Reports until 14:38, Wednesday 28 August 2013
H1 SEI
hugh.radkins@LIGO.ORG - posted 14:38, Wednesday 28 August 2013 - last comment - 08:53, Thursday 29 August 2013(7565)
WHAM6 Chamber ready for doors
Before lunch I got the sign off on the Optical Table position from IAS (Jason;) I expect you'll see an entry from him shortly.  This was preceded by an elevation survey performed by myself and GregG:

Our initial level had an 11mil runout about 4mils low per target (D1100398/E1000403).  We did a couple small large Spring adjustments and finished at <8mils runout at -220.1mm average elevation Gz (0 error from spec.)

After IAS was done, I activated the CPS, recorded locked positions and then unlocked the IAS.  I repeated the lock and unlock recording the CPS all around.  The largest change observed was <1200cts or 0.04mm, comfortably under our <1600 cts max lock/unlock change.

WHAM6 has dummy payload on viton suitable for testing and is ready for doors.

One final thing--conferring with Bubba/Apollo: I will lock the HEPI this afternoon and will not install HEPI electronics.  Will keep the Dial Indicators in place to monitor HEPI position--please respect these.
Comments related to this report
hugh.radkins@LIGO.ORG - 16:22, Wednesday 28 August 2013 (7567)
The HEPI suspension is now locked.  Other Chamber area preps have been completed.
jason.oberling@LIGO.ORG - 08:53, Thursday 29 August 2013 (7575)

Final measured XY position/yaw errors of WHAM6 ISI:

  • X-axis Position Error: -8.8 mm
  • Y-axis Position Error: +13.75 mm
  • ISI Yaw Error: 50 µrad CW