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Procedure to Check Beam Quality
Even if you get a high beam intensity, it does not necessarily
mean that you have a good beam. The final thing is whether you can get good
diffraction out of your sample. Mount an alignment crystal, take a shot
and compare the diffraction with previous pictures that are considered to
be good. The tricky thing is that for quantitive comparison, you have to
make sure the crystal is mounted with the same orientation as the last time.
This could be troublesome because users of this lab may do the same frequently
and everyone does diffrently. However, this should at least tell you whether
the beam is bad if you do not get any diffraction at all or what you get
is simply too much worse than your expectation. For details, check with
R-AXIS Readout
On the other hand, the minimum you can do is to check the direct
beam in terms of its intensity and shape.
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