peter.king@LIGO.ORG - posted 16:21, Monday 16 October 2017 - last comment - 23:42, Friday 20 October 2017(39049)
Output Faraday rotator in (from) HAM5
The Faraday rotator (SN002) was removed from HAM5 since it was thought that it would used for the
output Faraday isolator rebuild.
We noticed that there are two damage marks on the TGG crystal. Perhaps consistent with a
tool impact at some stage due to the strong magnetic field. In addition the TGG crystal is not
epoxied in place and is loose just like the one in SN003.
Given the above, the output Faraday will be rebuilt using SN003.
Gerardo / Peter
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Removal of OFI components:
Along with the rotator SN002 we disconnected cables for the 3 AOSEMs, removed all AOSEMs, also locked the suspension blades down.