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Entry  Wed Sep 18 15:27:45 2019, gautam, Update, IOO, TT cables need to be remade IMG_7945.JPG
    Reply  Thu Sep 19 09:39:30 2019, gautam, Update, IOO, TT cables need to be remade CDSoverview.png
    Reply  Thu Sep 19 11:26:18 2019, gautam, Update, IOO, TT cables DON'T need to be remade 
Message ID: 14897     Entry time: Wed Sep 18 15:27:45 2019     Reply to this: 14898   14899
Author: gautam 
Type: Update 
Category: IOO 
Subject: TT cables need to be remade 


The custom ribbon cables piping the coil driver board outputs to the eLIGO (?) TTs (a.k.a. TT1 and TT2) are damaged. They need to be re-made. I can't find any pin-mapping for them.


While waiting for the LSC photodiode whitening switching cross-connect work to be done, I thought I'd re-align the IFO a bit. However, I was unable to find any beam making it to the REFL/AS ports despite some TT steering. I remembered that Chub had undone the TT connections at 1Y2 as well, and thought I'd check the cabling to make sure all was in order. On going to the rack, however, I found that these connections were damaged at the coil-driver end (see Attachment #1), presumably during the cable extraction. These need to be re-made...😔 

Attachment 1: IMG_7945.JPG  1.808 MB  Uploaded Wed Sep 18 16:32:32 2019  | Show | Show all
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