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- Access to add more ice.
- 9:00 PM: Running now at 800 V with a 145 uA leakage current. Tried again to reduce the rate by moving S10 to 0.5 mm, but saw no particles on the DUT! Now to 2mm to verify that the DUT still exists. Don't want to upset the operators, will wait for shift change to go back to 1mm.
- 00:26: asked to increase slits from 1 to 2 mm. Particle count before was ~10 (but double peak, so ~5) and after is ~30 (still double peak, so ~15). We got this from looking at the cluster multiplicity in the 3rd telescope plane (basically no noise).
- 1:10: asked for the S10 slits to be moved out the whole way (100 mm) so that we can quickly scan the sensor.
- 2:35: LCLS beam down for a user (they didn't tell us...had to ask when we noticed no beam). They say they will 'give up in 30 min' and revert back if they can't get the configuration they want. Powered off the HV in order to preserve the temperature.
- 3:55: Asked to go back to the 2mm S10 spacing to take some final data with LUB2.
- 4:25: Call from ACR - lost beam because LCLS users want 30 Hz. No comment on when it would be back.
- 4:35: Asked for an access to swap LUB1 and LUB2 (might as well while we have no beam).
- Just swapped LUB1 and LUB2, LUB2 back in freezer. Ran digital and analog scans during access and looked okay out of the box using LUB2 config. The threshold was not so great, but that could just be the threshold. Will use the proper one now. Adam (MCC) said that LCLS user is back to 120 Hz, so we could have beam again soon (Adam is by himself tonight !!!)
- Temperature very warm (~-10), tried turning on HV but tripped the power supply. Turned off HV and now waiting for temperature to cool back to where it was before.
- 7:00: Went in for an access to add more ice (now out of ice) because the rate of temperature decrease is too slow (done at 9 am!)