Doing the Crosstalk Correction

Load a detector map file from "File" / "Read Detector Map File". The first segment will show up in the window on the right. Click the "Crosstalk Correction" button. Now, for each segment do the following:

1. Display the segment by choosing it from the "Correct Crosstalk for Segment" droplist. It might make sense to correct for the clock if the detector map was recorded with short dwell times (where you can see the motor acceleration).

   Figure 16: Doing crosstalk correction in detcal_gui. We can see the contribution of Segment 1 to Segment 2.

   

2. Set the display maximum to something lower so that you can see contributions from other segments. Somewhere between 5 and 15 percent will be the limit below which you can't even see the segment itself. Stay just above that limit.

3. If you see a contribution by some other segments, choose these segments from the "Contribution of Segment" droplist (one after another) and play with the crosstalk coefficient until the contribution is gone. You can write a number directly into the field, or you can increase / decrease the value in steps of 0.05 percent with the arrow buttons provided. You might have to play with the display maximum.

4. Move on to the next Segment in the "Correct Crosstalk for Segment" droplist if you have eliminated the contribution of all other channels.

When you are done with all segments, click the "Finish Crosstalk Correction" button. You can write the crosstalk matrix to a file, or continue with the next calibration steps. Fig. 16 shows how the GUI looks like while doing the crosstalk correction.