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- Started Run 751, -36C, Ileak=340uA. Moved Yfine up by 4mm but moved more like 8mm. This run covers X=(42 - 62). 12K events. The histogram save for this didn't work. I rushed starting next run before this was complete ?
- Started Run 752, -34C, Ileak=380uA. Move Yfine back -4mm to recover the last strip X=(30 - 50). 12K events.
- 17:20 MCC called asking to taking beam to full 120Hz to primary expt briefly. Ended run 752 with ~5K events. Missing saving histogram.
- 17:26 They returned faster than I thought. Run 753 continue with same setup as last run. End with 7.5K events.
- 17:52 Run 754: Yfine +4mm back to X=42-62 strip again. Ended wtih 9K events.
- 18:26 Run 755: Yfine +4mm to the final strip X>60. Ileak=480uA. Tgas=-31C.
- Access to swap in LUB2 since it looks like the LUB2 runs missed beam spot. Took out the wood chip to get block in contact to dry ice partition and sprayed some dry ice from chamber to DUT chamber. Moved HV control back to Bertan remote control. DUT box Xfine shifted x+28mm to compensate for the removed wood chip. Whole Caladium dropped 2mm to allow beam seeing full DUT height.
- Operator told me no more beam after 9pm. LCLS going to low E. There might be chance for intermitant beam tomorrow afternoon.
- 20:50 Gas temperature is dropping very slowly and only reached -26C. Can get HV to 600V but ran out of time to locate beam spot and they are changing beam energy already at 8:55pm. Looks like this is it for the cold run. Out of beam and out of dry ice.
- No beam until at least tomorrow afternoon.
- Access to dismount the cooling box and putting LUB2 back to the freezer in ESA. DUT rotational stage back on with RTISC4A mounted for possible more beam session. LV=2.0V and fully powered current=0.3A. HV=-80V (reading -86V) and bias current = 1.6mV = 0.16uA. Created a new module type RTISC4A using Seigei's script duplicate.sh to copy from fei4bexample. Threshold calibration from the clone shows large noise and large threshold dispervisiondispersion. A quick attempt of tuning with fasttune-3000e-10Tot16ke-noisemask.pl got stuck with `subsription disconnected'. Leave this to Martin.
Oct/4
- 8am MCC meeting got a tentative agreement to potentially let us in sporadically during MD in the afternoon (1-7pm) but no guarantee.
- The apparent low efficiency of the RTI module from early data taking is explained by the fact the 225 calibration used at the time disabled very large fraction of the pixels.
- Martin calibrated RTISC4A in the lab perfectly fine with 140e noise, but setting up on the DUT platform also saw large noise. Changing LV supply and HV supply to Keithley, connecting ground wire etc all had positive or negative variations but inconclusive. The biggest effect was actually tuning off the Yfine stage holding current which we kept off and reached a setup that gave noise at 200e and narrow threshold spread at tuning (but broadened some later). This calibration (555) is now the RTISC4A default config. Several row at the bottom and top and edge columns have some problems but most pixel away from the edges are looking fine, with just a few problematic central pixels. Another curious effect is for noise scans, one most of times have two large blocks of rows showing bad noise on every pixel in the block for a probability of ~few x10**-5. The top block always start from row 256. Since this is a low frequency effect, the setup is good enough for efficiency tests.
- In preparation for the beam run with all components, Timon updated YARR to readout 10 clock ticks to cover the double pulse events.
- While trying to test an auto-trig configuration with Caladium+RTI+FE65P2 together, the YARR server esadutlbnl1 seemed to have stuck and not responding to pings. Had to go down the pit to power cycle. Moved its power line to the first channel of the remote controlled poser strip. However, it looks like this may not help much as the PC still needs to hit a manual botton at front to start. It is back up in any case but we lost the one open window connecting to it. Also noticed from the open side panel of esadutlbnl1 that a fan on the top left corner is not spinning. .