I noticed that the 3rd arm rate did not change after finishing dilution runs for p=0.9108 and moving to production. Last dilution run was with dummy (Run 41330, trigger rate ~ 400Hz). Since this run all the 3rd arm runs have same low rate (~400Hz). Is the target encoder not reporting correct position? But then I guess target is polarized, so it must be in position.
The spot_3 for the production runs for p=0.8562 GeV looks like dummy target spot pattern (faintly visible NMR coil)