KAGRA VIS Operations Manual - SR3 Suspension Reference
IP Optimum Position
See klog 7783.
- H1: -2474 µm.
- H2: -2624µm.
- H3: -2191 µm.
- L: 82 µm.
- T: -212 µm.
- Y: -4091 µrad.
Stepper Driver Info
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 |
Fancy Stepper Driver
IP L |
+5000 steps -> ≈+??? µm IP-L |
IP T |
+5000 steps -> ≈+70 µm IP-T |
IP Y |
+5000 steps -> ≈+??? µrad IP-Y |
F0 Y |
+50 steps -> ≈-50 µrad OL-Y |
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 |
|
|
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
Filter |
LVDT readout (µm) |
klog |
Notes |
F0 |
-542 |
Depends on the F1 position because the F1 fishing rod is not operational. |
|
F1 |
-721 |
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 |
Optimum Temperature
See klog 7420.