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{{attachment:IPconfig_ITMXv2.png}}

=== Geophone (GEO) ===

 * Measurements for characterization >>> /*[[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3893|klog #3893]]*/		 {{attachment:KAGRA/Subgroups/VIS/TypeA/ETMX/IPconfig_ETMXv2.png}}

=== Accelerometer (ACC) ===
Geophone (GEO) is to be replaced by ACC in ITMX and ITMY.
## * Measurements for characterization >>> /*[[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3893|klog #3893]]*/
Line 16: Line 16:
/*{{attachment:texclip20171227223533.png||width=350}}*/

 * 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 || # || || ||   ||		 ## {{attachment:KAGRA/Subgroups/VIS/TypeA/ETMX/texclip20171227223533.png||width=350}}

## * Ge: Generator constant [V/(m/s)]
## * η: Intrinsic damping ratio
## * ω0: Resonant angular frequency [rad/s]

||'''Sensor'''||'''S/N'''||'''Quality factor'''||'''Resonant frequency [Hz]'''||
|| ACC H1 || # || || ||
|| ACC H2 || # || || ||
|| ACC H3 || # || || ||
Line 31: Line 31:
|| GEO H1 || || ||
|| GEO H2 || || ||
|| GEO H3 || || ||		 || ACC H1 || || ||
|| ACC H2 || || ||
|| ACC H3 || || ||
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 * ACC2EUL  * LVDT2EUL (updated on 2018-May-3)
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|| || || ||''Long.''||
|| || || ||''Trans.''||
|| || || ||''Yaw'' ||

 * LVDT2EUL		 || 0.6666 || -0.3333 || -0.3333 ||''Long.'' ||
|| 0 || -0.5774 || 0.5774 ||''Trans.''||
|| 0.56111 || 0.56111 || 0.56111 ||''Yaw''  ||


 * ACC2EUL (updated on 2018-May-3)
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|| ||   ||   ||''Long.''||
|| || ||   ||''Trans.''||
|| || ||   ||''Yaw'' ||

 * EUL2COIL		 || 0.64400 || -0.17250 || -0.4714 ||''Long.''||
|| 0.17250 || -0.6440 || 0.47140 ||''Trans.''||
|| 0.56348 || 0.56348 || 0.56348 ||''Yaw'' ||


 * EUL2COIL (updated on 2018-May-3)
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|| ||       || ||''H1''||
|| || || ||''H2''||
|| || || ||''H3''||		 ||  0.5 || 0 || 0.594 ||''H1''||
|| -0.25 || -0.5 || 0.594 ||''H2''||
|| -0.25 || 0.5 || 0.594 ||''H3''||
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'''(To be updated)'''
{{attachment:BFconfig_ETMXv2.png}}:?		 {{attachment:KAGRA/Subgroups/VIS/TypeA/ETMX/BFconfig_ETMXv2.png}}
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|| LVDT V1 ||<)> ||
|| LVDT V2 ||<)> ||		 || LVDT V1 ||<)> -0.3538 ||
|| LVDT V2 ||<)> -0.3665 ||
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/* {{attachment:calibLVDT_ETMX_BFV1_20170802.png||width=33%,align="left"}}
/* {{attachment:calibLVDT_ETMX_BFV2_20170802.png||width=33%,align="center"}} */		 {{attachment:IX-BFLVDT-calibration_V1.png||width=33%,align="left"}}
{{attachment:IX-BFLVDT-calibration_V2.png||width=33%,align="center"}}
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''See also:'' [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/DGS/Projects/PicoMotor|Picomotor digital setup]] ''See also:'' [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/DGS/Projects/PicoMotor|Picomotor digital setup]]  

'''(To be updated)'''

Type-A Tower ITMX Specification

Contents

  1. Type-A Tower ITMX Specification
    1. IP
      1. Accelerometer (ACC)
      2. LVDT
      3. Actuator polarization
      4. Diagonalization matrix
      5. Stepper motor
    2. GAS
      1. LVDT
      2. Fishing Rod (stepper motor)
    3. BF
      1. LVDT (BF Damper)
      2. Actuator polarization
      3. Diagonalization matrix
      4. Picomotor

IP

KAGRA/Subgroups/VIS/TypeA/ETMX/IPconfig_ETMXv2.png

Accelerometer (ACC)

Geophone (GEO) is to be replaced by ACC in ITMX and ITMY.

