How to proceed with the partition USA15_ABBA

How to filter ERS messages for CALO/FWD subdetectors


How to restart the LAr Monitoring segment (to reset histograms and clean DQMD warnings/errors)

  • This is especially useful if a TTC restart was performed to recover from an error and you want to have a clean set of histograms to make sure the errors are not recurring. Only after permission from the LAr RC!
  • Go the Run Control desk
  • Ask the Shifter Leader to restart the LAr Monitoring segment (under LAr).

  • If the monitoring segment keeps crashing, call the LAr Monitoring expert

How to restart the LArHistogramming server

  • Ask the Run Control Desk to do the following:
    • in TDAQ GUI, in the Run Control Panel, click on "ROOT Controller" at the very top of the tree
    • in the right window, select the "infrastucture" tab
    • in the infrastructure tree, look for the LArHistogramming server. Right-click on it, and restart

How to take special runs with LAr while the ATLAS partition is still active -- disabling LAr inputs for L1Calo

  • This should not be necessary during cosmic runs, as the pulses from the LAr should not usually go through to the trigger. During a more sensitive run, it might be desirable to mask the LAr.
  • The Run Control shifter should disable LAr in the "Segments and Resources" panel
  • They need to disable the L1Calo triggers for LAr, otherwise actions taken by LAr (for example, Calibration pulses) will trigger the run.
    • After they boot the new run without LAr, go to the "L1Calo" tab
    • Click the tab at the bottom called "CaloMask"
    • Check each box that says "LAr*" (don't forget the ones at the bottom for HEC and FCal)

How to open the BPTX Monitoring Plots

  • From the DAQ Panel, in the Mon Advanced tab, open the OH Display
  • In the left panel of the Histogram Display window, go to initial / BPTXDaq. Open the Wave_BPTX1, Wave_BPTX2 histograms.
  • Then under ATLAS / GlobalCombinedHistograms / SHIFT / Tile / MBTS / Cell, open the TimeDiff_A-C and TimeDiff_A-C_LB histograms.

How to monitor the FCal currents

  • When the beam is being injected or in a potentially unstable state the currents in the FCal should be monitored:
    • In the LAr DCS window click on the "Infrastructure" tab on the left
    • This will bring up a screen called "Currents in LAr Calorimeters"
    • Right click on the green box with the numbers, to the right of "FCAL_A_GOOD". A plot of the average currents in FCalA (of the good channels) will pop up somewhere on your screen (you might have to search for it).
    • Repeat the previous step for "FCAL_C_GOOD".

How to correlate a HV module, channel with eta,phi

  • Obtain the corresponding HV module (e.g., M173) and channel (e.g., C9) numbers from DCS or the HV expert's elog post
  • Open the LAr ID Translator. Check the "expert box and click submit."
  • Construct the HVLINE in the proper format (6 digits with leading zeros if needed) by combining the module, channel numbers. Some examples:
    • M173, C9 --> 173009
    • M6, C1 --> 006001
      • TIP: Check that the query results are the ones desired, i.e. when searching for 006001 you don't want 236001 or 286001 etc. Make sure you add leading zeros.
  • Enter the HVLINE number and click submit.
  • Determine the eta, phi range from the output.

How to test the OPC Servers

  • These tests are discontinued until further notice.
  • The OPC servers send voltage, current, and status information from the hardware (e.g., the HV modules) to the DCS FSM panel and on to a database
  • It is important to check that these servers are not "stuck"; if they are not sending data we are blind to the current state of the system!
  • It is important NOT to perform the test while HV experts are performing interventions on the system (such as ramping up/down HV values). If such an intervention is ongoing, please wait for the confirmation of the HV expert that it is over before resuming the tests.
  • In order to check the connection, follow the instructions on the twiki:

How to connect to a SBC

  • A list of the LAr machines can be found on the LArComputer twiki.
  • In a terminal type:
    • ssh sbc-lar-rcc-emba-02
  • If you can not connect, the sbc will need to be reset.

How to create L2 Rate Plots

  • Open the Trigger Rate Presenter (TRP) from the DAQ Panel
  • Under the "Tables" tab select the L2 tab.
  • Then select, for example, in the output column, could select cells L2_em5_empty_larcalib, L2_PreS_L1EM5_empty.
  • Use Ctrl-click to select multiple items.
  • Press the "Plot" button; 2 curves should be visible in the new window (trp)
  • To save the image, right click in the "trp" window and choose "Save image"

Background information:

  • Acronyms:
    • PS: prescale factor
    • DT: deadtime fraction (1=100% dead, or no output rate) of a particular trigger item
    • TBP: rate before prescale
    • TAP: rate after prescale = TBP/PS
    • TAV: rate after veto = TAP*(1-DT)
  • For example, these L2 algorithms are specific to LAr monitoring of EMPTY trigger rates and are built on top of L1_EM5_EMPTY:
    • L2_em5_empty_larcalib is a partial event building algorithm designed to write out small events (~170kB) at a higher rate.
    • L2_PreS_L1EM5_empty cleans barrel presampler noise (rejecting events that have more than 80% of the energy deposited in the presampler).

How to create Chain Rate Plots

  • Open the Trigger Rate Presenter (TRP) from the DAQ Panel.
  • Go under the "Tables" tab and use Ctrl-click as you will select multiple items.
  • In the L1 tab, select L1_EM5_EMPTY (TAV column).
  • In the L2 tab, select L2_PreS_L1EM5_empty (input), and then L2_PreS_L1EM5_empty (output).
  • In the EF tab, select EF_PreS_L1EM5_empty.
  • Press the "Plot" button; four curves should be visible in the new window (trp). This shows how the primary trigger item L1_EM5_EMPTY is filtered through the chain before it is written out to disk with EF_PreS_L1EM5_empty. The rate of EF_PreS_L1EM5_empty should be below 1Hz (excluding occasional rate spikes).
  • To save the image, right click in the "trp" window and choose "Save image".
  • Specific to EF_*LArNoiseBurst* chains: use log-scale on the y-axis.

How to create Stream Rate Plots

  • Open the Trigger Rate Presenter (TRP) from the DAQ Panel.
  • Go under the "Tables" tab and use Ctrl-click as you will select multiple items.
  • In the L2 tab, filter with "LAr" and select LArCellsEmpty_calibration (output).
  • In the EF tab, filter with "LAr" and select LArCells_calibration (output).
  • In the EF tab, filter with "Cosmic" and select str_CosmicCalo_physics (output).
  • Press the "Plot" button; three curves should be visible in the new window (trp). Excluding occasional rate spikes, the average rate should be:
  • To save the image, right click in the "trp" window and choose "Save image".

How to change the filter settings for the DCS Alarm screen

To filter the alarms in the combined "CAL" Alarm screen:

  • At the bottom of the alarms screen there is a box with the title "Filter settings". Within this box at the far left, Check the "Systems" box.
  • Just below this, click on the panel showing all the selected systems and a window will open with selected systems highlighted orange.
  • Unselect all of the Tile systems, ATLGCSLUMI, and ATLCIC* (and anything you don't want) by clicking on them (They will become white).
  • Click OK to close the window.
  • At the bottom right corner of the "Filter settings" area click the "Apply Filter" button to apply changes.
  • Note that as of 16 Feb 2011 the CAL Alarm screen comes up in this configuration by default. You can still use the above instructions to change the configuration if there is some reason to add or remove items.

-- VincentPascuzzi - 2017-04-02

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Topic revision: r2 - 2017-04-05 - VincentPascuzzi
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