Machine Committee (LMC #459) |
LHC Machine Committee (LMC #460) |
131
|
| LBOC, CMS Collaboration, Triplet Task Force |
Report back after the beam-based measurements for a decision on the need for additional correction. |
✔ |
LHC Machine Committee (LMC #459) |
LHC Machine Committee (LMC #464) |
132
|
| Triplet Task Force |
Report on the impact of not performing the polarity inversion of the IR1 crossing angle in 2023. |
✔ |
LHC Machine Committee (LMC #459) |
LHC Machine Committee (LMC #464) |
133
|
| LPC |
Quantify the effect of the crossing angle polarity change in IR1 on the FASER detector acceptance and on its overall performance. |
✔ |
LHC Machine Committee (LMC #459) |
LHC Machine Committee (LMC #460) |
134
|
| SY-BI, BE-OP, EN-HE |
Agree on the notification line for removing the movable BLMs in the TCLD.A11R2.B1 and TCLD.A11L2.B2 regions before large equipment transport. |
✔ |
LHC Machine Committee (LMC #459) |
LHC Machine Committee (LMC #461) |
135
|
| LBOC |
Follow-up the TDIS temperature increase and its correlation with beam presence. |
✔ |
LHC Machine Committee (LMC #458) |
LHC Machine Committee (LMC #466) |
127
|
| SY-STI |
Report, in due time, the outcome of the quantitative assessments on the operational limits on the frequency of the beam dumps. |
✔ |
LHC Machine Committee (LMC #458) |
LHC Machine Committee (LMC #470) |
128
|
| SY-EPC |
Report on the outcome of the investigation on the non-conformity in the Point 5 RTQX2 circuit. |
✔ |
LHC Machine Committee (LMC #458) |
LHC Machine Committee (LMC #461) |
129
|
| SY-STI |
Prepare a spare collimator for the TCTV.4R1.B2. |
✔ |
LHC Machine Committee (LMC #457) |
LHC Machine Committee (LMC #458) |
126
|
| SY-BI |
Prepare and circulate an ECR on the repair proposal of the TCT wire collimators. |
✔ |
LHC Machine Committee (LMC #456) |
LHC Machine Committee (LMC #457) |
122
|
| LBOC |
Collect, analyze and discuss the TCLD.11.R2.B1 related beam observations. |
✔ |
LHC Machine Committee (LMC #456) |
LHC Machine Committee (LMC #486) |
123
|
| LHCb collaboration, TE-VSC |
Report in due time on the Phase II vacuum recovery of the LHCb VeLo. |
✔ |
LHC Machine Committee (LMC #456) |
LHC Machine Committee (LMC #457) |
124
|
| TREX |
Coordinate the impact studies of the different specialists to verify that Option 2 (running in 2023 with damaged RF box) is a viable scenario from the machine perspective. |
✔ |
LHC Machine Committee (LMC #456) |
LHC Machine Committee (LMC #457) |
125
|
| LHC CSAP |
Present the proposal for a modified access to UX451 and RUX45 to the ATS Safety Meeting for further action. |
✔ |
LHC Machine Committee (LMC #455) |
|
121
|
| Triplet Task Force |
Investigate the impact of the orbit bump on the triplet and CMS Inner Tracker lifetimes. |
✔ |
LHC Machine Committee (LMC #454) |
LHC Machine Committee (LMC #464) |
120
|
| SY-BI |
Propose a strategy for repairing and consolidating the BBLR demonstrators. |
✔ |
LHC Machine Committee (LMC #453) |
LHC Machine Committee (LMC #456) |
117
|
| TE-VSC, R2E, LBOC |
Report on observed vacuum activities in IR4 (5R4.B2) and its correlation with measured dose. |
✔ |
LHC Machine Committee (LMC #453) |
LHC Machine Committee (LMC #486) |
118
|
| LPC |
Investigate the recent dumps due to the ATLAS BCM (fast losses for high intensity beam). |
✔ |
LHC Machine Committee (LMC #453) |
LHC Machine Committee (LMC #455) |
119
|
| LBOC |
Report on the plans for implementing the CMS IP shift at the next LMC. |
✔ |
LHC Machine Committee (LMC #452) |
LHC Machine Committee (LMC #453) |
115
|
| TE-VSC |
Report back on the vacuum issues in 5R4. |
✔ |
LHC Machine Committee (LMC #452) |
LHC Machine Committee (LMC #453) |
116
|
| BE-OP |
Clarify the scenarios for which the ALICE and LHCb magnets should be turned off, or kept on, in case of electrical load shedding or longer stops of the LHC. |
✔ |
LHC Machine Committee (LMC #451) |
LHC Machine Committee (LMC #452) |
111
|
| rMPP |
Verify the reasons for the limit on bunch intensity at 1.4e11 ppb set at last LHC Performance Meeting for 2022 operation, and indicate whether the bunch intensity increase to 1.6e11 ppb entails any risk. |
✔ |
LHC Machine Committee (LMC #451) |
LHC Machine Committee (LMC #452) |
112
|
| BE-GM |
Report back after the inspection of the Q2L5 and autopsy of the motorized adapter. |
✔ |
LHC Machine Committee (LMC #451) |
LHC Machine Committee (LMC #457) |
113
|
| LPC, LHCb collaboration |
Confirm with the LHCb team if the option of reduced scan range is viable, and report on the final result of the tolerances analysis and chosen option for the vdM optics. |
✔ |
LHC Machine Committee (LMC #451) |
LHC Machine Committee (LMC #452) |
114
|
| Collimation team |
Cross-check the minimal aperture requirements for the LHCb VeLo at 6.8 TeV. |
✔ |
LHC Machine Committee (LMC #450) |
LHC Machine Committee (LMC #451) |
110
|
| rMPP |
Report back on the findings of the loss maps at high chromaticity and high octupole settings. |
✔ |
LHC Machine Committee (LMC #449) |
LHC Machine Committee (LMC #450) |
107
|