KAGRA VIS Operations Manual - BS Suspension Data Reference

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

??

??

Stepper

Controller

Channel

Effect of "Left" Cmd

BF GAS

10.68.150.50

0

Keystone Up

SF GAS

10.68.150.50

1

Keystone Up

F0 GAS

10.68.150.50

2

Keystone Up

PI H1

10.68.150.51

0

IP Clockwise

PI H2

10.68.150.51

1

IP Clockwise

PI H3

10.68.150.51

2

IP Clockwise

PI Yaw

10.68.150.51

3

SF/... Clockwise

Pico Info

Pico

Controller

Channel

Colors

Effect of "+" Cmd

IM_PIT

10.68.150.16=BS_IM

1

red/white

FWD = beam up, negative pitch; 100 steps per µrad

IM_ROL

10.68.150.16=BS_IM

2

red/white

FWD = positive roll; comparable sensitivity to pitch

IM_YAW

10.68.150.16=BS_IM

3

red/white

FWD = IM clockwise, negative yaw; 6 steps per µrad

BF_1

10.68.150.17=BS_BF

1

red/white

BF_2

10.68.150.17=BS_BF

2

red/white

LVDT Info

LVDT Coil Infor

Note: As 2017-05-30, the Primary and Secondary of the PI Horizontal LVDTs are swapped relative to the table.

Type

Primary/Single/IN/1-6

Secondary/Double/OUT/2-7

Actuation/ACT/3-8

Gain Resistor

Locked Counts

Sign

GAS BF Vertical

AWG36, 187Ω, 38 mH

AWG32, 78Ω, 9.5 mH

AWG32, 110Ω, 74 mH

165.5Ω

+1

GAS SF Vertical

99.5Ω

+1

GAS F0 Vertical

98.5Ω

+1

PI Horizontal 1

250 Ω

320 Ω

155 Ω

100Ω

-1000

-1

PI Horizontal 2

100Ω

1000

+1

PI Horizontal 3

100Ω

1000

+1

OSEM Info

Location

LED V

PD V

Coil Ω

Coil Ω @Type 5

Coil Ω @Type5+3

RM

-

-

11.3

14.8

IRM

1.051

0.47

11.3

14.8

Position

Serial

klog

IM H1

27

2133

IM H2

28

2133

IM H3

29

2133

IM V1

30

2133

IM V2

31

2133

IM V3

32

2133

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??

Gas Filter Info

Test Hang

Stage

f (Hz)

klog

m (kg)

klog

k (N/m)

klog

kFR (N/m)

klog

SF

0.44

2699

Final Hang

Stage

f (Hz)

klog

m (kg)

klog

k (N/m)

klog

kFR (N/m)

klog

F0

(.208+.210)/2=0.209

3385

SF

0.425

3376

BF

(0.443+0.454)/2=0.4485

3385

GAS filter suitable positions

The beam splitter is flat, therefore the failure of putting F1 to zero is not important.

Filter

LVDT readout (µm)

klog

Notes

F0

0

F1

488

8488

The fishing rod does not pull down further than approximately 430 µm in vacuum.

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/BSData (last edited 2019-04-09 14:53:44 by MarkBarton)