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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 [[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]] Step 2. Prepare a toy model of a feedback loop with two noise sources Step 3. Make a model for the MC -> PSL feedback loop with various sources of noise |
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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
Step 2. Prepare a toy model of a feedback loop with two noise sources
Step 3. Make a model for the MC -> PSL feedback loop with various sources of noise
Step 4. Measure the MC loop noise
Step 5. Obtain the error budget plot.
Step 6. Include ASC noise from the WFS loops in the model
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.