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Size: 1996
Comment:
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Size: 1997
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 15: | Line 15: |
| . attachment:red.png fix a clipped beam | . attachment:green.png fix a clipped beam |
| Line 37: | Line 37: |
| . attachment:orange.png recheck the ADCs | . attachment:green.png recheck the ADCs |
goals in this month
- Do something by using green beat note
- Prepare digital systems
to do list
attachment:green.png complete |
attachment:orange.png intermediate state |
attachment:red.png nothing happened |
attachment:black.png gave up |
in-vac work
- attachment:orange.png final alignment
- attachment:green.png fix a clipped beam
optics
- attachment:green.png check the fiber
- attachment:orange.png preparation for the 1064nm beat note
- attachment:orange.png find out the cause of a 20dB missing factor in the beat note detection
work on some electronics
- attachment:orange.png noise characterization of the RFPD
- attachment:green.png VCO check
- attachment:orange.png noise characterization of the VCO
- attachment:red.png preparation for power line for the PFPDs and VCOs
digital system
attachment:green.png prepare the front end machine c1iscex
- attachment:orange.png run the realtime code on a Gentoo
- attachment:green.png RFM
- attachment:green.png recheck the ADCs
- attachment:orange.png digitally slow feedback to the laser temperature
misc.
- attachment:orange.png power budget
- attachment:red.png re-check the mode matching of the beam going to the cavity
- attachment:red.png 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