The TAS Calibration Procedure (as implemented now)

The TAS calibration procedure is now provided by an A. Basili GUI interface:


The calibration consist only in the START ALL button execution. You can monitor the progress of the procedure from the graphical interface. All the ten diodes were switched on and acquired one-by-one. If the START ALL procedure fails you can take a TAS calibration simply pushing one by one the START of each diode procedure.

Here there is the actual run sequence:

LDDR Diode Notes
0 0 From top to bottom (Columns 2 and 5)
0 1 From bottom to top (Columns 1 and 3)
1 0 From top to bottom (Columns 2 and 5)
1 1 From top to bottom (Colums 2 (only one peak) and 4)
2 0 From top to bottom (Columns 1 and 3 (only one peak))
2 1 From bottom to top (Columns 2 and 3)
3 0 From bottom to top (Columns 2 and 5)
3 1 From bottom to top (Columns 1 and 4)
4 0 From bottom to top (Columns 1 and 3)
4 1 From bottom to top (Columns 4 and 5)


  • The laser intensity is fixed at 20 mA
  • The average event size for each one of these runs is 10 kB
  • There is not an additional delay time (the default one is used)

The TAS Calibration Procedure (as designed)

The sequence should consists of:

  1. Set the busy and slave masks excluding all sub-detector excepted Tracker
  2. Set the ladders on the TAS column mode selected (provided that the correct config files have been loaded)
  3. Switch on the selected LDDR
  4. Take data for 10 seconds at 100 Hz (~1000 events)
  5. Repeat for the other columns/diodes.

The A. Basili TAS Controller is not providing the procedure as described here, misconfigurations of the Tracker could happen if something fails!

More details in the Philipp DSP Code documentation page.

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PNGpng TASController.png r1 manage 23.3 K 2010-08-16 - 01:03 AlbertoOliva TAS Controller (August 2010)
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Topic revision: r1 - 2010-08-16 - AlbertoOliva
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