| Around noon, Keerthi adjusted the PE down to reduce the intensity of the Mg beam, as we are running with attenuators in. He ended up with about a 30% reduction, and improved the noise band by about 3x in the process.  Here is a repeat emittance scan. Both sets of slits are at 2.5mm position. I also took the opportunity to reset the separator stability equipment again. Interesting, the beam took a step down a couple of minutes after hands-off. A tweak on the separator suggests that it's already about optimized. Well... Sophia is back to tuning now. |