Saturday Wire scans at end of fill 1253 B1H : 4.2 B1V : 4.3 B2H : 5 B2V : 7.2 Beams dumped 12.40 (after ~14h of collisions) Some issues during refill (chromaticity pushed low) Injection multi bunch not 100% OK (many IQC latches) Ramp ~ 17.00 Tune and orbit feedbacks switched off in ramp Arrived at 3.5 TeV and corrected, but lost when restart feedbacks Next ramp ~ 20.00 Lost at start of ramp due to BPM excursion at point 6 Orbit looked OK 4/26/2019 LHC status

Sunday Next ramp ~ 01.00 OK Stable beams ~ 04.00 Beams dumped ~05.00 Difficulties to get orbit under control at 3.5 TeV – Jorg Stable beams ~ 04.00 Low lifetime beam 2 Lower lumis Beams dumped ~05.00 RQD tripped Cooling in S56 Access needed Problem found ~08.00 2 hours to fix 4/26/2019 LHC status

Interventions needed Magnetic probes in the machine for the studies related to the hump - access would be required in point 5 (GA, LW) 2 hours in the shadow CV need to replace a motorisation of the water valve of the sector. Time estimate ~3h 4/26/2019 LHC status