Yesterday the actuation of NI TM has been turned in High Power for a couple of minutes, while the ITF was in LN3. It has been done for two coils:

UL: gps 1439660088, 150s

UR: gps 1439660858, 100s

Fig 1 shows the noise injected by the drivers in the two cases, compared to clean data. One can extract a measurement of the DAC voltage noise, given that the mechanical response of the actuator in m/V is known. Fig 2 shows the result, compared to a model of DAC noise; the accordance is not bad.