4. How to change the energy
Click MONO ENERGY in
the
left
top
portion
of the menu (auxiliary computer); you have two choices of
changing energy – using "edge selector" ( you choose the desired
element from the periodic table and its K-, L- or M-edge) or clicking on "specify discrete energy" ( you type any value in the range 6000-20000eV) ; click "cancel" if you change your mind. See the beamline personnel, if you need to use energy above 13600eV.
Figure 11. Energy change dialogs
Unless you change energy below 8200eV, it takes less than one minute to change energy, wait until the green light indicates "SYSTEM READY/STABLE", in the top left portion of the menu click both TRIM X and TRIM Y POSITION (the X/Y beam position values should have green color). The energy change below 8200eV involves changing the mirror strip -- it takes about 10 minutes to finish. So, be patient.
The system will perform an autoalignment (see Figure 8 ) after EVERY energy change more than 500eV. Please be patient –let the system to find the beam!!! ( 1-2 minutes )
Note: Do
NOT open the hutch door or close the main shutter, if the system is
changing energy or doing autoalignment.
This may
results in the mechanical damage to MD2 and the beam may be lost
This may results in the mechanical damage to MD2 and the beam may be lost