Differences between revisions 238 and 301 (spanning 63 versions)

Vibration Isolation System (VIS)

Meetings	Management	Other subsystem interfaces	User topics	Developer topics
Weekly VIS meeting	Schedule	AEL interfaces	Bug Reports	Upgrade
Extraordinary meetings		DGS interfaces
Old VISMeeting

Suspensions	Mechanics	Sensors	Actuators/Motors	Control
Type-A	Pre-Isolator	Geophone	Voice coil actuator	General concept
Type-B	├ Inverted pendulum (IP)	Accelerometer	Solenoid actuator?	-
Type-Bp	└ Top GAS filter	LVDT	Fishing rod	-
Type-C	Standard GAS filter (SF)	└ BF LVDT	└ Stepper motor	-
Type-A	Bottom GAS filter (BF)	OSEM		-
TMS-VIS	Magnetic damper	Photo-reflective sensor	Picomotor	-
---	Maraging wire	Optical Lever (OpLev)	-	-

Design	Installation	Commissioning	Apps	Links
Suspension Desgin	---	---	SUMCON	LIGO SEI, SUS
Actuator design summary	---	---	ModelPlotter	SEI log, LHO log, LLO log, Virgo log

Definition and scope

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-  ⇤ ← Revision 238 as of 2020-03-10 13:35:13 → 
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+   ← Revision 301 as of 2020-04-28 17:30:58 → ⇥
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-Deletions are marked like this.
+Additions are marked like this.
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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/OldVISMeetings|Old VISMeeting]] || || || || ||
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+Line 10:
- * '''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;"> '''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/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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+Line 19:
-||<#89C3EB style="texxt-align:center;"> '''Meetings'''||
||[[KAGRA/Subgroups/VIS/MeetingNAOJ|VIS Meeting]] ||
+||<#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;"> '''Apps''' ||<#52a31f  style="color:#ffffff; text-align:center;"> '''Links''' ||
|| Suspension Desgin || --- || --- || [[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]] ||
|| [[KAGRA/Subgroups/VIS/ActuatorDesign|Actuator design summary]] || --- || --- ||  [[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]] ||
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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> 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]] ||
+== Definition and scope ==
 1. xxxxx
 2. yyyyy
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-||<|4> [[KAGRA/Subgroups/VIS/Type-C|Type-C]] || ||
|| ||
|| ||
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<<TableOfContents(3)>>


----
== 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<<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 ==


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== 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]]

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== VIS Introductioon ==
 . [[KAGRA/Subgroups/VIS/Introduction|Introduction materials for VIS]]


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== VIS Commissioning ==
 . [[KAGRA/Subgroups/VIS/Type-A/Commissioning|Type-A Commissioning]]



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== Archives ==
 . [[KAGRA/Subgroups/VIS/Photos|Photos]]

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== 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]
+---------
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