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 * '''VIS meeting''': From 14:00 (JST) on every Friday - [[KAGRA/Subgroups/VIS/MeetingNAOJ|Meeting Page]]

||<#89C3EB style="texxt-align:center;"> '''Meetings'''||
||[[KAGRA/Subgroups/VIS/MeetingNAOJ|VIS Meeting]] ||

||<#89C3EB style="text-align:center; "> '''Tall suspensions''' ||<:-4> [[KAGRA/Subgroups/VIS/TypeA|Type-A]]||<:-4> [[KAGRA/Subgroups/VIS/TypeB|Type-B]] ||<:-3> [[KAGRA/Subgroups/VIS/TypeBp|Type-Bp]] ||
||<style="text-align:center; "> '''Optics''' || [[KAGRA/Subgroups/VIS/TypeA/ETMX|ETMX]] || [[KAGRA/Subgroups/VIS/TypeA/ETMY|ETMY]] || [[KAGRA/Subgroups/VIS/TypeA/ITMX|ITMX]] || [[KAGRA/Subgroups/VIS/TypeA/ITMY|ITMY]] ||
||<#89C3EB style="text-align:center; "> '''Short suspensions''' ||<:-4> [[KAGRA/Subgroups/VIS/Type-C|Type-C]]||<:-4> [[KAGRA/Subgroups/VIS/TypeB|Type-B]] ||<:-3> [[KAGRA/Subgroups/VIS/TypeBp|Type-Bp]] ||

||<|4> [[KAGRA/Subgroups/VIS/Type-C|Type-C]] || ||
|| ||
|| ||
|| ||
|| ||
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== Headlines ==
=== Frequently used links ===
 * '''VIS meeting''': From 14:00 (JST) on every Friday - [[KAGRA/Subgroups/VIS/MeetingNAOJ|Meeting Page]]
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[[KAGRA/Subgroups/VIS/TypeA|Type-A]]

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

[[KAGRA/Subgroups/VIS/TypeBp|Type-Bp]]
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====
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 * Picomotor
 * 		 * '''Picomotor'''
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== Integration with digital system == == Signal processing ==
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 . ''See also:'' [[KAGRA/Subgroups/DGS|DGS subgroup]]  . ''Related subgroups'': [[KAGRA/Subgroups/AEL|AEL]], [[KAGRA/Subgroups/DGS|DGS]]

VIS

Vibration Isolation System is the hardware infrastructure for the main optics in the KAGRA interferometer.

  • VIS meeting: From 14:00 (JST) on every Friday - Meeting Page

Meetings

VIS Meeting

Tall suspensions

Type-A

Type-B

Type-Bp

Optics

ETMX

ETMY

ITMX

ITMY

Short suspensions

Type-C

Type-B

Type-Bp

Type-C

Contents

  1. VIS
    1. VIS Upgrades
    2. Instruments
      1. Suspension types
      2. Suspended optics
      3. Mechanics
      4. Electronics
    3. Signal processing
      1. Real-time front-end model
    4. Apps
    5. Installation
    6. Real Time Model Development
    7. Operation
    8. VIS Introductioon
    9. VIS Commissioning
    10. Archives
    11. Old Weekly EVO Meeting
    12. Subgroup
      1. Members
      2. Communication info

VIS Upgrades

Upgrade Page

Instruments

Suspension types

Type-C

Payload

Actuator design summary

Design Change Logs

Suspended optics

The optics in the KAGRA interferometer are often called their acronyms/abbreviations1 listed below. The linked pages from the optics' names show the specification of each component of the suspension systems.

  • 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 (TF2)

  • 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

Signal processing

All the sensor readouts, actuation signals, and motor operation commands are governed with the KAGRA digital signal processing system provided by DGS subgroup.

Real-time front-end model

Apps

Installation

Real Time Model Development

Operation

VIS Introductioon

VIS Commissioning

Archives

Old Weekly EVO Meeting

  • This meeting is suspended.

