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 |
?? |
?? |
|
7Ω |
|
|
Stepper |
Controller |
Channel |
Effect of "Left" Cmd |
BF GAS |
0 |
Keystone Up |
|
SF GAS |
1 |
Keystone Up |
|
F0 GAS |
2 |
Keystone Up |
|
PI H1 |
0 |
IP Clockwise |
|
PI H2 |
1 |
IP Clockwise |
|
PI H3 |
2 |
IP Clockwise |
|
PI Yaw |
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 |
|
IM H2 |
28 |
|
IM H3 |
29 |
|
IM V1 |
30 |
|
IM V2 |
31 |
|
IM V3 |
32 |
Magnet Info
Location |
Size (mm) |
Number |
Material |
BS (Old) |
3xØ6 |
4 |
NdFeB |
BS (New) |
3xØ2 |
4 |
|
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 |
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.