How to take fluorescence spectra with the Ketek detector

for AUTOMATED filter selection (the program will search for optimized transmission settings) select this option, inspect the spectrum and start the scan if the values are reasonable
OR select the appropriate transmission manually:

move in an optimal amount of filters to avoid saturation and to spare your sample
- this means:
  - maximum filters to get a signal at all (start with around 0.001 beam)
  - take a spectrum - already signal?
  - do not saturate the detector - dead time of below 20 % is ok. (5 % to 10 % good).
  - successively take out filters until good signal (peak at beam energy and at the expected line of your sample if you are ABOVE the absorption edge)
start the scan
check the calculated values of inflection and peak carefully (is the fit reasonable? "visual inspection")
go to the desired energies for peak and inflection etc.
- either from the MAD GUI
- or from the IDL session (start feedback again after changing energies)