corey.gray@LIGO.ORG - posted 08:06, Friday 21 February 2025 - last comment - 10:01, Friday 21 February 2025(82953)
ITMy Mode 05 & 06
Now that I have seen in alogs () that ITMy Mode 5 & 6 have returned to causing grief, doing a morning check after 2hrs of lock. Currently, ITMy Mode 05 was taken to the following via guardian:
- ITMy Mode 05 settings via Guardian: FM5 + FM6 + FM10 Gain -0.01 (phase -60 degrees)
- This is in contrast to the settings Rahul notes in his alog yesterday: FM5 + FM6 + FM10 Gain 0.01 (phase -60 degrees)
- The attached screenshot shows IY Mode-5 slightly decreasing and Mode-6 slightly increasing
Will continue monitoring.
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Since IY06 was growing consistently, hence I have switched off damping for some time and will look for another setting.
I tried the following settings this morning and none of them worked,
-60 deg phase gain -0.01 (IY05 decreasing, IY06 increasing)
-30 deg phase gain -0.01 (IY05 increasing, IY06 increasing)
+30 deg phase gain -0.01 (IY05 increasing, IY06 increasing)