Frequency response

Geophone's frequency response to the ground velocity:

Sensor

S/N

Quality factor

Resonant frequency [Hz]

ACC H1

#

ACC H2

#

ACC H3

#

Noise

Sensor

Noise [m/rtHz] @ 0.1 Hz

Noise [m/rtHz] @ 10 Hz

ACC H1

ACC H2

ACC 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

LVDT

Sensor

Efficiency [um/cnt]

LVDT H1

LVDT H2

LVDT H3

Actuator polarization

Polarity is determined so that an +offset at the COILOUTF applies +yaw force in each actuator.

  • COIL H1:
  • COIL H2:
  • COIL H3:

Diagonalization matrix

  • LVDT2EUL (updated on 2018-May-3)

H1

H2

H3

To:

0.6666

-0.3333

-0.3333

Long.

0

-0.5774

0.5774

Trans.

0.56111

0.56111

0.56111

Yaw

  • ACC2EUL (updated on 2018-May-3)

H1

H2

H3

To:

0.64400

-0.17250

-0.4714

Long.

0.17250

-0.6440

0.47140

Trans.

0.56348

0.56348

0.56348

Yaw

  • EUL2COIL (updated on 2018-May-3)

Long.

Trans.

Yaw

To:

0.5

0

0.594

H1

-0.25

-0.5

0.594

H2

-0.25

0.5

0.594

H3

Stepper motor

See also: Stepper motor setup

Epics channel name: K1:STEPPER_IXV_***

Driver IP address: 10.68.150.**

Motor 0

Motor 1

Motor 2

Motor 3

Motor 4

Motor 5

<blank>

<blank>

GAS

LVDT

Sensor

Efficiency [um/cnt]

F0 LVDT GAS

F1 LVDT GAS

F2 LVDT GAS

F3 LVDT GAS

BF LVDT GAS

/* */ /* */

/* */ /**/

Fishing Rod (stepper motor)

See also: Stepper motor setup

Motor driver

(To be updated)

Epics channel name: K1:STEPPER_EXV_GAS

Driver IP address: 10.68.150.45

Motor 0

Motor 1

Motor 2

Motor 3

Motor 4

Motor 5

F0 GAS?

F1 GAS?

<blank>

F3 GAS?

BF GAS?

F2 GAS?

Property

(To be updated)

F0 GAS

F1 GAS

F2 GAS

F3 GAS

BF GAS

Movable range

mm (± mm)

(TBC)

(TBC)

(TBC)

full range (± 5.5 mm)

+step direction

down

down

down

down

down

BF

KAGRA/Subgroups/VIS/TypeA/ETMX/BFconfig_ETMXv2.png

LVDT (BF Damper)

Sensor

Efficiency [um/cnt]

LVDT V1

-0.3538

LVDT V2

-0.3665

LVDT V3

LVDT H1

LVDT H2

LVDT H3

Note: The polarities are determined to output positive signals when the BF shifts respectively to +vertical/+yaw direction for Vertical/Horizontal LVDTs.

IX-BFLVDT-calibration_V1.png IX-BFLVDT-calibration_V2.png

Actuator polarization

Polarity is determined so that an +offset at the COILOUTF applies +yaw force in each actuator.

  • COIL V1:
  • COIL V2:
  • COIL V3:
  • COIL H1:
  • COIL H2:
  • COIL H3:

Note: Polarity may change when connecting the secondary coil to the cable. This configuration is confirmed on [2017.10.27]

Diagonalization matrix

  • LVDT2EUL (To be updated)

V1

V2

V3

H1

H2

H3

To:

0

0

0

-0.6667

0.3333

0.3333

Long.

0

0

0

0

0.5774

-0.5774

Trans.

0.3333

0.3333

0.3333

0

0

0

Vert.

0.9158

0.9158

-1.8315

0

0

0

Roll

1.5861

-1.5861

0

0

0

0

Pitch

0

0

0

0.8170

0.8170

0.8170

Yaw

  • EUL2COIL (To be updated)

L

T

V

R

P

Y

To:

0

0

1.

0.1820

0.3152

0

V1

0

0

1.

0.1820

-0.3152

0

V2

0

0

1.

-0.3640

0

0

V3

-1

0

0

0

0

0.4080

H1

0.5

0.8660

0

0

0

0.4080

H2

0.5

-0.8660

0

0

0

0.4080

H3

Picomotor

See also: Picomotor digital setup

(To be updated)

Epics channel name: K1:PICO_ITMX

Driver IP address: 10.68.150.**

CH1

CH2

CH3

BF moving mass A

BF moving mass B

Payload yaw

  • BF moving masses (both A and B ) are currently disabled because of weight limit for upper GAS stages

KAGRA/Subgroups/VIS/TypeA/ITMX (last edited 2022-03-07 12:56:36 by hiromi.yasui)