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| = Vibration Isolation System (VIS) = | |
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| = VIS = | == Subsystem Definition == 1. This subsystem makes vibration isolation for all optics used in KAGRA. 2. Requirement of displacement of the test mass mirrors must be less than 4x10^-20m/rtHz at 10Hz. RMS motion must be less than 0.1 um as displacement and 0.1 um/s as velocity. （please note that it is old information） |
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| '''V'''ibration '''I'''solation '''S'''ystem is the hardware infrastructure for the main optics in the KAGRA interferometer. | Reference [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=365|JGW-T1100365-v2]] |
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| * '''VIS meeting''': From 14:00 (JST) on every Friday - [[KAGRA/Subgroups/VIS/MeetingNAOJ|Meeting Page]] | ----- ||<#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'''|| || 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/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]] || ||[[KAGRA/Subgroups/VIS/Requirement|Requirement]] ||<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]] || [[KAGRA/Subgroups/VIS/BIO|BIO]] || || - ||<style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/TMS-VIS|TMS-VIS]] || - || [[KAGRA/Subgroups/VIS/ReleaseSensor|Release Sensor]] || [[KAGRA/Subgroups/VIS/OpsManual/FishingRods|Fishing Rods]] || - || || - || - || - || - || [[KAGRA/Subgroups/VIS/OpsManual/Traverser|Traverser]] || - || || - || - || - || - || [[KAGRA/Subgroups/VIS/OpsManual/PicomotorPowerControlSwitch| PicomotorPowerControlSwitch]] || - || || - || - || - ||<-2 style="text-align:center;"> [[KAGRA/Subgroups/VIS/Sensors/OSEM|OSEM]] || - || || - || - || - ||<-2 style="text-align:center;"> [[KAGRA/Subgroups/VIS/TempControl|Temp. Control]] || - || |
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| ||<#89C3EB style="texxt-align:center;"> '''Meetings'''|| ||[[KAGRA/Subgroups/VIS/MeetingNAOJ|Weekly VIS Meeting]] || ||[[KAGRA/Subgroups/VIS/ExtraMeetings|Extraordinary Meetings || |
||<#a31f52 style="color:#ffffff; text-align:center;"> '''Meetings'''||<#a31f52 style="color:#ffffff; text-align:center;"> '''Management'''||<#a31f52 style="color:#ffffff; text-align:center;"> '''Maintainance/Diagnostics'''||<#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/Maintainance|Maintainance]] ||[[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://app.zenhub.com/workspaces/upgrade-for-o4-5f56e83aff8ec50012d90116/board?repos=276073075|Github Projects]]|| [[KAGRA/Subgroups/VIS/Acceptance Test|Acceptance Test]] || [[KAGRA/Subgroups/VIS/DGSInterfaces|DGS interfaces]] || [[KAGRA/Subgroups/VIS/TroubleShooting|Trouble Shooting]] || [[KAGRA/Subgroups/VIS/ModelPlotter|ModelPlotter]] || ||[[KAGRA/Subgroups/VIS/OldVISMeetings|Old VISMeeting]]||[[https://github.com/gw-vis|Github Repository]] || [[KAGRA/Subgroups/VIS/OpsManual/DGSMaintainance| DGSMaintainance]] ||[[KAGRA/Subgroups/VIS/CRYInterfaces|CRY interface]] || || [[KAGRA/Subgroups/VIS/OpsManual/AutoMeasurement|AutoMeasurement]] || || --- || --- || --- || --- || --- || [[KAGRA/Subgroups/VIS/OpsManual/SuspensionControlModeling|SuspensionControlModeling]] || || --- || --- || --- || --- || --- || [[KAGRA/Subgroups/VIS/Kontrol|Kontrol]] || || --- || --- || --- || --- || --- || [[KAGRA/Subgroups/VIS/VISHack|VIS Health Check]] || |
