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Environmental Monitoring (Environmental Monitoring)
calloni, gennai, errico - 20:09 Sunday 30 June 2019 (46237) Print this report
Tiltmeter locked on Interferometer since Tuesday - calibration - low frequency sensitivity
The Tiltmeter is locked on the interferometer since last Tuesday. The control loop and the gain still must be regulated but since everything is stable and the behavior at Newtonian Noise frequencies is not affected by this choice all has been left like that. The unity gain is around 0.1 - 0.2 Hz. The signal is ENV_NE_tiltITF1 and it calibrated in microrad.
In low frequency, in the region 10-100mHz the actuation noise is decreasing with time. This is consistent with being presently limited by actuation noise because the DC correction is as well slowly and uniformly decreasing with time. At the moment the voltage applied to Electrostatic actuator is 230 V. In figure two curves taken today and two days before. At this rate the DC correction can let decrease without any intervention for few more days until it will reach the interesting zone of few tens of Volts.
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Comments to this report:
calloni - 12:27 Sunday 14 July 2019 (46360) Print this report
The tiltmeter is locked on ITF since Tuesday June 23rd (around 12 LT) so the signal can be used for any analysis starting from this date.
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