Differences between revisions 76 and 230 (spanning 154 versions)

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

Large suspensions	Type-A				Type-B				Type-Bp
Optics	ETMX	ETMY	ITMX	ITMY

Type-C

Contents

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

Related subgroups: AEL, 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: Real-time model development

Apps

Installation

Real Time Model Development

Real-time Model Development

Operation

Operation Manual

VIS Introductioon

Introduction materials for VIS

VIS Commissioning

Type-A Commissioning

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]

Please mind also that we call the vacuum chambers or clean booths in a similar manner. (1)
This abbreviation should be avoided because it often refers to rather transfer function. (2)

-  ⇤ ← Revision 76 as of 2011-02-24 14:16:59 → 
  Size: 3708
  Editor: RyutaroTakahashi
  Comment:
+   ← Revision 230 as of 2020-03-06 13:08:36 → ⇥
  Size: 4799
  Editor: KokiOkutomi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
-||'''[[LCGT|PROJECT TOP]]''' ||[[LCGT/subgroup/analysis|GW Analysis]] ||[[LCGT/subgroup/ifo|Interferometer]] ||[[LCGT/subgroup/vacuum|Vacuum & Cryostat]] ||[[LCGT/subgroup/laser|Laser & Optics]] ||[[LCGT/subgroup/vis|Seismic Isolator]] ||[[LCGT/subgroup/infra|Infrastructure]] ||
+## page was renamed from LCGT/subgroup/vis
 Line 3:
+= VIS =

'''V'''ibration '''I'''solation '''S'''ystem is the hardware infrastructure for the main optics in the KAGRA interferometer. 

 * '''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; "> '''Large 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]] ||

