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Reports until 10:38, Monday 25 November 2024
H1 SUS (SUS)
rahul.kumar@LIGO.ORG - posted 10:38, Monday 25 November 2024 - last comment - 15:53, Monday 25 November 2024(81465)
Violin modes - new settings for ETMY 01 and ITMY05/06

I have found new damping settings for ETMY mode01 and ITMY mode05/06, which are given below,

ETMY01

Nominal - FM1+FM6+FM10, Gain = +0.1 (+30deg phase)

New - FM1+FM8+FM10, Gain = +0.1 (+60deg phase)

 

ITMY 05/06

Nominal - FM5+FM6+FM7+FM10, Gain = +0.02 (-30deg phase)

New - FM5+FM6+FM8+FM10, Gain = +0.01 (+30deg phase)

I have not made any changes in the lscparam file, will check these new settings for a few lock stretches (also let microseism to settle down) before making them final.

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corey.gray@LIGO.ORG - 15:53, Monday 25 November 2024 (81475)OpsInfo, SUS

Tagging OpsInfo

So once Rahul is happy with the new Violin Mode settings for ETMy 01 & ITMy 05/06, Operators will need to enter his NEW settings by hand (this can be done any time after the DAMP_VIOLINS_FULL_POWER [566] state.  For clarity, also attaching screenshots with the filter banks in question circled in light blue:

  • ETMy 01 = ETMy MODE1
  • ITMy 05/06 = ITMy MODE5
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