KAGRA VIS Operations Manual - SR2 Suspension Reference
Cut and Pasted from BS - Needs Checking!!!
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 H0 |
0 |
IP Clockwise |
|
PI H1 |
1 |
IP Clockwise |
|
PI H2 |
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 |
|
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 Info
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 |
|
|
|
|
PI Horizontal 2/3 |
117.4 Ω |
75.4 Ω |
214.0 Ω |
2018-06-26 |
PI Horizontal 3/3 |
|
|
|
|
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 @Type5+3 |
RM |
- |
- |
11.3 |
14.8 |
|
IRM |
1.051 |
0.47 |
11.3 |
14.8 |
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?? |
Filter Info
Stage |
f (Hz) |
klog |
m (kg) |
klog |
k (N/m) |
klog |
kFR (N/m) |
klog |
F0 |
|
|
252.8 |
4371 |
|
|
|
|
SF |
|
|
162.9+0.8=163.7 |
4266 |
|
|
|
|
BF |
|
|
53.1-1.048=52.1 |
3971, 4002 |
|
|
|
|