KAGRA VIS Operations Manual - SR3 Suspension Reference
Stepper Motor Info
Type |
Manufacturer |
Model |
Coil resistance |
Color code (A1/A2//B1/B2) |
|
GAS Vertical |
Arun Microelectronics (AML) |
D42.2-HX |
5.5Ω |
green/grey//black/white |
|
PI Yaw |
Phytron |
VSS 25.200.0.6 |
5.2Ω |
yellow/red//blue/green |
|
PI Horizontal |
?? |
?? |
7Ω |
|
Stepper |
Controller |
Channel |
"Left" |
BF GAS |
0 |
Up |
|
SF GAS |
1 |
Up |
|
F0 GAS |
2 |
Up |
|
PI H0 |
0 |
?? |
|
PI H1 |
1 |
?? |
|
PI H2 |
2 |
?? |
|
PI Yaw |
3 |
Clockwise |
Pico Info
Pico |
Controller |
Channel |
Colors |
|
IM_PIT |
10.68.150.26=SR3_IM |
1 |
red/white |
Joystick Up = +pitch |
IM_ROL |
10.68.150.26=SR3_IM |
2 |
red/white |
|
IM_YAW |
10.68.150.26=SR3_IM |
3 |
red/white |
|
BF_1 |
10.68.150.27=SR3_BF |
1 |
red/white |
|
BF_2 |
10.68.150.27=SR3_BF |
2 |
red/white |
|
LVDT Info
LVDT Coil Info
Copied from BS - check!
Type |
Primary/Single/IN/1-6 |
Secondary/Double/OUT/2-7 |
Actuation/ACT/3-8 |
GAS Vertical |
AWG36, 187Ω, 38 mH |
AWG32, 78Ω, 9.5 mH |
AWG32, 110Ω, 74 mH |
PI Horizontal |
250 Ω |
320 Ω |
155 Ω |
Measured
Type |
Primary/Single/IN/1-6 |
Secondary/Double/OUT/2-7 |
Actuation/ACT/3-8 |
Reference |
GAS Vertical |
111.3 Ω |
131.2 Ω |
208.4 Ω |
2018-06-26 |
PI Horizontal 1/3 |
55.4 Ω |
122.5 Ω |
130.3 Ω |
2018-06-28 |
PI Horizontal 2/3 |
53.3 Ω |
120.4 Ω |
134.2 Ω |
2018-06-28 |
PI Horizontal 3/3 |
54.0 Ω |
120.9 Ω |
133.3 Ω |
2018-06-28 |
LVDT Driver Info
LVDT Driver S.N. |
Left card |
Stage |
Resistor value [ohm] |
Reference Signal |
Gain |
Right card |
Stage |
Resistor value [ohm] |
Reference Signal |
Gain |
SR3: SN 1807783 |
R0 |
BF GAS |
60.0 |
4.90 Vpp |
4.90/5.02 = 0.976 |
R0 |
PI LVDT#1 |
50.7 |
4.90Vpp |
4.90/5.02 = 0.976 |
R1 |
SF GAS |
60.7 |
4.86 Vpp |
4.86/5.02 = 0.968 |
R1 |
PI LVDT#2 |
50.7 |
4.88 Vpp |
4.88/5.02 = 0.972 |
|
R2 |
F0 GAS |
60.9 |
4.86 Vpp |
4.86/5.02 = 0.968 |
R2 |
PI LVDT#3 |
50.0 |
4.88 Vpp |
4.88/5.02 = 0.972 |
|
R3 |
Not used |
60.7 |
4.86 Vpp |
4.86/5.02 = 0.968 |
R3 |
Not used |
50.9 |
4.86 Vpp |
4.86/5.02 = 0.968 |
Magnet Info
Location |
Size (mm) |
Number |
Material |
SR |
5xØ2 |
4 |
|
IM |
10xØ10 |
2x6 |
|
SR Damper |
10x10x12 |
72 |
NdFeB?? |
LBB Damper |
10x10x12 |
48 |
NdFeB?? |
Resonant frequency
Stage |
Measured resonant frequency [Hz] |
Q factor |
Assumed resonant frequency (SUMCON) [Hz] |
Reference |
F0 GAS |
0.5 |
19 |
0.3 |
klog 5446 |
SF GAS |
0.34 |
27.03 |
0.5 |
klog 5334 |
BF GAS |
0.417 |
22.28 |
0.38 |
klog 5334 |
IP |
0.33 |
?? |
| klog 5926 |
klog 5926 |
GAS filter suitable positions
In order to have the optic at the correct height the position of the F0 keystone must be set according to the current value of the F1 keystone postion using the formula in the table below. The reason for this is that the F1 fishing rod does not work and the height cannot be set without using the coil-magnet actuator, which for this case a large nuber of counts would be needed.
Filter |
LVDT readout (µm) |
klog |
Notes |
F0 |
-1263 µm - (F1 position) |
Depends on the F1 position because the F1 fishing rod is not operational. |
|
F1 |
F1 position |
The fishing rod does not work. |
|
BF |
0 |
|
We require the IM-V OSEM flags to be at the correct position. |
Updated models
Name |
Data from CAD only |
Includes GAS freq. |
Change IP leg Stiffness |
Change IP Torsional Stiffness |
|
TypeB_SR3_.m |
Yes |
No |
No |
No |
|
TypeB_SR3_05092018_enzo_1.m |
Yes |
Yes |
No |
No |
|
TypeB_SR3_05092018_enzo_1.m |
Yes |
Yes |
No |
No |
|
TypeB_SR3_05092018_enzo_1.m |
0.33 |
Yes |
Yes |
No |
No |