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Reports until 08:58, Thursday 19 April 2012
X1 SUS
stuart.aston@LIGO.ORG - posted 08:58, Thursday 19 April 2012 - last comment - 08:58, Thursday 19 April 2012(2639)
PR3 (HLTS) M1 Stage BOSEM Open-Light Measurements on New Triple Test Stand
[Stuart A, Gerardo M2 and Jeff B]

After making the final cabling connections to the optical bench ('vacuum' feedthroughs) from the triple test stand to the PR3 (HLTS) suspension all BOSEM channels could be observed to be present. Two harnesses to the M1 stage are laced at present (thanks to Betsy) with the lower stage harnesses only being required once magnets and AOSEMs are installed.

Using the new triple test stand + new iMac station in the staging building and extracting data with:- 
tdsavg 10 X1:SUS-HXTS_M1_OSEMINF_T1_IN1 (etc)

BOSEMs
------
s/n 311, open-light = 19528.6 (T1 to suspect container)
s/n 073, open-light = 26501.0 (T1) C connector

s/n 017, open-light = 19340.3 (T2 to suspect container)
s/n 061, open-light = 30538.6 (T2) B connector

s/n 019, open-light = 24897.1 (T3 to suspect container)
s/n 064, open-light = 29098.6 (T3)

s/n 577, open-light = 23854.4 (LF to suspect container)
s/n 069, open-light = 26619.2 (LF)

s/n 244, open-light = 24967.5 (RT to suspect container)
s/n 063, open-light = 27050.4 (RT)

s/n 698, open-light = 18031.3 (SD to suspect container)
s/n 700, open-light = 29138.9 (SD)

Identified a routing issue with T1 harness connected to T2 and vice versa. So these were swapped around, which did not require any re-routing of the harness as there was sufficient slack. After referring to the routing doc T1100612 it would appear that the connection to T1 is correct, but the connection to T2 should be connector D. This needs to be checked out to see if its a possible mislabelling or cabling issue.  

A new suspect BOSEM glass container has been established on the BOSEM storage shelf.

Blade stops have now been released and PR3 is re-suspended. Some alignment of BOSEMs and flags is still required as the LF flag can be seen to be rubbing.
Comments related to this report
stuart.aston@LIGO.ORG - 17:11, Wednesday 18 April 2012 (2645)
I have calculated the gains and offsets for the coil input filters on PR3 and updated the coefficients in the medm screens, so that BOSEM alignment can be carried out tomorrow.

(T1) s/n 073, open-light = 26501.0, offset = -13250.5, gain = 1.13
(T2) s/n 061, open-light = 30538.6, offset = -15269.3, gain = 0.98
(T3) s/n 064, open-light = 29098.6, offset = -14549.3, gain = 1.03
(LF) s/n 069, open-light = 26619.2, offset = -13309.6, gain = 1.13
(RT) s/n 063, open-light = 27050.4, offset = -13525.2, gain = 1.11
(SD) s/n 700, open-light = 29138.9, offset = -14569.5, gain = 1.03

This needs to be updated on the ICS
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