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= VIS = = Vibration Isolation System (VIS) =
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'''V'''ibration '''I'''solation '''S'''ystem is the hardware infrastructure for the main optics in the KAGRA interferometer. ||<#a31f52 style="color:#ffffff; text-align:center;"> '''Meetings'''||<#a31f52 style="color:#ffffff; text-align:center;"> '''Management'''||<#a31f52 style="color:#ffffff; text-align:center;"> '''Other subsystem interfaces''' ||<#a31f52 style="color:#ffffff; text-align:center;"> '''For Users'''||<#a31f52 style="color:#ffffff; text-align:center;"> '''Apps''' ||
||[[KAGRA/Subgroups/VIS/MeetingNAOJ|Weekly VIS meeting]] || [[KAGRA/Subgroups/VIS/Schedule|Schedule]]|| [[KAGRA/Subgroups/VIS/AELInterfaces|AEL interfaces]] ||[[KAGRA/Subgroups/VIS/BugReports|Bug Reports]] ||[[KAGRA/Subgroups/VIS/Simulation|SUMCON]] ||
||[[KAGRA/Subgroups/VIS/ExtraMeetings|Extraordinary meetings]] || || [[KAGRA/Subgroups/VIS/DGSInterfaces|DGS interfaces]] || || [[KAGRA/Subgroups/VIS/ModelPlotter|ModelPlotter]] ||
||[[KAGRA/Subgroups/VIS/OldVISMeetings|Old VISMeeting]] || || || || ||
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<<TableOfContents(3)>> ||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Suspensions''' ||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Mechanics''' ||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Sensors''' ||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Actuators/Motors'''||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Digital System'''||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Control'''||
||<style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/TypeA|Type-A]] || [[KAGRA/Subgroups/VIS/Mechanics/Pre-Isolator|Pre-Isolator]] || [[KAGRA/Subgroups/VIS/Sensors/InertialSensor|Inertial Sensor]] || [[KAGRA/Subgroups/VIS/Actuators/VoiceCoilActuator|Voice coil actuator]] || [[KAGRA/Subgroups/VIS/RealTimeModel|RTModel]] || [[KAGRA/Subgroups/VIS/Control/General|General concept]] ||
||<style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/TypeB|Type-B]] || [[KAGRA/Subgroups/VIS/Mechanics/GAS|GAS]] || [[KAGRA/Subgroups/VIS/Sensors/LVDT|LVDT]] || Solenoid actuator? || [[KAGRA/Subgroups/VIS/Guardian|Guardian]] || - ||
||<style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/TypeBp|Type-Bp]] || [[KAGRA/Subgroups/VIS/Mechanics/MagneticDamper|Magnetic damper]] ||[[KAGRA/Subgroups/VIS/Sensors/PhotoSensor|Photo Sensor]] || [[KAGRA/Subgroups/VIS/Motors/Picomotor|Picomotor]] || [[KAGRA/Subgroups/VIS/SDF|SDF]] || - ||
||<style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/Type-C|Type-C]] || [[KAGRA/Subgroups/VIS/Mechanics/MaragingWire|Maraging wire]] || [[KAGRA/Subgroups/VIS/Sensors/OpLev|Optical Lever (OpLev)]] || [[KAGRA/Subgroups/VIS/Motors/StepperMotor|Stepper motor]] || - || - ||
||<style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/TMS-VIS|TMS-VIS]] || --- ||<-2 style="text-align:center;"> [[KAGRA/Subgroups/VIS/Sensors/OSEM|OSEM]] || - || - ||
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== Space for VIS-internal use == ||<#52a31f style="color:#ffffff; text-align:center;"> '''Design''' ||<#52a31f style="color:#ffffff; text-align:center;"> '''Detail Design''' ||<#52a31f style="color:#ffffff; text-align:center;"> '''Installation''' ||<#52a31f style="color:#ffffff; text-align:center;"> '''Commissioning''' ||<#52a31f style="color:#ffffff; text-align:center;"> '''Operation''' ||<#52a31f style="color:#ffffff; text-align:center;"> '''Future Upgrade''' ||
|| Suspension Design || [[KAGRA/Subgroups/VIS/CAD|CAD]] || [[KAGRA/Subgroups/VIS/IstManual|Procedure]] || [[KAGRA/Subgroups/VIS/VISMON|VIS Monitors]] || [[KAGRA/Subgroups/VIS/OpsManual|Manual]]||[[KAGRA/Subgroups/VIS/Upgrade|Upgrade]] ||
|| [[KAGRA/Subgroups/VIS/ActuatorDesign|Actuator Design]] || [[KAGRA/Subgroups/VIS/RackLayout|Rack Layout]] || [[KAGRA/Subgroups/VIS/VISInstWorkInfo|Misc.]] || [[KAGRA/Subgroups/VIS/OpsManual/HealthCheck|HealthCheck]] || --- || --- || --- ||
|| --- || [[KAGRA/Subgroups/VIS/Cabling|Cabling]] || [[KAGRA/Subgroups/VIS/Calibration|Calibration]] || --- || --- || --- ||
|| --- || --- || [[KAGRA/Subgroups/VIS/Diagonalization|Diagonalization]] || --- || --- || --- ||
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=== Quick announcement === ||<#808080 style="color:#ffffff; text-align:center;"> '''Links, Misic.''' ||<#808080 style="color:#ffffff; text-align:center;"> '''Documents''' ||
||Wiki [[https://awiki.ligo-wa.caltech.edu/wiki/Seismic_Isolation| SEI]], [[https://awiki.ligo-wa.caltech.edu/wiki/Suspensions|SUS]] || [[KAGRA/Subgroups/VIS/Introduction|VIS Introduction]] ||
||Log [[https://alog.ligo-la.caltech.edu/SEI/index.php?content=1| SEI]], [[https://alog.ligo-wa.caltech.edu/aLOG/index.php?content=1|LHO]], [[https://alog.ligo-la.caltech.edu/aLOG/|LLO]], [[https://logbook.virgo-gw.eu/virgo/|Virgo]] || ||
|| [[KAGRA/Subgroups/VIS/Photos|Photos]] || ||
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=== Frequently used links ===
 * '''VIS meeting''': From 14:00 (JST) on every Friday - [[KAGRA/Subgroups/VIS/MeetingNAOJ|Meeting Page]]

