...
Done for tonight
Nov/3:
Plan Plan of the day:
9am9am-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.
Activities: Timon, Ben, Su Dong, Zijun, Ke
9:30: Access to continue setup started.
10:30 FE-I4 telescope installation saw some sensitive HV current fluctuations on on module. The module box not light tight enough ? Some Al foil wrap shield away light helped somewhat. Looked fro CAT6 cables at ESA and SLAC to instrument FE-I4 data/Cmd connections. Cables are of somewhat different types. Last plane (5) had trouble with digital calib initially but worked after replacing with another data cable.
11:30 Moved the back XY-stage to +ve X into the beam line. Also adjusted the Y move down by 3-4cm into the beam line. The horizontal laser battery ran out which we replaced but the push of it made it very difficult to reinstall sot hat it is temporarily mounted on the frame next to beam exit window and its tilt changes with rotation so cannot be relied on for the moment.
12:30 Completed installation. Exited ESA and requested beam.
12:45 Operator reactivated the same setup from last night. Beam spot still at the same place and size as last night, but particle rate is down to ~50. Will keep going with this.
12:45 Moved back stage X by -75mm to take the FEI4 modules out of beamline for calibration and threshold tuning.
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.