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    User name ellie

    Log entry time 12:58:59 on April 28, 2009

    Entry number 269453

    Followups:

    keyword=What's up with the HAND

    Here is what's going on at the moment with the neutron detector:

    1) We're getting the sloping TDCs. They did flatten out when we increased the discriminator thresholds (Runs 20399 [-75mV], 20400 [-100mV], and 20401 [-50mV]) but then we reset them back to -50mV. Discussing whether to keep them at -50mV or change them.

    2) Yesterday when I fiddled with the N2-6L discriminator wires to see if I could get it's TDC signal back, I put the ribbon cable on incorrectly (HALog 269195). It sounds like there's going to be an access during the first half of swing shift today, so I'm going to go down into the hall and fix it when that happens.

    3) The replay script has a problem analyzing two runs in a row without quitting the analyzer/root. To work around this at the moment the 3rd has to exit the analyzer and restart it after every replay. Instructions for this were added to the front room and the current 3rd informed that he has to do this. Troubleshooting for this is on the list of Things To Do, but might take some time before it's fixed.

    4) I'm not finding any peaks where I feel comfortable doing gain matching on. I could use some help with this. I took some cosmics runs yesterday (20447 through 20453) but there's not as much there as there has been during previous cosmics runs. Only 20447 was on the DAQ's ROC8Only configuration, the rest were on RightHrs. I was told by Bob that this shouldn't have caused a problem, so I let it run. Bryan has informed me that the neutron detector can only take cosmics when the configuration is ROC8Only.

    5) The pedestal scripts for the analysis are now working. The output is set up such that it will make an easy copy/paste in the ~adaq/e05-102/onlana/DB/20090424/db_NA.nd.p#.dat files. I'm backing up everything before I change anything with those files. The pedestal scripts are in ~adaq/e05102/ellie/pedestal_run_analysis/. To load them, go to that directory, start the analyzer, then use the command ".x/ ND_n#_pedestals.C" where #=1, 2, 3, 4, or v (representing each plane). The easy-to-copy/paste data is then put into a subfolder ped_data/ and a version of data with more information on it is put in the subfolder ped_data/more_ped_info/. Screen captures of the plots that run are stored in the subfolder ped_data/ped_fit_pics/.

    6) There might be a problem with the scintillator in the 3rd plane, 11th bar from the top. Whereas (on an exponential y-axis) some of the TDCs have a more-or-less even slope, both the Left and Right TDCs for this bar have a slope that's increasing as the channels go to 0. Discussion is ongoing.