AGS Polarization Maintenance Tips


Typically, if polarization is hovering around 60% or below, it is likely one or all of the following three things go wrong:

1. Vertical tune is not in the right range at 262ms. It should be higher than 8.98, but lower than 8.985.
2. Vertical tune is not high enough at 578ms. It should be higher than 8.985, ideally even higher than 8.99.
3. The sine 9th harmonics amplitude at 578ms not on the positive side. It should be around 2-4mm.