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| ||<#89C3EB |2 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]] || || [[KAGRA/Subgroups/VIS/Optics/ETMX|ETMX]] || [[KAGRA/Subgroups/VIS/Optics/ETMY|ETMY]] || [[KAGRA/Subgroups/VIS/Optics/ITMX|ITMX]] || [[KAGRA/Subgroups/VIS/Optics/ITMY|ITMY]] || [[KAGRA/Subgroups/VIS/Optics/BS|BS]] || [[KAGRA/Subgroups/VIS/Optics/SRM|SRM]] || [[KAGRA/Subgroups/VIS/Optics/SR2|SR2]] ||[[KAGRA/Subgroups/VIS/Optics/SR3|SR3]] || [[KAGRA/Subgroups/VIS/Optics/PRM|PRM]] || [[KAGRA/Subgroups/VIS/Optics/PR2|PR2]] || [[KAGRA/Subgroups/VIS/Optics/PR3|PR3]] || ||<:-11> || ||<#89C3EB |2 style="text-align:center; "> '''Short suspensions''' ||<:-8> [[KAGRA/Subgroups/VIS/Type-C|Type-C]]||<:-2> [[KAGRA/Subgroups/VIS/TMS-VIS|TMS-VIS]] || || [[KAGRA/Subgroups/VIS/Optics/MCE|MCE]] || [[KAGRA/Subgroups/VIS/Optics/MCI|MCI]] || [[KAGRA/Subgroups/VIS/Optics/MCO|MCO]] || [[KAGRA/Subgroups/VIS/Optics/IMMT1|IMMT1]] || [[KAGRA/Subgroups/VIS/Optics/IMMT2|IMMT2]] || [[KAGRA/Subgroups/VIS/Optics/OMMT1|OMMT1]] || [[KAGRA/Subgroups/VIS/Optics/OMMT2|OMMT2]] || [[KAGRA/Subgroups/VIS/Optics/OSTM|OSTM]] || [[KAGRA/Subgroups/VIS/Optics/TMSX|TMSX]] || [[KAGRA/Subgroups/VIS/Optics/TMSY|TMSY]] || |
||<#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]] || [[KAGRA/Subgroups/VIS/Daily Operations|Daily Operations]] || |
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| ||<#89C3EB style="text-align:center; "> '''Mass components''' ||<#89C3EB style="text-align:center; "> '''Sensors''' ||<#89C3EB style="text-align:center; "> '''Actuators/Motors''' ||<#89C3EB style="text-align:center; "> '''AEL related''' ||<#89C3EB style="text-align:center; "> '''DGS related''' || || [[KAGRA/Subgroups/VIS/Mechanics/Pre-Isolator|Pre-Isolator]] || [[KAGRA/Subgroups/VIS/Sensors/LVDT|LVDT]] || [[KAGRA/Subgroups/VIS/Actuators/VoiceCoilActuator|Voice Coil Actuator]] || |
/!\ [April 28. 2020] Miyo is cleaning up the VIS wiki pages. Progress is posted [[https://github.com/gw-vis/kagra-vis/issues/18|here]]. |
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| ---- == VIS Upgrades == |
----- === Old (Please arrange me) === |
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| [[KAGRA/Subgroups/VIS/Upgrade|Upgrade Page]] | * [[KAGRA/Subgroups/VIS/IstManual|Procedure]] * [[KAGRA/Subgroups/VIS/VISInstWorkInfo|Misc.]] * [[KAGRA/Subgroups/VIS/OpsManual|Manual]] * [[KAGRA/Subgroups/VIS/Upgrade|Upgrade]] * [[KAGRA/Subgroups/VIS/OpsManual/HealthCheck|HealthCheck]] * [[KAGRA/Subgroups/VIS/OpsManual/TypeA|OpsManual-TypeA|]] * [[KAGRA/Subgroups/VIS/OpsManual/TypeB|OpsManual-TypeB|]] * [[KAGRA/Subgroups/VIS/OpsManual/TypeBp|OpsManual-TypeBp|]] * [[KAGRA/Subgroups/VIS/OpsManual/TypeC|OpsManual-TypeC|]] |
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| ---- == 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<<FootNote(Please mind also that we call the vacuum chambers or clean booths in a similar manner.)>> 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 (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''' ---- == Signal processing == . ''Related subgroups'': [[KAGRA/Subgroups/AEL|AEL]], [[KAGRA/Subgroups/DGS|DGS]] 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 === . ''See also:'' [[KAGRA/Subgroups/VIS|Real-time model development]] === === ---- == Apps == ---- == 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]] ---- == 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)>> |
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Vibration Isolation System (VIS)
Subsystem Definition
- This subsystem makes vibration isolation for all optics used in KAGRA.
- Requirement of displacement of the test mass mirrors must be less than 4x10^-20m/rtHz at 10Hz. RMS motion must be less than 0.1 um as displacement and 0.1 um/s as velocity. （please note that it is old information）
Reference JGW-T1100365-v2
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[April 28. 2020] Miyo is cleaning up the VIS wiki pages. Progress is posted here.
Old (Please arrange me)