1A SLM spot significantly degrading with increasing pass. Beam Loading?
While the ArcSteer test plan was running beam to 1R, noticed the 1A SLM appeared really good compared to what it looked like running to AR for orbit checks after GSET0'ing 1L19-5. Once the test plan was finished, went pass by pass to check, and sure enough, the beam is getting progressively more smeared out with each pass. Obviously we aren't seeing fifth pass beam leaking into arc 1, so perhaps we're seeing some RF cavities struggling with beam loading?










