Describe KAGRA/Subgroups/VIS/TypeB/PaperTODOlist here.

Introduction

The mechanical system

Sensors and actuators for control

Introductory paragraph.

OSEMs

LVDTs

Optical lever

Inertial sensors

Control and performance

Control topology

Copy and modify whatever Terrence wrote already. (Fabian.)

Performance at low frequencies

Optic residual displacement and velocity rms measured with the oplev in a day with good weather; show coherence with seismometer on ground. (Fabian)

•Describe the control system used:–Say that due to time constrains and to unidentified noise sources it wasn’tpossible to implement inertial damping.–IP: LVDT position control and damping.–F0: LVDT position control and damping.–F1: LVDT position control and damping.–BF: LVDT position control and damping.–IM OSEMs: position control from oplev and damping from the OSEMsreadout.–Oplev: position control acting on IM and damping o the mirror.