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Reports until 17:14, Wednesday 28 February 2018
H1 CAL (CAL)
richard.savage@LIGO.ORG - posted 17:14, Wednesday 28 February 2018 - last comment - 22:20, Thursday 19 July 2018(40777)
Pcal ETMY baffles and shields installation work complete

StephenA, AlenaA, NikoL, MarekS, JimW, RickS

Jim and crew completed the installation of the shield panels today.  They also adjusted the compression of the upper-right (when viewed from the ETM) flexure gap to ~0.220".

Everything seems to be installed as designed.

NikoL, MarekS, TravisS, RickS

Began assessing the centering of the Pcal beams on the input and output apertures using targets mounted to the Pcal window flanges on the A1 adapter.  We plan to continue this work in the morning, going inside the vacuum envelope to assess centering on the Pcal periscope relay mirrors. 

We plan to install the Pcal target on the ETM suspension cage for this work.

Comments related to this report
alena.ananyeva@LIGO.ORG - 23:13, Wednesday 28 February 2018 (40781)SYS
Reflections of the beam tube surface in the baffle not to be confused with smooth finish of the baffle on this photo
Images attached to this comment
stephen.appert@LIGO.ORG - 18:11, Friday 16 March 2018 (41040)
Here is a photo logging S/N of periscope components, collected during the above PCal Yend Baffle and Shields install effort. These articles conveniently do not appear to be assembled into any of the existing D1200174 assemblies. 

:(
Images attached to this comment
stephen.appert@LIGO.ORG - 22:20, Thursday 19 July 2018 (42985)

Previous work: LHO aLOG 40759

Build records: T1800172

Summary of flexure measurements documented in T1800172:

2018 LHO End Y Flexure Gap, before baffle install
Flexure Location (viewed from Front per D1200174-v8) Flexure Gap (in)
Upper Left .210
Upper Right .230
Lower Right .150
Lower Left .110

2018 LHO End Y Flexure Gap, only pending outer baffle (D1700365) install

Flexure Location (viewed from Front per D1200174-v8) Flexure Gap (in)
Upper Left .210
Upper Right .220
Lower Right n/a
Lower Left n/a

2018 LHO End Y Flexure Gap, all baffles installed

Flexure Location (viewed from Front per D1200174-v8) Flexure Gap (in)
Upper Left .220
Upper Right .220
Lower Right n/a
Lower Left n/a
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