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= VIS = = Vibration Isolation System (VIS) =
== Requirements ==
VIS subgroup guarantee the following items;
 1. '''Isolation performance''': Does not contaminate the design sensitivity
 2. '''Stability''': Keep the above performance in anytime
 3. '''Operability''': Recover the all VIS system automatically
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'''V'''ibration '''I'''solation '''S'''ystem is the hardware infrastructure for the main optics in the KAGRA interferometer. Detail descriptions are written in here: [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11930|JGW-E2011930]]
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<<TableOfContents(3)>> ||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Design''' ||<#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'''||
|| Concept? ||<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]] ||
|| [[KAGRA/Subgroups/VIS/ActuatorDesign|Actuator Design]] ||<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/OpsManual/Pico|Picomotor]] || [[KAGRA/Subgroups/VIS/OpsManual/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/DGS/Projects/StepperMotor|Stepper Motor]] || - || - ||
|| - ||<style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/TMS-VIS|TMS-VIS]] || - || - || [[KAGRA/Subgroups/VIS/OpsManual/FishingRods|Fishing Rods]] || - || - ||
|| - || - || - ||<-2 style="text-align:center;"> [[KAGRA/Subgroups/VIS/Sensors/OSEM|OSEM]] || - || - ||
|| - || - || - ||<-3 style="text-align:center;"> [[KAGRA/Subgroups/VIS/TempControl|Temp. Control]] || - ||
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== Space for VIS-internal use ==

=== Quick announcement ===

=== 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 are 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)

=== Electronics ===

A list of local sensors, actuators, and motors equipped by the suspension systems.

 * '''LVDT''' - Linear Variable Differential Transducer/Transformer, displacement sensor
  * [''Derivative''] Bottom-filter LVDT (BF LVDT)
 * '''Geophone''' - inertial velocity sensor
 * '''Accelerometer''' -
 * '''OSEM''' - Optical Sensor and Electromagnet
 * '''Optical Lever'''
 * '''Fishing rod'''
 * Picomotor
 *

----
== 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]]		 ||<#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;"> '''VIS 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/OpsManual/SUMCON|SUMCON]]||
||[[KAGRA/Subgroups/VIS/ExtraMeetings|Extraordinary meetings]] || [[https://github.com/orgs/gw-vis/projects|Github Projects]]|| [[KAGRA/Subgroups/VIS/DGSInterfaces|DGS interfaces]] || [[KAGRA/Subgroups/VIS/TroubleShooting|Trouble Shooting]] || [[KAGRA/Subgroups/VIS/ModelPlotter|ModelPlotter]] ||
||[[KAGRA/Subgroups/VIS/OldVISMeetings|Old VISMeeting]] || || || || [[KAGRA/Subgroups/VIS/OpsManual/AutoMeasurement|AutoMeasurement]] ||
|| --- || --- || --- || --- || [[KAGRA/Subgroups/VIS/OpsManual/SuspensionControlModeling|SuspensionControlModeling]] ||
|| --- || --- || --- || --- || [[KAGRA/Subgroups/VIS/Kontrol|Kontrol]] ||
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----
== VIS Commissioning ==
 . [[KAGRA/Subgroups/VIS/Type-A/Commissioning|Type-A Commissioning]]		 ||<#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/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/Acceptance Test|Acceptance Test]] || --- || ├ --- || --- ||
|| --- || --- || [[KAGRA/Subgroups/VIS/Diagonalization|Diagonalization]] || --- || └ || --- ||
|| --- || --- || --- || --- || [[KAGRA/Subgroups/VIS/OpsManual/TypeA|TypeA|]] || --- ||
|| --- || --- || --- || --- || [[KAGRA/Subgroups/VIS/OpsManual/TypeB|TypeB|]] || --- ||
|| --- || --- || --- || --- || [[KAGRA/Subgroups/VIS/OpsManual/TypeBp|TypeBp|]] || --- ||
|| --- || --- || --- || --- || [[KAGRA/Subgroups/VIS/OpsManual/TypeC|TypeC|]] || --- ||
|| --- || --- || --- || --- || [[KAGRA/Subgroups/VIS/OpsManual/TMS-VIS|TMS-VIS|]] || --- ||
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||<#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]] || [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4005|VIS Doc. Tree]]　||
|| [[KAGRA/Subgroups/VIS/Photos|Photos]] || ||
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----
== 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)

Requirements

VIS subgroup guarantee the following items;

  1. Isolation performance: Does not contaminate the design sensitivity

  2. Stability: Keep the above performance in anytime

  3. Operability: Recover the all VIS system automatically

Detail descriptions are written in here: JGW-E2011930

Design

Suspensions

Mechanics

Sensors

Actuators/Motors

Digital System

Control

Concept?

Type-A

Pre-Isolator

Inertial Sensor

Voice coil actuator

RTModel

General concept

Actuator Design

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

-

-

Fishing Rods

-

-

-

-

-

OSEM

-

-

-

-

-

Temp. Control

-

Meetings

Management

Other subsystem interfaces

For Users

VIS Apps

Weekly VIS meeting

Schedule

AEL interfaces

Bug Reports

SUMCON

Extraordinary meetings

Github Projects

DGS interfaces

Trouble Shooting

ModelPlotter

Old VISMeeting

AutoMeasurement

---

---

---

---

SuspensionControlModeling

---

---

---

---

Kontrol

Design

Detail Design

Installation

Commissioning

Operation

Future Upgrade

Suspension Design

CAD

Procedure

VIS Monitors

Manual

Upgrade

---

Rack Layout

Misc.

HealthCheck

├ ---

---

---

Cabling

Calibration

---

├ ---

---

---

---

Acceptance Test

---

├ ---

---

---

---

Diagonalization

---

└

---

---

---

---

---

TypeA

---

---

---

---

---

TypeB

---

---

---

---

---

TypeBp

---

---

---

---

---

TypeC

---

---

---

---

---

TMS-VIS

---

Links, Misic.

Documents

Wiki SEI, SUS

VIS Introduction

Log SEI, LHO, LLO, Virgo

VIS Doc. Tree　

Photos

/!\ [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)