Reports until 11:03, Friday 29 July 2016
H1 General
edmond.merilh@LIGO.ORG - posted 11:03, Friday 29 July 2016 - last comment - 14:44, Friday 29 July 2016(28729)
DBB Scans FAMIS# 6583

File extensions - .001= 35W path .002=200W

RPN - 35W; no changes worth mentioning.

          200W; noise is higher in the 300Hz-2k range.

FRQ - 35W; seems to hav a higher degree of error correction. Resonances that aren't noticible in recent past scans appear starting at ~7Hz/20Hz and seem to have harmonics out to ~100Hz

         200W; These same resonances mentioned above seem present in this path as well. Last weeks scan by comparison show these resonances propogating out as far as 200Hz

PNT - 35W; This looks much better than last weeks which had 2x and 2y higher than the rest by a factor of two from 1Hz-30Hz.

         200W; This weeks scan looks almost identical to last weeks scan with the outliers being 2x and 2y all the way out to 2K

MSC - 35W; HOM ct/ mode matching looks pretty good with the exception of TEM10 mode which is a bit higher than reference. Significantly better looking scan than last week.

         200W; Mode matching looks a  little sloppy. No change from last week.

Non-image files attached to this report
Comments related to this report
jason.oberling@LIGO.ORG - 14:44, Friday 29 July 2016 (28739)

Should also add that the out-of-loop PD in the ISS in iss_rpn-001.pdf (PDB in this case, the blue trace) is seeing roughly an order of magnitude more noise than the reference.  This is the 3rd time the ISS scan has been run since we resurrected the DBB after the HPO turn on, and the other scans match this one.  What is odd is is not a RPN noise increase of this magnitude in either the FE or HPO RPN scans.  Unknown at this time where the noise is coming from.