SR3 suspension information
Contents
position
FARO measurement
GAS default height (LVDT readout)
- BF GAS LVDTIN:
- F1 GAS LVDTIN:
- F0 GAS LVDTIN:
suspension parameters
resonant frequencies
position of the COM
calculated from the resonant frequencies.
sensor & actuator parameters
Oplev calibration
OSEM calibration
GAS-LVDT calibration
IP-LVDT calibration
Sensor |
Efficiency [um/cnt] |
LVDT H1 |
-0.258 |
LVDT H2 |
-0.252 |
LVDT H3 |
-0.233 |
Geophone calibration
Frequency response
Geophone's frequency response to the ground velocity:
- Ge: Generator constant [V/(m/s)]
- η: Intrinsic damping ratio
- ω0: Resonant angular frequency [rad/s]
Sensor |
S/N |
Generator constant (nominal) [V/(m/s)] |
Damping ratio (estimated) |
Resonant frequency [Hz] |
GEO H1 |
# |
|
|
|
GEO H2 |
# |
|
|
|
GEO H3 |
# |
|
|
|
Noise
Sensor |
Noise [m/rtHz] @ 0.1 Hz |
Noise [m/rtHz] @ 10 Hz |
GEO H1 |
|
|
GEO H2 |
|
|
GEO H3 |
|
|
Calibration
Converted displacement [um] = 3.052 x 10-4 [V/cnt] / HGEO(ω) / (gainPreamp) x (DC cutoff) x 1/s (m/(m/s)) x 106
actuation efficiency