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10:30pm MCC thought they are close to be done with tuning so we started to move Caladium coarse X in reduced x direction and running the Caladium only readout. Before reaching the beam spot, the secondary scatter was ~50 particles/shot but once beam spot came into the frame, that turned to be more like 2000/crossing. Beam spot was also very wide in X ( more than the 2cm MIMOSA aperture). Asked MCC to reduce rate and spot size. a few tries didn't make much impression until a move to close down SO10 to -0.5. That brought the rate down to ~100 particles/crossing. Beam spot is filling good fraction of aperture ans looks like a good tuning setup to start with tomorrow. Run 336 tuning beam spot picture below.
Done for tonight
Nov/3:
Plan Plan of the day:
9am 9am-9pm Day shift will continue with 5Hz beam running with XPP as primary expt. We expect to start ~9am for access to continue towards full setup for RD53A and cosmic telescope then run until 9pm.
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