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Reports until 16:00, Saturday 08 July 2017
H1 General
edmond.merilh@LIGO.ORG - posted 16:00, Saturday 08 July 2017 (37384)
Shift Summary - Day

 

TITLE: 07/08 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Earthquake
INCOMING OPERATOR: Travis
SHIFT SUMMARY:

LOG:

18:15 switched BP filters on IY mode9 filter. FM8 turned off and FM10 turned on to attempt damping at 997.719Hz

18:34 Increased the gain from 10 to 15

19:30 after a while at a gain of 20 i decided that I wasn't affecting anything so I put everything back to original state I found it in.

20:00 Two tour groups into the control room.

20:15 decided to try the same freq again. After further reading I decided to try higher gains while monitoring DAC outputs.

20:20 up to 200 Gain going to try switching phase sign from - to + (60).

20:50 flipped sine back and am trying a more aggressive damping of the ETMX 505.805Hz fundamental (mode4). I saw immediate results in the f2! Gonna try some more gain. I still have headroom in the DAC.

21:37 Significant damping on the 997.719 mode. got a little upturn on the range to almost 53Mpc

21:46 putting the hammer down on the ETMX mode 4 some more. Original gain was -55.988 - now up to -200.98...eventually up to -400.98

21:57 1478.66Hz seems to be the largest f3 offender. I don't think it has a filter

 

 

 

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