Reports until 15:55, Tuesday 16 April 2013
H1 AOS
douglas.cook@LIGO.ORG - posted 15:55, Tuesday 16 April 2013 - last comment - 18:04, Tuesday 16 April 2013(6104)
BS Baffle alignment issues 
The Y-Arm elliptical baffle is aligned within spec. < 3mm lateral and vertical

However, the X-arm continues to give us mounting errors. This may require the mounting base to have existing holes elongated in order to mate up with the threaded holes on the stage "0" or at least an investigation into why we are unable to fit it up in its aligned location. 

If holes need to be slotted we will loose a week with the dissembling, modifications, clean and baking reassembly and installation.
A week longer for the spool to be out.

Another option may be that we can remove the baffle modify it and reinstall and align it just prior to installing the ITMx while we have an open path.

I will notify Calum, Lisa, Mike Smith, Mike Landry and Brian as LLO may see the same problems
Comments related to this report
gerardo.moreno@LIGO.ORG - 17:54, Tuesday 16 April 2013 (6106)
Link 

Items to remove from ITMY elliptical baffle:
- 1 Variable Height Adjustment Bracket (D1102321)
- 1 Transport, Locking, ACB (D1101285)
- 10 1/4 x 20 bolts and washers, holding both items above

The ITMY elliptical baffle was left locked, due to the possibility of staff going in chamber in the near future, the flexure that suspends the baffle is very small and fragile, vulnerable to twisting forces.
Images attached to this comment
gerardo.moreno@LIGO.ORG - 18:04, Tuesday 16 April 2013 (6107)
Link 

Photos of issue with ITMX Elliptical baffle, photos were taken as the baffle sat within tolerance, but there was no clearance for the mounting bolts, since we only see a little bit of the mounting holes.
Images attached to this comment