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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;"> '''User topics'''||<#a31f52 style="color:#ffffff; text-align:center;"> '''Developer topics''' || ||[[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/Upgrade|Upgrade]] || ||[[KAGRA/Subgroups/VIS/ExtraMeetings|Extraordinary meetings]] || || [[KAGRA/Subgroups/VIS/DGSInterfaces|DGS interfaces]] || ||[[KAGRA/Subgroups/VIS/Introduction|VIS Introduction]] || ||[[KAGRA/Subgroups/VIS/OldVISMeetings|Old VISMeeting]] || || || || || |
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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;"> '''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/Geophone|Geophone]] || [[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/IP|Inverted pendulum (IP)]] || [[KAGRA/Subgroups/VIS/Sensors/Accelerometer|Accelerometer]] || Solenoid actuator? || - || - || ||<style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/TypeBp|Type-Bp]] ||└ [[KAGRA/Subgroups/VIS/Mechanics/TopGAS|Top GAS filter]] || [[KAGRA/Subgroups/VIS/Sensors/LVDT|LVDT]] || [[KAGRA/Subgroups/VIS/Motors/FishingRod|Fishing rod]] || - || - || ||<style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/Type-C|Type-C]] || [[KAGRA/Subgroups/VIS/Mechanics/StandardGAS|Standard GAS filter (SF)]] ||└ [[KAGRA/Subgroups/VIS/Sensors/BFLVDT|BF LVDT]] ||└ [[KAGRA/Subgroups/VIS/Motors/StepperMotor|Stepper motor]] || - || - || ||<style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/TypeA|Type-A]] || [[KAGRA/Subgroups/VIS/Mechanics/BottomGAS|Bottom GAS filter (BF)]] ||<-2 style="text-align:center;"> [[KAGRA/Subgroups/VIS/Sensors/OSEM|OSEM]] || - || - || ||<style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/TMS-VIS|TMS-VIS]] || [[KAGRA/Subgroups/VIS/Mechanics/MagneticDamper|Magnetic damper]] || [[KAGRA/Subgroups/VIS/Sensors/PhotoReflSensor|Photo-reflective sensor]] || [[KAGRA/Subgroups/VIS/Motors/Picomotor|Picomotor]] || - || - || || ---|| [[KAGRA/Subgroups/VIS/Mechanics/MaragingWire|Maraging wire]] || [[KAGRA/Subgroups/VIS/Sensors/OpLev|Optical Lever (OpLev)]] || - || - || - || |
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| ||<style="text-align:center; "> '''Suspension types''' ||<style="text-align:center; "> '''Optics''' || ||<|4> [[KAGRA/Subgroups/VIS/TypeA|Type-A]] || || || || || || || || ||<|4> [[KAGRA/Subgroups/VIS/TypeB|Type-B]] || || || || || || || || ||<|4> [[KAGRA/Subgroups/VIS/TypeBp|Type-Bp]] || || || || || || || || ||<|4> [[KAGRA/Subgroups/VIS/Type-C|Type-C]] || || || || || || || || || <<TableOfContents(3)>> |
||<#52a31f style="color:#ffffff; text-align:center;"> '''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;"> '''Apps''' ||<#52a31f style="color:#ffffff; text-align:center;"> '''Links, Misic.''' || || Suspension Design || [[KAGRA/Subgroups/VIS/IstManual|Procedure]] || --- ||[[KAGRA/Subgroups/VIS/OpsManual|Manual]]||[[KAGRA/Subgroups/VIS/Apps/SUMCON|SUMCON]] || Wiki [[https://awiki.ligo-wa.caltech.edu/wiki/Seismic_Isolation| SEI]], [[https://awiki.ligo-wa.caltech.edu/wiki/Suspensions|SUS]] || || [[KAGRA/Subgroups/VIS/ActuatorDesign|Actuator Design]] || [[KAGRA/Subgroups/VIS/VISInstWorkInfo|Misc.]] || --- || --- || [[KAGRA/Subgroups/VIS/Apps/ModelPlotter|ModelPlotter]] || 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]] || == Definition and scope == 1. xxxxx 2. yyyyy |
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| ---- == VIS Upgrades == [[KAGRA/Subgroups/VIS/Upgrade|Upgrade Page]] ---- == Instruments == === Suspension types === [[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)>> |
----- Currently, I clean up the VIS wiki pages. Progress is posted [[https://github.com/gw-vis/kagra-vis/issues/18|here]]. |
Vibration Isolation System (VIS)
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Design |
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Definition and scope
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Currently, I clean up the VIS wiki pages. Progress is posted here.