I noticed an alarming spike on the Vistar luminosity screen.LHCb seeing 13000 ub.s^-1 instantaneous luminosity !
(Target luminosity 400 ub.s^-1)
After they dumped fill 2875 (15+hr, 172/pb) they switched polarity on LHCb and loaded a light fill for IP optimization.
(I have a luminosity page screen grab jpg to insert here, but no web page to publish it on.)
The only chronologically relevent comment in ELOG:
25-Jul 12:35 LHC Comments optimising IP8 after polarity change
There was an access interval shortly thereafter, austensibly for previously requested muon detector repair. (muon trips and voltage monitor error seen earlier)
Are these detectors so indestructible that a 3250% over-illumination is inconsequencial or were there some consequences that were not reported in the public logbook?