----
== VIS Upgrades ==

[[KAGRA/Subgroups/VIS/Upgrade|Upgrade Page]]

----
== Instruments ==

=== Suspension types ===
[[KAGRA/Subgroups/VIS/TypeA|Type-A]]

[[KAGRA/Subgroups/VIS/TypeB|Type-B]]

[[KAGRA/Subgroups/VIS/TypeBp|Type-Bp]]

[[KAGRA/Subgroups/VIS/Type-C|Type-C]]

[[KAGRA/Subgroups/VIS/Payload|Payload]]

[[KAGRA/Subgroups/VIS/ActuatorDesign|Actuator design summary]]

[[KAGRA/Subgroups/VIS/ChangeLog|Design Change Logs]]

=== Suspended optics ===

The optics in the KAGRA interferometer is often called their acronyms/abbreviations. Please mind also that we call the vacuum chambers or clean booths in a similar manner.

 * Arm cavity
  * ETMX
  * ETMY
  * ITMX
  * ITMY
 * Beam splitter (BS)
 * Signal recycling cavity
  * SRM
  * SR2
  * SR3
 * Power recycling cavity
  * PRM
  * PR2
  * PR3
 * Input optics
  * IMC
  * IMMT1
  * IMMT2
 * Output optics
  * OMMT1
  * OMMT2
  * OSTM
  * OMC
 * Auxiliary optics
  * TMSX
  * TMSY

=== Mechanics ===

==== Tower ====
 * Pre-isolator
  * Inverted Pendulum (IP)
  * Top GAS Filter (TF<<FootNote(This abbreviation should be avoided because it often refers to rather Transfer Function.)>>)
 * Standard GAS Filter (SF)
 * Bottom GAS Filter (BF)
 * Magnetic damper

