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Reports until 10:30, Wednesday 17 December 2025
X1 SUS
ryan.crouch@LIGO.ORG - posted 10:30, Wednesday 17 December 2025 - last comment - 10:59, Wednesday 17 December 2025(88569)
JM3 transfer function results

After taking the first tranfer function, we saw Length look weird, so we measured the wire lengths then replaced one of the wires and remeasured JM3. Before replacing the wire, and after replacing the wire. The wire replacement made everything look nicer, shifted the peaks into a more correct location. While it is still not perfect and looks a little different, we should be able to damp it, the magnitude differences are likely from the coil drivers. 

The measurements are located in: /ligo/svncommon/SusSVN/sus/trunk/HTTS/X1/JM3/SAGM1/Data/

After replacing the wire:
2025-12-11_2300_X1SUSJM3_M1_WhiteNoise_L_0p02to50Hz.xml
2025-12-11_2300_X1SUSJM3_M1_WhiteNoise_P_0p02to50Hz.xml
2025-12-11_2300_X1SUSJM3_M1_WhiteNoise_Y_0p02to50Hz.xml

Before replacing the wire:

2025-12-11_2000_X1SUSJM3_M1_WhiteNoise_L_0p02to50Hz.xml
2025-12-11_2000_X1SUSJM3_M1_WhiteNoise_P_0p02to50Hz.xml
2025-12-11_2000_X1SUSJM3_M1_WhiteNoise_Y_0p02to50Hz.xml

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ryan.crouch@LIGO.ORG - 10:59, Wednesday 17 December 2025 (88572)

Comparing JM3 to some previous TT measurements for OM3, PM1, and RM2.

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