aLIGO LHO Logbook

H1 AOS (AOS, SEI, SUS)

douglas.cook@LIGO.ORG - posted 11:48, Friday 28 February 2014 - last comment - 12:55, Friday 28 February 2014(10410)

IAS check of "coarse" position of the ETMy looks good

(Doug, Jason, Hugh, Betsy and CO)
First look at the ETMy in chamber measurements are very encouraging. 
Results:
Longitudinal was short by 0.5mm from absolute, tolerance is +/- 3.0mm,
Lateral position is 0.35mm to the south, +/- 1.00mm
Elevation position is high by 0.35mm, tolerance is +/- 1.0mm

Optic is set lightly on EQ stops, but for a first look to identify any need to move the ISI or SUS this is very reasonable results.

The arm cavity baffle was rough positioned to accommodate the line of sight from the spool and currently rests unattached on its installation table so use caution when working around it.

When fully pay loaded, cabled with the ETM suspended we will do the the fine alignments of the positions and optic angles

Comments related to this report

douglas.cook@LIGO.ORG - 12:04, Friday 28 February 2014 (10411)

Link

Forgot to mention that the particle counts were 3-4 counts on the .3 microns scale and 1-2 counts on the .5micron scale at the spool while we occupied that area.

Kudos to the folks that keep the VEA clean and well stocked with garb and cleanroom supplies.

jason.oberling@LIGO.ORG - 12:55, Friday 28 February 2014 (10414)

Link

The vertical position is actually high by 0.9 mm, not by the 0.35 mm originally stated.