==== Payload ====
 * Cryogenic payload (CRYp): The bottom 4 stages in Type-A suspension, branch recoil-mass chain
  * Platform (PF)
  * Marionette (MN)
  * Intermediate Mass (IM)
  * Test Mass (TM)
 * Room-temperature payload: The bottom 2 stages in Type-B and Type-Bp suspension, parallel recoil-mass chain
  * Intermediate Mass (IM)
  * Test Mass (TM)

=== Sensors, actuators, and motors ===

 * LVDT - Linear Variable Differential Transducer/Transformer, displacement sensor
  * [''Derivative''] Bottom-filter LVDT (BF LVDT)
 * Geophone - inertial velocity sensor
 * Accelerometer -
 * Voice coil actuator

----
== Installation ==
 . [[KAGRA/Subgroups/VIS/IstManual|Installation Procedure]]
 . [[KAGRA/Subgroups/VIS/VISInstWorkInfo|Misc. Installation Work Information]]

 . [[KAGRA/Subgroups/VIS/iKAGRAbKAGRA|Tasks from iKAGRA to bKAGRA]]
----
== Real Time Model Development ==
 . [[KAGRA/Subgroups/VIS/RealTimeModel|Real-time Model Development]]
----
== Operation ==
 . [[KAGRA/Subgroups/VIS/OpsManual|Operation Manual]]

----
== VIS Introductioon ==
 . [[KAGRA/Subgroups/VIS/Introduction|Introduction materials for VIS]]
== Definition and scope ==
 1. xxxxx
 2. yyyyy
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----
== VIS Commissioning ==
 . [[KAGRA/Subgroups/VIS/Type-A/Commissioning|Type-A Commissioning]]



----
== Archives ==
 . [[KAGRA/Subgroups/VIS/Photos|Photos]]

----
== Old Weekly EVO Meeting ==
 . This meeting is suspended.

[[KAGRA/Subgroups/VIS/OldVISMeetings|Past minutes]]

== Subgroup ==

=== Members ===

 * Chief: R. Takahashi
 * Member: N. Ohishi, H. Ishizaki, F. E. Pena Arellano, M. Barton, N. Hirata, R. Flaminio, Y. Aso, T. Akutsu , E. Tapia (NAOJ),
 T. Sekiguchi, K. Yamamoto, T. Uchiyama (ICRR), R. DeSalvo (Univ. of Sannio), E. Majorana (INFN Rome), J. van den Brand, E. Hennes, A. Bertolini, J. van Heijningen, K. Agatsuma (NIKHEF)

=== Communication info ===

 * Mailing list: [kagra-seis]

<<Navigation(children)>>
-----
/!\ [April 28. 2020] Miyo is cleaning up the VIS wiki pages. Progress is posted [[https://github.com/gw-vis/kagra-vis/issues/18|here]].

Vibration Isolation System (VIS)

Meetings

Management

Other subsystem interfaces

For Users

Apps

Weekly VIS meeting

Schedule

AEL interfaces

Bug Reports

SUMCON

Extraordinary meetings

DGS interfaces

ModelPlotter

Old VISMeeting

Suspensions

Mechanics

Sensors

Actuators/Motors

Digital System

Control

Type-A

Pre-Isolator

Inertial Sensor

Voice coil actuator

RTModel

General concept

Type-B

GAS

LVDT

Solenoid actuator?

Guardian

-

Type-Bp

Magnetic damper

Photo Sensor

Picomotor

SDF

-

Type-C

Maraging wire

Optical Lever (OpLev)

Stepper motor

-

-

TMS-VIS

---

OSEM

-

-

Design

Detail Design

Installation

Commissioning

Operation

Future Upgrade

Suspension Design

CAD

Procedure

VIS Monitors

Manual

Upgrade

Actuator Design

Rack Layout

Misc.

HealthCheck

---

---

---

---

Cabling

Calibration

---

---

---

---

---

Diagonalization

---

---

---

Links, Misic.

Documents

Wiki SEI, SUS

VIS Introduction

Log SEI, LHO, LLO, Virgo

Photos

Definition and scope

  1. xxxxx
  2. yyyyy


/!\ [April 28. 2020] Miyo is cleaning up the VIS wiki pages. Progress is posted here.

KAGRA/Subgroups/VIS (last edited 2022-02-25 19:10:23 by HirotakaYuzurihara)