Reports until 16:14, Thursday 07 March 2013
H1 SEI
hugh.radkins@LIGO.ORG - posted 16:14, Thursday 07 March 2013 (5706)
BSC2 ISI In Chamber Cabling & Optical Table Elevation Survey

We dropped the Cabling from the ISI down into the chamber and plugged the CPS cabling to the in-chamber feedthrus.  These signals will allow ISI to balance etc the floating stages as well as confirm the health of the CPS which often suffer from rough handling.  This may have occurred with the C3 covers and other work during the Cartridge install yesterday.  The other sensor cabling was not connected to the feed thrus.  These need a little doctoring and dressing and we needed to limit our time inside.

Before exiting we shot elevation/level of the optical table with the optical level.

Nominal elevation of a BSC ISI Optical Table is +1661.7Gz; BSC2 has no global to local correction.  The Beam Splitter though is being set low by 2.9mm(percomm-DCoyne).  I don't know if IAS has any vertical adjustment to correct for from the Test Stand Alignment.

Attached is my survey logbook page.

The average elevation of the Optical Table is 1658.0mm with a 0.4mm range of readings.  This puts the Optical Table currently low by 0.8mm and out of spec for level by 2x.  Still not bad.  I also recorded the Dial Indicator readings so we can muck around with this if possible.

Non-image files attached to this report