R&D (FilterCavity)
NaokiAritomi - 15:50, Monday 24 June 2019 (1421)
Alignment of green is really bad after weekend

[Aritomi, Eleonora P]

After weekend, if you use the same parameter as last week, green alignment is really bad and injection and reflection of PR chamber is like an attached picture. It's completely out of range of DGS control loop and we couldn't recover the alignment with DGS. We have to align with picomotor and oplev, but we haven't done yet. We should think about how to solve this otherwise we have to start from alignment with picomotor and oplev every time!
After weekend, if you use the same parameter as last week, green alignment is really bad and injection and reflection of PR chamber is like an attached picture. It's completely out of range of DGS control loop and we couldn't recover the alignment with DGS. We have to align with picomotor and oplev, but we haven't done yet. We should think about how to solve this otherwise we have to start from alignment with picomotor and oplev every time!
After weekend, when we use the same parameter for DGS control loop as last week, green alignment is really bad and injection and reflection of green at PR viewport is like an attached picture. It's completely out of range of DGS control loop and we couldn't recover the alignment with DGS. We have to align with picomotor and oplev, but we haven't done yet. We should think about how to solve this otherwise we have to start from alignment with picomotor and oplev every time!
 
Images attached to this report
1421_20190624085029_img7594.jpg