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||'''Sensor'''||'''Efficiency [um/cnt]'''||
|| F0-LVDT ||<)> ||
|| F2-LVDT ||<)> ||
|| F3-LVDT ||<)> ||
/* {{attachment:calibLVDT_ETMX_IPH1_20171012.png||width=33%,align="left"}} */
/* {{attachment:calibLVDT_ETMX_IPH2_20171012.png||width=33%,align="center"}} */
/* {{attachment:calibLVDT_ETMX_IPH3_20171012.png||width=33%,align="right"}} */

SR3 suspension information


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

Sensor

Efficiency [um/cnt]

F0-LVDT

F2-LVDT

F3-LVDT

IP-LVDT calibration

Sensor

Efficiency [um/cnt]

LVDT H1

LVDT H2

LVDT H3

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 polarization

TM-stage

COIL

sign

H1

H2

H3

H4

IM-stage

COIL

sign

H1

H2

H3

V1

V2

V3

IP-stage

COIL

sign

H1

H2

H3

Diagonalization matrix

  • ACC2EUL

H1

H2

H3

To:

**

**

**

  • LVDT2EUL

H1

H2

H3

To:

Long.

Trans.

Yaw

  • EUL2COIL

Long.

Trans.

Yaw

To:

H1

H2

H3

actuation efficiency

Stepper motor

See also: Stepper motor setup

Epics channel name: K1:STEPPER_***_IP

Driver IP address: 10.68.150.**

Motor 0

Motor 1

Motor 2

Motor 3

Motor 4

Motor 5

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Related Link

KAGRA/Subgroups/VIS/TypeB/SR3detail (last edited 2022-03-08 13:37:26 by hiromi.yasui)