Differences between revisions 19 and 20

Optical Lever (Room Temperature)

Related subgroups: VIS, IOO, MIF, VAC, CRY...

Contents

Optical Lever (Room Temperature)

Scope

Sensing local motions including longitudinal dof and all alignment dofs (pitch, yaw and roll) of any mirrors supported by vibration isolation system.

Note on the operating temperature: here the system is assumed to be utilized at room temperature, not in cryogenic temperature.

Applicable Documents

TBD; just see the links below.

General Description

Naming Conventions

TBD

Locations

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

Requirements

Sensor noise should be less than xxx.
Sensor's dynamic range should be greater than xxx.
At least horizontal degrees of freedom (X,Y)
Preferably a vertical sensor (Z) and side
The sensors have to be rigidly mounted on the ground so that these are useful for remembering the position of the mirror and recording the drifts.

Characteristics

Each optical lever consists of the following parts: a light source, optical fibers, a focusing telescope, viewport windows, a detector, and pylons which support the focusing telescope and the detector.

Light source

For the light source, suggested candidates are

superluminous LED (SLED) or
laser light source as LIGO.

Optical Fibers

Optical fibers

Focusing Telescopes

Inspection plans

TBD

Procurement process and plans

TBD

Links

Some of the LIGO documents listed below are NOT public; to access them, you may need your own LSC account.

-  ⇤ ← Revision 19 as of 2011-10-07 18:02:34 → 
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+   ← Revision 20 as of 2011-10-07 18:03:26 → ⇥
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  Editor: TomotadaAkutsu
  Comment:
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-Each optical lever consists of five parts: a light source, optical fibers, a focusing telescope, viewport windows, a detector, and pylons which support the focusing telescope and the detector.
+Each optical lever consists of the following parts: a light source, optical fibers, a focusing telescope, viewport windows, a detector, and pylons which support the focusing telescope and the detector.