LIGO Document T1300014-v5
- Aligo, BSC Flooring + HAM ISI, Witness Sample Placement Requirements. See the Vertical Wafer Holder Notes for guidance on getting the wafers in and out of the vertical holders.
Version 5 includes update to the location for mounting the 1" optic on the structure of the optic. See below for details.
- FOR: ETM / ITM, BS, SR3 and PR3 (HLTS).
FROM: Placement of 1" optic on front edge of SUS structure (1" optic HR surface parallel to large optic HR surface)
To: Placement of 1" optic on side edge of SUS structure (1" optic HR surface perpendicular to large optic HR surface)
REASON FOR CHANGE: Worried about possibility of retro-reflections from main beam off of 1" optic in previous configuration.
SPECIFIC CHANGE: Added note on Pg.1 and Pg. 3 to indicate 1” witness optic should be mounted on the side of the structure and not on the front face of the sus QUAD, HLTS [SR3 &PR3] & BS structures to reduce risk of retro-reflection.
SIGNATURE REQUESTED: Calum Torrie
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