40m QIL Cryo_Lab CTN SUS_Lab CAML OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  ATF eLog  Not logged in ELOG logo
Message ID: 1164     Entry time: Thu Nov 11 23:53:12 2010
Author: Zach 
Type: Laser 
Category: GYRO 
Subject: TO DO 

 This is a list of what needs to be done next.

  1. Understand and fix error signal offset problem
  2. New OLTFs
  3. Obtain new cavity responses (in V/Hz) with PDA255s using (2) and known actuation/PDH gains
  4. Characterize notch filter to extend loop characterization and electronics noise influence beyond 10 kHz
  5. Produce current noise budget (including new electronics noise info) and gyro noise spectrum, update SVN
  6. PDA255 characterization
    1. Measure noise directly (RF analyzer)
    2. Compare with spec and expected noise from circuit
  7. Modify PDH box(es)
    1. Reduce gain range in order to increase gyro optical power and utilize maximum optical gain without instability
    2. Replace OP27s with faster op amps to improve UGF phase margin
  8. Repeat (2-5)

In parallel:

  • Finalize CDS setup and procedures
  • Write MATLAB code to automate gyro spectrum generation (make it plot this along with current NB)
  • Investigate servo noise level
    • Is it too high to benefit from better RFPDs? If so, make sure that custom design is not (actually, do that either way...)
  • Altium: RFPDs and custom servos
  • Fancy stuff:
    • Remote/automatic BOOST/slow loop control
    • Autolock script
ELOG V3.1.3-