Reports until 19:09, Thursday 29 August 2019
H1 AOS
sheila.dwyer@LIGO.ORG - posted 19:09, Thursday 29 August 2019 (51625)
Some changes to MICH_BRIGHT in INIT_ALIGN guardian

TJ, Sheila, Jeff K Corey Keita

We were seeing the typical difficulties with MICH_BRIGHT not locking (see Jenne's investigations of the cause of the problem here 51409 ) When ALIGN_IFO recognized that MICH isn't locked, it goes to DOWN, but then immediately tried to relock, when the beam splitter is still swinging too fast.  TJ and I edited INIT ALIGN so that it will set the request of ALIGN_IFO to DOWN in this case and wait 30 seconds before re-requesting MICH_BRIGHT.  

This doesn't solve the problem with the MICH locking, it just prevents us from pointlessly cycling between DOWN and MICH locking while the BS is still swinging too much.