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]

/AELInterfaces   /Acceptance Test   /ActuatorDesign   /AssemblyStatus   /BIO   /BrainStorm/ToDo2019   /CRYInterfaces   /ChangeLog   /ChangeLog/DesignChangeProcedure   /DGSInterfaces   /DGSInterfaces/RTModel   /Daily Operations   /FEM   /FEM/tama_sas   /Guardian   /Installation/Type-A   /Installation/Type-B   /Installation/Type-Bp   /Installation/Type-C   /Installation/iKAGRATM   /Introduction   /IstManual   /KAGRA/Subgroups/VIS/Daily Operations   /Kontrol   /Maintainance   /Mechanics/GAS   /Mechanics/IP   /Mechanics/Pre-Isolator   /MeetingNAOJ   /MeetingNAOJ/20150805   /ModelPlotter   /Motors/FishingRod   /OldVISMeetings   /OpsManual   /OpsManual/AutoBuild   /OpsManual/AutoMeasurement   /OpsManual/BURT   /OpsManual/CommandLineUtils   /OpsManual/DGSMaintainance   /OpsManual/DIO   /OpsManual/DV   /OpsManual/Drawings   /OpsManual/FishingRods   /OpsManual/Foton   /OpsManual/Git   /OpsManual/Guardian   /OpsManual/HealthCheck   /OpsManual/LVDT   /OpsManual/MEDM   /OpsManual/OSEMs   /OpsManual/OpLev   /OpsManual/OpLev/TypeA   /OpsManual/OpLev/TypeB   /OpsManual/Pico   /OpsManual/Pico/BS_Picos   /OpsManual/Pico/Manual   /OpsManual/PumpdownAndVenting   /OpsManual/Remote   /OpsManual/SDF   /OpsManual/SUMCON   /OpsManual/SVN   /OpsManual/Simulink   /OpsManual/Stepper   /OpsManual/Stepper/Direction   /OpsManual/StripTool   /OpsManual/SuspensionControlModeling   /OpsManual/Thermometers   /OpsManual/Traverser   /OpsManual/Troubleshooting   /OpsManual/TypeA   /OpsManual/TypeB   /OpsManual/TypeB/BSData   /OpsManual/TypeB/ControlWork01   /OpsManual/TypeB/HealthCheck   /OpsManual/TypeB/PumpdownAndVenting   /OpsManual/TypeB/SR2Data   /OpsManual/TypeB/SR3Data   /OpsManual/TypeB/SRMData   /OpsManual/TypeBp   /OpsManual/TypeC   /OpsManual/VisualStudioCode   /OpsManual/cdscfg   /OpsManual/diaggui   /OpsManual/vistools   /Optics   /Optics/ETMX   /Payload   /Photos   /RealTimeModel   /ReleaseSensor   /Requirement   /Schedule   /Sensors/Geophone   /Sensors/InertialSensor   /Sensors/LVDT   /Sensors/OpLev   /Simulation   /TempControl   /Type-A/Commissioning   /Type-A/Commissioning/Tasks   /Type-C   /Type-C/Design2016   /Type-C/Drawings   /Type-C/Drawings/Comment   /Type-C/IMC_Suspension   /Type-C/IMMT   /Type-C/OSEM   /Type-C/iKAGRA_ETM   /TypeA   /TypeA/DGSchannel   /TypeA/DGSrack   /TypeA/ETMX   /TypeA/ETMY   /TypeA/Feedthough   /TypeA/ITMX   /TypeA/ITMY   /TypeA/Meeting   /TypeA/WorkingLog   /TypeA/WorkingLog/dir_information   /TypeB   /TypeB/April2018   /TypeB/BSTestHangIssues   /TypeB/BSdetail   /TypeB/Boxes and cables used in SR3   /TypeB/Boxes and cables used in SRM   /TypeB/Boxes used in BS   /TypeB/Boxes used in SR3   /TypeB/Characterization   /TypeB/ItemsSR   /TypeB/LVDT Driver info   /TypeB/March2018   /TypeB/MarkB   /TypeB/Minutes   /TypeB/NotesProvisional   /TypeB/PaperTODOlist   /TypeB/PaperTODOlist/klogs_md_ring   /TypeB/PostO3   /TypeB/Rack Information   /TypeB/SR2detail   /TypeB/SR3_installation   /TypeB/SR3detail   /TypeB/SRMdetail   /TypeB/Status   /TypeB/TaskList   /TypeB/ToDo   /TypeB/ToDoBS   /TypeB/ToDoEtc   /TypeB/ToDoOld   /TypeB/ToDoOldBS   /TypeB/ToDoOldSR   /TypeB/ToDoSR   /TypeB/WishList   /TypeB/dummyBS   /TypeBp   /TypeBp/Overview   /TypeBp/PR2   /TypeBp/PR3   /TypeBp/PRM   /TypeBp/PRsus   /TypeBp/Rack   /TypeBp/WorkNotes   /TypeBp/meeting160323   /TypeBp/meeting160721   /Upgrade   /VIS/OpsManual/Stepper/Direction   /VISAgenda20160610   /VISAgenda20160617   /VISHack   /VISInstWorkInfo   /VISMinutes20151030   /VISMinutes20151105   /VISMinutes20151113   /VISMinutes20151120   /VISMinutes20151127   /VISMinutes20151204   /VISMinutes20151211   /VISMinutes20151218   /VISMinutes20151222   /VISMinutes20151225   /VISMinutes20160106   /VISMinutes20160107   /VISMinutes20160108   /VISMinutes20160115   /VISMinutes20160122   /VISMinutes20160126   /VISMinutes20160129   /VISMinutes20160204   /VISMinutes20160205   /VISMinutes20160212   /VISMinutes20160219   /VISMinutes20160226   /VISMinutes20160304   /VISMinutes20160311 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/VISMinutes20180202   /VISMinutes20180209   /VISMinutes20180216   /VISMinutes20180223   /VISMinutes20180302   /VISMinutes20180309   /VISMinutes20180316   /VISMinutes20180323   /VISMinutes20180330   /VISMinutes20180406   /VISMinutes20180413   /VISMinutes20180420   /VISMinutes20180427   /VISMinutes20180511   /VISMinutes20180525   /VISMinutes20180601   /VISMinutes20180608   /VISMinutes20180615   /VISMinutes20180622   /VISMinutes20180629   /VISMinutes20180706   /VISMinutes20180713   /VISMinutes20180720   /VISMinutes20180727   /VISMinutes20180803   /VISMinutes20180810   /VISMinutes20180831   /VISMinutes20180907   /VISMinutes20180914   /VISMinutes20180921   /VISMinutes20180928   /VISMinutes20181005   /VISMinutes20181012   /VISMinutes20181019   /VISMinutes20181026   /VISMinutes20181102   /VISMinutes20181109   /VISMinutes20181116   /VISMinutes20181123   /VISMinutes20181130   /VISMinutes20181214   /VISMinutes20181221   /VISMinutes20190111   /VISMinutes20190118   /VISMinutes20190125   /VISMinutes20190201   /VISMinutes201902015   /VISMinutes201902022   /VISMinutes20190208   /VISMinutes20190301   /VISMinutes20190308   /VISMinutes20190315   /VISMinutes20190322   /VISMinutes20190329   /VISMinutes20190405   /VISMinutes20190412   /VISMinutes20190426   /VISMinutes20190517   /VISMinutes20190524   /VISMinutes20190531   /VISMinutes20190607   /VISMinutes20190614   /VISMinutes20190621   /VISMinutes20190628   /VISMinutes20190705   /VISMinutes20190712   /VISMinutes20190719   /VISMinutes20190725   /VISMinutes20190802   /VISMinutes20190809   /VISMinutes20190816   /VISMinutes20190830   /VISMinutes20190906   /VISMinutes20190913   /VISMinutes20190920   /VISMinutes20190927   /VISMinutes20191011   /VISMinutes20191018   /VISMinutes20191025   /VISMinutes20191101   /VISMinutes20191108   /VISMinutes20191115   /VISMinutes20191122   /VISMinutes20191129   /VISMinutes20191206   /VISMinutes20191213   /VISMinutes20191220   /VISMinutes20200110   /VISMinutes20200117   /VISMinutes20200124   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/VISMinutes20210129   /VISMinutes20210205   /VISMinutes20210212   /VISMinutes20210219   /VISMinutes20210226   /VISMinutes20210226/2021-02-22   /VISMinutes20210226/2021-02-23   /VISMinutes20210226/2021-02-24   /VISMinutes20210305   /VISMinutes20210312   /VISMinutes20210319   /VISMinutes20210326   /VISMinutes20210402   /VISMinutes20210409   /VISMinutes20210416   /VISMinutes20210423   /VISMinutes20210430   /VISMinutes20210507   /VISMinutes20210514   /VISMinutes20210521   /VISMinutes20210528   /VISMinutes20210604   /VISMinutes20210611   /VISMinutes20210618   /VISMinutes20210625   /VISMinutes20210702   /VISMinutes20210709   /VISMinutes20210716   /VISMinutes20210730   /VISMinutes20210806   /VISMinutes20210813   /VISMinutes20210820   /VISMinutes20210827   /VISMinutes20210903   /VISMinutes20210910   /VISMinutes20210917   /VISMinutes20210924   /VISMinutes20211001   /VISMinutes20211008   /VISMinutes20211015   /VISMinutes20211022   /VISMinutes20211029   /VISMinutes20211105   /VISMinutes20211112   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  1. Please mind also that we call the vacuum chambers or clean booths in a similar manner. (1)

  2. This abbreviation should be avoided because it often refers to rather transfer function. (2)

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