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| Purpose: To prepare a noise model of the MC and prepare an error budget for MC length fluctuations | Purpose: To prepare a noise model of the MC and prepare an error budget for MC length fluctuations |
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| Step 1. Collect the existing tools and models prepared. List of previous related work Rana, David Feldbaum, Koji Step 2. Prepare a toy model |
Step 1. Collection of existing tools and models prepared by others. List of previous related work and examples of noise models [[https://nodus.ligo.caltech.edu:30889/svn/trunk/rana/mat/mc/ | Rana's LLO MC model]] |
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| Step 3. Make a model for the MC -> PSL feed-back loop with various sources of noise | [[target|David Feldbaum]] |
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| Noise source 1. Noise source 2. .... |
[[https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/Green_Locking/Servo_modeling/091121/|Koji's ALS servo model]] |
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| Step 4. Measure the MC loop noise | Step 2. Prepare a toy model of a generic feedback loop with two noise sources as a pedagogic exercise (Wed 15th Feb) |
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| Step 5. Obtain the error budget plot. | Step 3. Make a model for the MC -> PSL feedback loop with various sources of noise (Wed 22nd Feb) |
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| Step 6. Include ASC noise from the WFS loops in the model | Step 4. Measure the MC loop noise (Wed 29th Feb) Step 5. Obtain the error budget plot. (Wed 8th March) Step 6. Include ASC noise from the WFS loops in the model (Wed 15th March) |
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Purpose:
- To prepare a noise model of the MC and prepare an error budget for MC length fluctuations
Step 1. Collection of existing tools and models prepared by others.
- List of previous related work and examples of noise models
Step 2. Prepare a toy model of a generic feedback loop with two noise sources as a pedagogic exercise (Wed 15th Feb)
Step 3. Make a model for the MC -> PSL feedback loop with various sources of noise (Wed 22nd Feb)
Step 4. Measure the MC loop noise (Wed 29th Feb)
Step 5. Obtain the error budget plot. (Wed 8th March)
Step 6. Include ASC noise from the WFS loops in the model (Wed 15th March)
Step 7 Measure ASC noise in the instrument
Step 8 Improve the ASC servo filter shape to reduce the ASC noise injected into the MC loop.