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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. The VIS subgroup works for ... |
||<#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]] || || || |
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| ||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Meetings'''||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Managements'''|| ||[[KAGRA/Subgroups/VIS/MeetingNAOJ|Weekly VIS Meeting]] || [[KAGRA/Subgroups/VIS/Schedule|Schedule]] || ||[[KAGRA/Subgroups/VIS/ExtraMeetings|Extraordinary Meetings]] || || |
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| ||<#1e50a2 style="color:#ffffff; 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> || ||<#1e50a2 style="color:#ffffff; 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]] || |
||<#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;"> '''Control'''||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Apps''' ||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Links''' || ||<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/Control/General|General concept]] || [[KAGRA/Subgroups/VIS/Apps/SUMCON|SUMCON]] || LIGO [[https://awiki.ligo-wa.caltech.edu/wiki/Seismic_Isolation| SEI]], [[https://awiki.ligo-wa.caltech.edu/wiki/Suspensions|SUS]] || ||<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? || - || [[KAGRA/Subgroups/VIS/Apps/ModelPlotter|ModelPlotter]] || [[https://alog.ligo-la.caltech.edu/SEI/index.php?content=1| SEI log]], [[https://alog.ligo-wa.caltech.edu/aLOG/index.php?content=1|LHO log]], [[https://alog.ligo-la.caltech.edu/aLOG/|LLO log]], [[https://logbook.virgo-gw.eu/virgo/|Virgo log]] || ||<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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| ||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Mass components''' ||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Sensors''' ||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Actuators/Motors''' ||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Other subsystem interfaces''' ||<#1e50a2 style="color:#ffffff; text-align:center;"> '''Apps''' || || [[KAGRA/Subgroups/VIS/Mechanics/Pre-Isolator|Pre-Isolator]] || [[KAGRA/Subgroups/VIS/Sensors/LVDT|LVDT]] || [[KAGRA/Subgroups/VIS/Actuators/VoiceCoilActuator|Voice Coil Actuator]] || |
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| ---- == VIS Upgrades == |
== Definition and scope == 1. xxxxx 2. yyyyy |
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| [[KAGRA/Subgroups/VIS/Upgrade|Upgrade Page]] | |
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| === 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. |
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=== === |
Vibration Isolation System (VIS)
Meetings |
Management |
Other subsystem interfaces |
User topics |
Developer topics |
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Suspensions |
Mechanics |
Sensors |
Actuators/Motors |
Control |
Apps |
Links |
Solenoid actuator? |
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Definition and scope
- xxxxx
2. yyyyy
Instruments
Suspension types
Real-time front-end model
See also: Real-time model development
Apps
Installation
Real Time Model Development
Operation
VIS Introductioon
VIS Commissioning
Archives
Old Weekly EVO Meeting
- This meeting is suspended.
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]