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13:00 Carsten called. Lead Glass counters (Scope ESA brown trace) was left at 900V and 10mV/div scope display last night in anticipation of primary beam. He raised the HV (to 2K?) and scope back 50mv/div. Signal size 50-100 mV for the ~50 particles per shot. He moved the counter slightly to verify signal went away so it looked like crudely beam doesn't have duffused tail.
End of the night data-taking:
from 7:45 PM to 8:25 PM Run 400. A long run with one RD 53A module and full MIMOSA (full 10k events). The beam did not cover the entire RD53A sensor area, so Ke and Sanha tried tuning the fine position to move the module around
from 8:50 PM to 9:00 PM Run 407. A short run (due to beam shutdown) with somewhat better aligned RD53A position. The short-side (horizontal direction) is well-covered by the beam. On the long-side (vertical), the beam still seems to be 100~150 pixels off the center; the module has to be moved 5~7.5mm down (up...?). Note that the beam shape is extremely asymmetric in the vertical-direction. Current RBV config: X coarse 115.41mm, Y coarse 3.83mm, Y fine 7.69mm, X fine -56.53mm, Rotation 213.51mm