• KAGRA
• Subgroups
• VIS
• Type-A
• Commissioning
• Tasks

Type-A Commissioning Tasks

Model

• Mechanical model : SUMCOM
• Electronics model and control loop model can be implemented in the Noise Budget tool

• Existing suspension NB model

• Implement a standalone NB model for Type-A first
• Then integrate it into the IFO NB model

Sensor / actuator diagonalization

• Tower part is on going (a fair bit done already)
• CRY part will start from now
• VIS experts should join the work to expedite it

TF measurements

• Check the mechanical status of the suspension
• Base for the control
• Comparison against the model predictions

Damping control

• Except for ITMY, inertial damping is going to be completed
• Integrated work with CRY and VIS is necessary
• Modal damping for GAS (later ?)

Hierarchical control

• Procedure
  • Measure TFs from various stages to TM
  • Design blending filters to combine them
  • Iteration
  • Establishing a good suspension model is necessary in the filter design process
    • Inject seismic noise to make sure that no actuator saturate

Automatic operation

• Guardian
  • Currently fairly incomplete
  • We can get help from the Type-B team (Mark and Terrence)
• Automatic health check
• Status monitor