goals in this month
- Do something by using green beat note
- Prepare digital systems
to do list
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gave up
in-vac work
final alignment - fix a clipped beam
optics
- check the fiber
- preparation for the 1064nm beat note
find out the cause of a 20dB missing factor in the beat note detection
work on some electronics
- noise characterization of the RFPD
- VCO check
- noise characterization of the VCO
preparation for power line for the PFPDs and VCOs
digital system
- prepare the front end machine c1iscex
- run the realtime code on a Gentoo
- RFM
- recheck the ADCs
- digitally slow feedback to the laser temperature
misc.
- power budget
- re-check the mode matching of the beam going to the cavity
- renew some old diagrams
considerations
How to add an offset to the PLL
How to do it ?
- How many channels ?
What kind of digital control do we need ?
- Using epics slow channels ?
- Using a realtime control ?
What kind of analog circuit do we need ?
- Anti Aliasing ?
- Dewhitening ?
Noise requirements for pre-arm stabilization
what is the actuation coefficient of the ETM OSEMs
Noise budget