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 . ''''' Do something by using green beat note'''''  . '''''  - Do something by using green beat note'''''
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 . ''''' Prepare digital systems '''''  . '''''  - Prepare digital systems '''''
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[[BR]]
 . ''' optics '''
   . attachment:orange.png check the fiber
   . attachment:red.png preparation for the 1064nm beat note
   
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   . attachment:orange.png VCO
   		    . attachment:orange.png VCO check
   . attachment:red.png noise characterization of the VCO
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   . attachment:green.png make a simulated plant
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    . attachment:green.png have a prediction what we will see at the vertex
    . attachment:orange.png make the wiki page better and more user friendly
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== 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 '''

goals in this month

  • - Do something by using green beat note

  • - Prepare digital systems

BR

to do list

attachment:green.png complete

attachment:orange.png intermediate state

attachment:red.png nothing happened

attachment:black.png gave up

BR

  • in-vac work

    • attachment:orange.png final alignment
    • attachment:red.png fix a clipped beam

BR

  • optics

    • attachment:orange.png check the fiber
    • attachment:red.png preparation for the 1064nm beat note

BR

  • work on some electronics

    • attachment:red.png noise characterization of the RFPD
    • attachment:orange.png figure out 20dB missing factor in the beat note detection
    • attachment:orange.png VCO check
    • attachment:red.png noise characterization of the VCO

BR

  • digital system

    • attachment:orange.png prepare the front end machine  c1iscex 

    • attachment:red.png run the realtime code on a Gentoo
    • attachment:orange.png RFM
    • attachment:red.png recheck the ADCs
    • attachment:red.png digitally slow feedback to the laser temperature

BR

  • 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

BR

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

Advanced_Techniques/Green_Locking/November_2010 (last edited 2012-01-03 23:02:37 by localhost)