Describe KAGRA/Subgroups/VIS/OpsManual/FishingRods here.
This page describes the status of the fishing rods.
Beam splitter
Top filter
Range:
LVDT: [ -2500 , +4900 ] µm (7694).
Stepper motor: [ -1,400,000 , +1,400,000 ] steps (7694).
- Temperature when measured:
Observations:
At 25 ºC it was possible to use the fishing rod to set the keystone at nominal position (8125).
at 24.5 ºC or colder it was not (8645, 11465).
Standard Filter
Range:
LVDT: [ -700 , +700 ] µm (3558).
Stepper motor: [ -870,000 to +835,000 ] steps (3558).
- Temperature when measured:
Observations:
It's been at its lowest position since the temperature was 25 ºC (8125, 8645).
We set the keystone to 488 µm and couldn't move it further down (8125, 8645).
Bottom filter
SR2
Top filter
Range:
LVDT: [ -990 , 903 ] µm (8082).
Stepper motor: [ -1,700,000 , 1,500,000 ] steps (8082).
- Temperature when measured:
- Observations:
Stardard filter
Range:
LVDT: [ -750 , 1000 ] µm (4431).
Stepper motor: [ 300,000 , 1,000,00 ] steps (4431).
- Temperature when measured:
- Observations:
Bottom filter
Range:
LVDT: [ -500 , 600 ] µm (4430).
Stepper motor: [ -550,000 , -250,000 ] steps (4430).
- Temperature when measured:
- Observations:
8082
SR3
Top filter
Range:
LVDT: [ 885 , -1299 ] µm (7758).
Stepper motor: [ -500,000 , 1,100,000 ] steps (7758).
- Temperature when measured:
- Observations:
Standard Flter
Range:
LVDT: [ -2000 , 2000 ] µm (4720).
Stepper motor: [ -700,000 , 1,100,000 ] steps (4720).
- Temperature when measured:
- Observations:
Bottom Filter
SRM
Top Filter
(7857)
Standard Filter
(4721)
Bottom Filter
(4721)