The APS changed to a reduced horizontal beam lattice configuration Nov 13. During beamline setup on Nov 13, it was noted that the quality of the focused beam had degraded, flux was decreased and that the storage ring beam delivery angles had changed.

After consultation, on the morning of Nov 14, staff requested the APS to re-optimize storage ring steering at our sector. This has appeared to restore the beam focus and intensity.

If there are any questions or concerns about this, or if the users on Nov 13 have noticed problems with data, please contact the staff.