gerardo.moreno@LIGO.ORG - posted 16:46, Tuesday 05 December 2017 - last comment - 08:38, Tuesday 12 December 2017(39648)
HAM5 OFI Update
(Peter K, Gerardo M)
All dog clamps holding the OFI spacer were re-torqued, due to finding one dog clamp loose.
AOSEMs were set on brackets and positioned to be close to center (per MEDM screen), all fastening components were tighten, set screws and adjustment collar screw, to hold them in place.
Next step is to run a transfer function to determine damping.
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J. Kissel Transfer functions look great: - Suspension looks free - Resonances are in the same place as they were before - DC gain looks the same - Qs of resonances are only slightly reduced, no danger of over-damping. I'll take it! Data lives here: /ligo/svncommon/SusSVN/sus/trunk/OFIS/H1/OFI/SAGM1/Data/ 2017-12-06_0012_H1SUSOFI_M1_WhiteNoise_L_0p01to50Hz.xml 2017-12-06_0012_H1SUSOFI_M1_WhiteNoise_T_0p01to50Hz.xml 2017-12-06_0012_H1SUSOFI_M1_WhiteNoise_Y_0p01to50Hz.xml (not that it's still programmed for using OM1 as the readout chain. Eventually we'll have legit templates.)
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For the record, attached are the OSEM inputs showing the new offsets/gains for these AOSEMs.
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