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## page was renamed from Upgrade 09/GreenLock/October 2010

goals in this month

  • - get a green beam coming from the chamber to the PSL table

  • - do a science at the PSL table

  • - develop a simlink model for simulated plant

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:green.png align the beam axis at the end station
    • attachment:green.png open the heavy doors
    • attachment:green.png take the access connector out
    • attachment:green.png install the last periscope and steering mirrors
    • attachment:orange.png final alignment including 1064 optics

BR

  • work at the PSL table

    • attachment:green.png put a 90/10 beam splitter after the PMC
    • attachment:green.png rearrange the doubling crystal

    • attachment:green.png mode match to the doubling crystal --> it has s-polarization

    • attachment:green.png check the polarization of the crystal
    • attachment:green.png make the hole wider on the wall of the PSL booth
    • attachment:green.png place Hartmut's RFPD
    • attachment:orange.png characterization of the RFPD
    • attachment:green.png find beat note by sweeping the end laser's temperature

BR

  • digital system

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

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

BR

  • misc.

    • attachment:green.png re-check the items
    • attachment:orange.png re-check the mode matching of the beam going to the cavity
    • 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
    • attachment:red.png renew some old diagrams
    • attachment:green.png buy DC blocks from mini circuit

BR

considerations

what is the polarization of the doubling crystal

The one sitting on the PSL table has S-polarization apparently. Since the beam coming from PMC is P-polarizing we had to put a lamda/2 wave plate.

Advanced_Techniques/Green_Locking/October_2010 (last edited 2012-01-03 23:02:40 by localhost)