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Yes, the machine is purring along on song now. Clearly there's an optimal run time for average delivered lumi per time period, which depends on the switchover duration and on the decay exponent coefficient. I suspect that, with 2 hour switchovers, 13+ hours is somewhat too long.
Looks like the current run (#6675) will smash all previous LHC records for sustainable integrated lumi per 24 hour period - at least 1.0 1/fb. :dance: Notionally this consists of 2 switchovers (time of dump to time of next stable beams) and 2 runs. The switchovers can be 2 hours each and the runs ca...
Thanks so much for the exquisite detail. As a rank amateur I noticed that the peak initial lumi had been dialled back after 3 abortive starts at 2556b. Seems like starting with >20,000 lumi is a no-no, even though achievable.
t(SB) or the current stable beams duration is DIFFERENT on the Page 1 display and the Dashboard display (currently 10:10 hrs on Page1, 11:xx on Dashboard). Fixable? Which is correct?
Why is it taking so darned long to get to the maximum intensity? With 900 bunches as currently, that's only about 25% of the max possible. Put another way, each physics run could return four times more data at max intensity. So what's the hold up?