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| Introductory paragraph. |
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| * --(Brief description of the anatomy of the OSEMs.)-- * Produce a nicer figure. (Fabian.) * --(Typical OSEM sensitivity measured when locking the target.)-- * --(Typical measuring range according to all the units used in BS, SR2, SR3 and SRM.)-- * Typical calibration value. (Fabian, klog 4189.) * Produce a nicer plot (Fabian). * Write the figure caption (Fabian). * Write a couple of sentences about the coil-magnet actuator and cite Mark’s document and Michimura-san’s paper. (Mark.) |
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| * --(Brief description of the oplev.)-- * --(Brief description of diagonalization procedure.)-- |
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| * Write the diameter of the beam determines the linear range of the QPD as a beam displacement sensor. * Point out that the oplev is expected to be limited by the seismic motion. * Say it is not easy to measure directly the oplev sensitivity but it is possible to set an upper limit to the optic rms displacement and velocities. |
* Write the diameter of the beam determines the linear range of the QPD as a beam displacement sensor. (Fabian.) * Point out that the oplev is expected to be limited by the seismic motion. (Fabian.) * Say it is not easy to measure directly the oplev sensitivity but it is possible to set an upper limit to the optic rms displacement and velocities. (Fabian.) |
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| === Geophones === | === Inertial sensors === * --(Brief description of what a geophone is.)-- * --(Brief explanation of the calculation of the noise determining the sensitivity.)-- * Say that below the resonant frequency the noise goes as f^-{3.5} and explain the reason. (Fabian.) * --(Briefly say how they were calibrated against a calibrated seismometer.)-- * --(Say the noise was measured using three channel correlation analysis.)-- * --(Say we are in the process of finding out the reson of discrepancy betwwen the predicted and measured sensitivity.)-- |
Describe KAGRA/Subgroups/VIS/TypeB/PaperTODOlist here.
Introduction
The mechanical system
Sensors and actuators for control
Introductory paragraph.
OSEMs
Brief description of the anatomy of the OSEMs.
- Produce a nicer figure. (Fabian.)
Typical OSEM sensitivity measured when locking the target.
Typical measuring range according to all the units used in BS, SR2, SR3 and SRM.
- Typical calibration value. (Fabian, klog 4189.)
- Produce a nicer plot (Fabian).
- Write the figure caption (Fabian).
- Write a couple of sentences about the coil-magnet actuator and cite Mark’s document and Michimura-san’s paper. (Mark.)
LVDTs
Optical lever
Brief description of the oplev.
Brief description of diagonalization procedure.
Where the displacement calibration comes from: relativeposition of components measured with ruler, dimensions given by the 3D-CAD, QPD displacement calibration and comparison with IP displacement.
Typical extent of coupling after diagonalization.
Typical measuring range.
- Write the diameter of the beam determines the linear range of the QPD as a beam displacement sensor. (Fabian.)
- Point out that the oplev is expected to be limited by the seismic motion. (Fabian.)
- Say it is not easy to measure directly the oplev sensitivity but it is possible to set an upper limit to the optic rms displacement and velocities. (Fabian.)
Inertial sensors
Brief description of what a geophone is.
Brief explanation of the calculation of the noise determining the sensitivity.
- Say that below the resonant frequency the noise goes as f^-{3.5} and explain the reason. (Fabian.)
Briefly say how they were calibrated against a calibrated seismometer.
Say the noise was measured using three channel correlation analysis.
Say we are in the process of finding out the reson of discrepancy betwwen the predicted and measured sensitivity.
Control and performance
What we have
What we aim for