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== Beam splitter ==
=== Top filter ===
 * '''Range:'''
  * '''LVDT:''' [ -2500 , +4900 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7694|7694]]).
  * '''Stepper motor:''' [ -1,400,000 , +1,400,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7694|7694]]).
  * Temperature when measured:
 * '''Observations:'''
  * At 25 ºC it was possible to use the fishing rod to set the keystone at nominal position ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8125|8125]]).
  * at 24.5 ºC or colder it was not ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8645|8645]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=11465|11465]]).

=== Standard Filter ===
 * '''Range:'''
  * '''LVDT:''' [ -700 , +700 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3358|3558]]).
  * '''Stepper motor:''' [ -870,000 to +835,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3358|3558]]).
  * Temperature when measured:
 * '''Observations:'''
  * It's been at its lowest position since the temperature was 25 ºC ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8125|8125]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8645|8645]]).
  * We set the keystone to 488 µm and couldn't move it further down ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8125|8125]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8645|8645]]).

=== Bottom filter ===
 * '''Range:'''
  * '''LVDT:''' [ -1000 µm , +1800 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3280|3280]]).
  * '''Stepper motor:''' [ -746,000 , +746,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3280|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:''' [ -990 , 903 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8082|8082]]).
  * Stepper motor: [ -1,700,000 , 1,500,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8082|8082]]).
  * Temperature when measured:
 * Observations:

=== Stardard filter ===
 * '''Range:'''
  * '''LVDT:''' [ -750 , 1000 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4431|4431]]).
  * '''Stepper motor:''' [ 300,000 , 1,000,00 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4431|4431]]).
  * Temperature when measured:
 * Observations:

=== Bottom filter ===
 * '''Range:'''
  * '''LVDT:''' [ -500 , 600 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4430|4430]]).
  * '''Stepper motor:''' [ -550,000 , -250,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4430|4430]]).
  * Temperature when measured:
 * Observations:

=== Other related entries ===
[[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8082|8082]]

== SR3 ==
=== Top filter ===
 * '''Range:'''
  * '''LVDT:''' [ 885 , -1299 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7758|7758]]).
  * '''Stepper motor:''' [ -500,000 , 1,100,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7758|7758]]).
  * Temperature when measured:
 * '''Observations:''' After pump down it was not possible to move the keystone to zero using the fishing rod. It went as high as -750 µm at the time ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8135|8135]]).

=== Standard Flter ===
 * '''Range:'''
  * '''LVDT:''' [ -2000 , 2000 ]''' '''µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4720|4720]]).
  * '''Stepper motor:''' [ -700,000 , 1,100,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4720|4720]]).
  * Temperature when measured:
 * '''Observations:'''This fishing rod of not working at all ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8135|8135]]). It's a real shame because it had a large range of 4 mm total.

=== Bottom Filter ===
 * '''Range:'''
  * '''LVDT:''' [ -1600 , +1000 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4654|4654]]).
  * Stepper motor: [ -200,000 , 250,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4654|4654]]). (Not )
  * Temperature when measured:
 * '''Observations:'''
  * After pump down it was not possible to move the keystone to zero using the fishing rod. It went as high as -265 µm at the time [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8658|8658]].
  * The number of steps for the stepper motor seem relatively small. In principle there's nothing wrong with this but let's point this out.

=== Other related entries ===
 . [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8658|8658]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8135|8135]].

== SRM ==
=== Top Filter ===
([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7857|7857]])

=== Standard Filter ===
([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4721|4721]])

=== Bottom Filter ===
([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4721|4721]])

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: [ -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: After pump down it was not possible to move the keystone to zero using the fishing rod. It went as high as -750 µm at the time (8135).

Standard Flter

  • Range:

    • LVDT: [ -2000 , 2000 ] µm (4720).

    • Stepper motor: [ -700,000 , 1,100,000 ] steps (4720).

    • Temperature when measured:

  • Observations:This fishing rod of not working at all (8135). It's a real shame because it had a large range of 4 mm total.

Bottom Filter

  • Range:

    • LVDT: [ -1600 , +1000 ] µm (4654).

    • Stepper motor: [ -200,000 , 250,000 ] steps (4654). (Not )

    • Temperature when measured:

  • Observations:

    • After pump down it was not possible to move the keystone to zero using the fishing rod. It went as high as -265 µm at the time 8658.

    • The number of steps for the stepper motor seem relatively small. In principle there's nothing wrong with this but let's point this out.

SRM

Top Filter

(7857)

Standard Filter

(4721)

Bottom Filter

(4721)

KAGRA/Subgroups/VIS/OpsManual/FishingRods (last edited 2020-09-18 10:45:40 by fabian.arellano)