I'd like to get a concrete list of measurements written down, so that it's clear what needs to be done before I graduate.
Noise couplings:
- Laser amplitude noise coupling to DARM
- We don't have an AOM for ISS right now, but we should be able to just stick it back in the beam path, right? I think Koji checked that the AOM was all okey-dokey recently.
- AOM calibration should tell me how much the single-pass amplitude changes as a function of input signal.
- Laser frequency noise coupling to DARM
- Inject signal at the CM board input, which should be calibrated by looking at response to calibrated MC2 motion.
- Marconi phase noise coupling to DARM
- Marconi can produce internally or accept via BNC 0-10 rad of phase modulation. Marconi spec sheet should give me rad/V for the input calibration.
- Marconi amplitude noise coupling to DARM
- Using external input of Marconi. Marconi spec sheet should give me input calibration.
- MICH err to DARM
- Compare with Optickle model
- PRCL err to DARM
- Compare with Optickle model
Noise cancellation:
- PRC angle
- MICH noise removed from DARM (compare flat gain FF vs. Wiener FF)
- PRCL noise removed from DARM (compare FF shape from model vs. Wiener FF)
- MC length noise (equiv. to laser freq noise) removed from CARM & DARM
Are there things that I'm missing? I've never had an IFO to characterize before. |