Differences between revisions 9 and 49 (spanning 40 versions)
Revision 9 as of 2019-11-11 19:19:23
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Revision 49 as of 2019-11-13 16:43:56
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Deletions are marked like this. Additions are marked like this.
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Beam splitter
||<tablewidth="1202px" tableheight="156px">Stage ||Description ||Relevant log entries ||
||Top Filter ||At 25 ºC it's possible to use it to set the keystone at nominal ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8125|8125]]), but at 24.5 ºC or lower it's not ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8645|8645]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=11465|11465]]). ||[[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8125|8125]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8645|8645]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=11465|11465]] ||
||Standard Filter || || ||
||Bottom Filter || || ||
== 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]]).
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=== 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]]).
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=== 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]]).
  * 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 ===
 * '''Range:'''
  * '''LVDT:''' [ -865 , 626 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7857|7857]]).
  * '''Stepper motor:''' [ -1,600,000 , 1,600,00 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7857|7857]]).
  * Temperature when measured:
 * '''Observations:'''

=== Standard Filter ===
 * '''Range:'''
  * '''LVDT:''' [ -1,700 , 1,400 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4721|4721]]) .
  * '''Stepper motor:''' [ -700,000 , 1,100,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4721|4721]]) .
  * Temperature when measured:
 * '''Observations:'''

=== Bottom Filter ===
 * '''Range:'''
  * '''LVDT:''' [ -3,000 , 2,800 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4721|4721]]).
  * '''Stepper motor:''' [ -600,000 , 800,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4721|4721]]).
  * Temperature when measured:
 * '''Observations:'''

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).

    • 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

  • Range:

    • LVDT: [ -865 , 626 ] µm (7857).

    • Stepper motor: [ -1,600,000 , 1,600,00 ] steps (7857).

    • Temperature when measured:
  • Observations:

Standard Filter

  • Range:

    • LVDT: [ -1,700 , 1,400 ] µm (4721) .

    • Stepper motor: [ -700,000 , 1,100,000 ] steps (4721) .

    • Temperature when measured:
  • Observations:

Bottom Filter

  • Range:

    • LVDT: [ -3,000 , 2,800 ] µm (4721).

    • Stepper motor: [ -600,000 , 800,000 ] steps (4721).

    • Temperature when measured:
  • Observations:

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