We computed a first version of the filter for the ALS control loop with two actuators. We first set up the architecture for implementing this change, by modifying:

• ALS_NEB_fast: we sent the switch of the green lock to LSC
• ALS_WEB_fast: we sent the switch of the green lock to LSC
• LSC_Acl: we implemented a standard lock algorithm, which depends on a manual switch and on the green lock trigger

We then searched for the good calibration for the both filters in order to have a crossing point which makes the system stable.

We prepared a small script in python to test this loop, but we haven't finished debugging it yet. We will continue investigating on this filter in tomorrow shift.