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1. If you are multiplexing with XPP, make sure to call XPP to ask if you can change the mono energy for the next few minutes.
2. Check the XRT spectrometer camera (camViewer -c fee_spec)
   
   
   If needed, move the camera Y position, so the spectrum is centered on the camera (the XRT HXSS Spectrometer window to do this can be found in mfxhome, under the tab "LCLS").
   
3. If the center spectrum is not on the center, move the camera angle(0.1deg step)
4. Make sure the spectrometer data is being collected by the DAQ (selecting the partition "FEE_SPEC0" in the DAQ). Open up the AMI screen.

5. Start xpppython (you can also use xpp3)

   Code Block
   language bash
   ssh xpp-monitor cd ~xppopr/bin ./xpppython

6. Move in the monochromator and check the energy the XPP monochromator is currently set to in xpppython

   Code Block
   language py
   lom.h1n.mv(0) # the value of 0 is first crystal "in" and -10 is first crystal "out" lom.E1C.wm()

7. Record the spectrum for 1 minute using the DAQ.

8. Change the XPP monochromator using 10 eV steps. It is recommended to record the position at the intended X-ray energy for the experiment, +10 eV, +20 eV, -10 eV and -20 eV. For example:

   Code Block
   language py
   lom.th1C(BraggAngle('C*',(1,1,1),9.41))

   Warning
   Never move EC or E1C ! Only move th1C!

   
   Record another 1 minute run every time you move the monochromator.
   
   

   Tip
   title AMI feedback
   Set a reference in the AMI screen, to ensure the notch is moving: Ensure that the notch remains within the X-ray spectrum:

   
   
   

9. Move back the E1C mono th1 to the intended energy. Inform XPP you are finished with the calibration, in case you are multiplexing.

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