R&D (FilterCavity)
MarcEisenmann - 10:30, Monday 06 February 2023 (3162)
MZ and GRMC lock

[Marc, Shalika]

We followed the wiki procedure to relock MZ and GRMC.

First, we tuned the HPD bias to minimize the MZ reflection.

In this configuration we now have MZ incident power 200 mW, reflected power 8mW and transmitted power 180 mW (MZ offset is 4.2V).

We locked the GRMC and measurement transmitted power 105mW.

Then, we had to reduce the gain of both MZ and GRMC servo to 2 to lock the 2 cavities).