Here is a look at the helicity-correlated beam properties for this running period (so far), using GOAT++.
Things look very good! I may be over-interpreting, but
I notice that the central values for several of the parameters
are slightly off from zero, but have very similar central
values (eg y-angle differences of 1.8 nrad with IHWP=OUT and
1.9 nrad with IHWP=IN); this means that the half-wave plate
reversal will tend to cancel out false asymmetries due to these
parameters. So, whiel the central values are nicely small, the
effects on the data should be even smaller.
Figure 1
