1. Saturday
Wire scans at end of fill 1253 B1H : 4.2 B1V : 4.3 B2H : 5 B2V : 7.2
Beams dumped (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

2. 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

3. 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