Optical Sensors and Electromagnetic Actuators (Room Temperature)

Related subgroups: VAC, CRY, VIS

Scope

Sensors and Actuators for 6 DoF motions of the intermediate masses of vibration isolation system Type-B. This is the LIGO's OSEM-like subsystem that consists of an optical sensor and an electromagnetic actuator (OSEM).

Here, the Operating temperature is assumed to be at room temperature, not to be utilized in cryogenic temperature.

Applicable Documents

General Description

Things have been already considered a little in the vibration isolation subgroup.

Functions

• Sensing the local motions of intermediate masses of vibration isolation system Type-B.
• Actuating the local motions of intermediate masses of vibration isolation system Type-B.

Naming Conventions

TBD

Locations

• BS chamber
• ITM chambers (X,Y)
• ETM chambers (X,Y)
• PRC chambers (dummyPRC, PR2, PR3)
• SRC chambers (dummySRC, SR2, SR3)
• MC chambers (MC1, MC2...)

Requirements

• Sensor noise should be less than xxx.
• Actuator noise should be less than xxx.
• Actuator's dynamic range should be greater than xxx.
• Its size should be as compact as possible.

Characteristics

TBD

Inspection plans

TBD

Procurement process and plans

TBD

Links

• JGW-­G1100524

• L. Carbone et al., Sensors and Actuators for the Advanced LIGO Suspensions, Amaldi9 (2011)

• JGW-­G1100418