Describe KAGRA/Subgroups/VIS/OpsManual/FishingRods here.

This page describes the status of the fishing rods.

Beam splitter

Top filter

• At 25 ºC it's possible to use the fishing rod to set the keystone at nominal position (8125).

• at 24.5 ºC or lower it's not (8645, 11465).

• Range: from -2500 µm to +4900 µm in the LVDT and from -1,400,000 to +1,400,000 steps in the stepper motor (7694). What was the temperature that day?

Standard Filter

• It's been at its lowest position since the temperature was 25 ºC. We set the keystone to 488 µm and couldn't move it down more (8125, 8645).

• Range: from -700 µm to +700 µm in the LVDT and from -870,000 to +835,000 steps in the stepper motor (3558). What was the temperature that day?

Bottom filter

• This fishing rod didn't seem to have any problems before but we haven't tried to use it at every temperature condition we've had.

• Range: from -1000 µm to +1800 µm in the LVDT and from -746,000 to +746,000 steps in the stepper motor (3280).

SR2