KAGRA VIS Operations Manual - SR2 Suspension Reference

Cut and Pasted from BS - Needs Checking!!!

IP Optimum Position

(Updated for SR2) See klog 7814, 8160.

Stepper Motor Info

Type

Manufacturer

Model

Color code (A1/A2//B1/B2)

Coil Ω @Motor

Coil Ω @Connector

@Flange

GAS Vertical

Arun Microelectronics (AML)

D42.2-HX

green/grey//black/white

5.5Ω

7.1Ω

9.4Ω

PI Yaw

Phytron

VSS 25.200.0.6

yellow/red//blue/green

5.2Ω

PI Horizontal

??

??

(Updated for SR2)

Stepper

Controller

Channel

Effect of "Left" Cmd

BF GAS

10.68.150.53

0

Keystone Up

SF GAS

10.68.150.53

1

Keystone Up

F0 GAS

10.68.150.53

2

Keystone Up

IP H1

10.68.150.54

0

IP Clockwise

IP H2

10.68.150.54

1

IP Clockwise

IP H3

10.68.150.54

2

IP Clockwise

F0 Y

10.68.150.54

3

SF/... Clockwise

Pico Info

(Updated for SR2)

Pico

Controller

Channel

Colors

Effect of "+" Cmd

IM_PIT

10.68.150.24=SR2_IM

1

red/white

joystick UP = HR beam down, positive pitch; klog 6137

IM_ROL

10.68.150.24=SR2_IM

2

red/white

joystick UP = HR beam left, positive roll; klog 6137

IM_YAW

10.68.150.24=SR2_IM

3

red/white

joystick UP = IM clockwise, negative yaw; klog 6137

BF_1

10.68.150.25=SR2_BF

1

red/white

BF_2

10.68.150.25=SR2_BF

2

red/white

LVDT Info

LVDT Coil Info

Measured

Type

Primary/Single/IN/1-6

Secondary/Double/OUT/2-7

Actuation/ACT/3-8

Reference

GAS Vertical

117.4 Ω

??75.4, 102.5 Ω

214.0 Ω

2018-06-26

PI Horizontal 1/3

56.6 Ω

118.4 Ω

131.2 Ω

2018-06-28

PI Horizontal 2/3

55.5 Ω

121.5 Ω

129.6 Ω

2018-06-28

PI Horizontal 3/3

55.4 Ω

122.9 Ω

129.8 Ω

2018-06-28

LVDT Coil Info SEPTEMBER

Measured

Type

Primary/Single/IN/1-6

Secondary/Double/OUT/2-7

Actuation/ACT/3-8

Reference

PI Horizontal 1/3

130.3 Ω

62.6 Ω

137.2 Ω

2018-09-03

PI Horizontal 2/3

125.9 Ω

63.7 Ω

138.2 Ω

2018-09-03

PI Horizontal 3/3

129.1 Ω

62.8 Ω

136.9 Ω

2018-09-03

LVDT Driver Data

LVDT Driver S.N.

Left card

Stage

Resistor value [ohm]

Reference Signal

Gain

Right card

Stage

Resistor value [ohm]

Reference Signal

Gain

SR2: SN 7777777

R0

BF GAS

59.2

4. Vpp

4./5.02 = 0.

R0

PI LVDT#1

50.1

4. Vpp

4./5.02 = 0.

R1

SF GAS

36.3

4. Vpp

4./5.02 = 0.

R1

PI LVDT#2

50.6

4. Vpp

4./5.02 = 0.

R2

F0 GAS

59.6

4. Vpp

4./5.02 = 0.

R2

PI LVDT#3

51.2

4. Vpp

4./5.02 = 0.

R3

Not used

59.5

4. Vpp

4./5.02 = 0.

R3

Not used

50.0

4. Vpp

4./5.02 = 0.

LVDT Calibration Info

Actual SR2 Data (not BS).

LVDT

Slope (cts/µm)

Gain (µm/ct

Nominal (cts)

BF GAS

6.262

0.1600

-3425

SF GAS

-

-

-

PI GAS

-

-

-

PI H0

-

-

-

BF H1

-

-

-

OSEM Info

Location

LED V

PD V

Coil Ω

Coil Ω @Type 5

Coil Ω @SatAmp

Coil Ω @Rack

Notes

TM Nom

-

-

11.3

14.8

H1

-

-

-

-

20.8

26.5

klog 6182, 6255

H2

-

-

-

-

22.5

28.3

klog 6182, 6255

H3

-

-

-

-

24.9

30.7

klog 6182, 6255

H4

-

-

-

-

21.1

26.5

klog 6182, 6255

IM

1.051

0.47

11.3

14.8

Magnet Info

Location

Size (mm)

Number

Material

BS (Old)

3xØ6

4

NdFeB

BS (New)

3xØ2

4

SmCo

IM

10xØ10

2x6

NdFeB??

SR Damper

10x10x12

72

NdFeB??

LBB Damper

10x10x12

48

NdFeB??

Filter Info

Stage

f (Hz)

klog

m (kg)

klog

k (N/m)

klog

kFR (N/m)

klog

F0

0.5025

5688

252.8

4371

SF

0.27 (cap off); 0.235 (poor cap)

4405;4401,

162.9+0.8=163.7

4266

BF

0.461

4401

53.1-1.048=52.1

3971, 4002

GAS filters suitable positions

Filter

LVDT readout (µm)

klog

Notes

F0

-1100

7980

F1

0

BF

0

We require the IM-V OSEM flags to be at the correct position.

Optimum Temperature

See klog 7420.

KAGRA/Subgroups/VIS/OpsManual/TypeB/SR2Data (last edited 2019-04-09 15:22:58 by MarkBarton)