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AdV-ISC (Lock acquisition: auxiliary lasers)
boldrini, pinto, casanueva, mantovani, bersanetti, valentini - 16:18 Wednesday 13 January 2021 (50433) Print this report
ALS locking: test of the first version of the filter for the laser frequency actuator and the mirrors

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.

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