Benefits of SPI
Here is a list of the benefits of SPI.
Inside ( ) are alternative techniques.
Reduction of the RMS motion of the mirrors
- Easier lock acquisition (Pre-locking of the arms)
- Stabler operation (Hierarchical control)
- Less up conversion noise (Hierarchical control)
- Less laser noise coupling (Hierarchical control)
- Less actuator noise (Hierarchical control)
Reduction of the seismic noise
- Low frequency seismic noise
- Vibration introduced from the heat link (Better heatlink isolation. Local SPI.)