KAGRA/Subgroups/VIS/OpsManual/FishingRods - JGW Wiki

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

Range:
- LVDT: [ -1000 µm , +1800 ] µm (3280).
- Stepper motor: [ -746,000 , +746,000 ] steps (3280).
- Temperature when measured:
Observations: this fishing rod doesn't seem to have any problems, but we haven't used it at every temperature condition we've had.

SR2

Top filter

Range:
- LVDT: [ -1,700,000 , 1,500,000 ] µm
- Stepper motor:
- 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:

Other related entries

SR3

Top filter

Range:
- LVDT: µm
- Stepper motor:
- Temperature when measured:
Observations:

Standard Flter

Range:
- LVDT: µm
- Stepper motor:
- Temperature when measured:
Observations:

Bottom Filter

Range:
- LVDT: µm
- Stepper motor:
- Temperature when measured:
Observations:

Other related entries

8658, 8135.

SRM

Top Filter

Standard Filter

Bottom Filter