||<|4> [[KAGRA/Subgroups/VIS/Type-C|Type-C]] || ||
|| ||
|| ||
|| ||
|| ||
-Line 6:
+Line 23:
-== 防振系 ==
 . リーダー： 高橋竜太郎 (NAOJ)
-Line 9:
+Line 24:
-=== 第6回LCGT防振系作業部会 ===
 . 11月12日(木) 15:00-16:30 天文台輪講室
 . [[attachment:LCGT/subgroup/vis/Modeling6.ppt|Model vs. Measurement in TAMA-SAS]]
 . [[attachment:LCGT/subgroup/vis/chamber-AB.pdf|Design of Type-A,B chamber (rev.)]]
+----
== VIS Upgrades ==
-Line 14:
+Line 27:
-=== 第5回LCGT防振系作業部会 ===
 . --(10月8日(木) 15:00-16:30 天文台輪講室)--
 . 10月15日(木) 13:00-14:30 天文台大会議室 ([[attachment:LCGT/subgroup/vis/minutes5.pdf|議事録]])
 . [[attachment:LCGT/subgroup/vis/Modeling5.ppt|LCGT-SAS Modeling 5 (Type-B,C)]]
 . [[attachment:LCGT/subgroup/vis/chamber-A.pdf|Design of Type-A chamber]]
+[[KAGRA/Subgroups/VIS/Upgrade|Upgrade Page]]
-Line 20:
+Line 29:
-=== LCGT防振系作業部会ブレーンストーミング ===
 . 10月1日(木) 13:00-15:00 東京大学理学部１号館445号室 ([[attachment:LCGT/subgroup/vis/minutes-b.pdf|議事録]])
 . [[attachment:LCGT/subgroup/vis/brest.pdf|メモ]]
+----
== Instruments ==
-Line 24:
+Line 32:
-=== 第4回LCGT防振系作業部会 ===
 . 9月3日(木) 15:00-16:30 天文台輪講室 ([[attachment:LCGT/subgroup/vis/minutes4.pdf|議事録]])
 . [[attachment:LCGT/subgroup/vis/Modeling3.ppt|LCGT-SAS Modeling 3 (Gain boost)]]
 . [[attachment:LCGT/subgroup/vis/Modeling4.pdf|LCGT-SAS Modeling 4 (Vertical, Pitch)]]
 . [[attachment:LCGT/subgroup/vis/ICDsas2.doc|ICD update]] ([[attachment:ICDsas2.pdf|PDF]])
+=== Suspension types ===
-Line 30:
+Line 34:
-=== 第3回LCGT防振系作業部会 ===
 . 8月6日(木) 15:00-16:30 天文台輪講室 ([[attachment:LCGT/subgroup/vis/minutes3.pdf|議事録]])
 . [[attachment:LCGT/subgroup/vis/Modeling2.ppt|LCGT-SAS Modeling 2]]
 . [[attachment:LCGT/subgroup/vis/RandD2.pdf|低温懸架のR&Dについて]]
+[[KAGRA/Subgroups/VIS/Type-C|Type-C]]
-Line 35:
+Line 36:
-=== 第2回LCGT防振系作業部会 ===
 . 7月16日(木) 15:00-16:30 天文台輪講室 ([[attachment:LCGT/subgroup/vis/minutes2.pdf|議事録]])
 . [[attachment:LCGT/subgroup/vis/Modeling1.ppt|LCGT-SAS Modeling]]
 . [[attachment:LCGT/subgroup/vis/RandD.pdf|LCGT-SASのR&Dについて]]
+[[KAGRA/Subgroups/VIS/Payload|Payload]]
-Line 40:
+Line 38:
-=== 第1回LCGT防振系作業部会 ===
 . 6月3日(水) 17:00-19:00 天文台輪講室 ([[attachment:LCGT/subgroup/vis/minutes1.pdf|議事録]])
 . [[attachment:LCGT/subgroup/vis/agenda1.pdf|作業班、スケジュール]]
 . [[attachment:LCGT/subgroup/vis/ICDsas.doc|ICD]] ([[attachment:ICDsas.pdf|PDF]])
 . [[attachment:LCGT/subgroup/vis/LCGT-SAS2.pdf|常温-低温接続部]]
 . R&Dについて (次回)
+[[KAGRA/Subgroups/VIS/ActuatorDesign|Actuator design summary]]
-Line 47:
+Line 40:
-=== TAMA SAS の問題点 ===
 . [[attachment:LCGT/subgroup/vis/Report2009.ppt|Evaluation of TAMA-SAS for LCGT]]
 . [[attachment:tama_sas.pdf|Drawings of TAMA SAS]]
 . [[LCGT/subgroup/vis/tama_sas|Item list to be improved]]
+[[KAGRA/Subgroups/VIS/ChangeLog|Design Change Logs]]
-Line 52:
+Line 42:
-=== TAMA Double Pendulum の問題点 ===
 . [[LCGT/subgroup/vis/tama_double|Item list to be improved]]
+=== Suspended optics ===
-Line 55:
+Line 44:
-=== Seismic spectrum in Kamioka mine ===
 . [[attachment:LCGT/subgroup/ifo/SPI/HeatLink/0702seis_Araya.zip|In loud day]] (This data should be used as nominal ground motion in Kamioka)
 . [[attachment:CLIO/NoiseBudgets/seismic/cryo_seismic.txt|In cryostat]]
+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.
-Line 59:
+Line 47:
-=== LCGT-SAS model ===
 . Transfer function X0~X7/Xg --([[attachment:LCGT/subgroup/vis/model_trf.txt|(old)]])--
 . Modeling M-file --([[attachment:LCGT/subgroup/vis/model_mfile.zip|(2009/8/15)]])--[[attachment:LCGT/subgroup/vis/model_mfile2.zip|(2009/8/17)]]
 . Spectrum of displacement --([[attachment:LCGT/subgroup/vis/model_disp.zip|(2009/8/15)]])--[[attachment:LCGT/subgroup/vis/model_disp2.zip|(2009/8/17)]]
+ * 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]

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