Differences between revisions 41 and 253 (spanning 212 versions)

VIS

Vibration Isolation System is the hardware infrastructure for the main optics in the KAGRA interferometer. The VIS subgroup works for ...

Meetings	Managements
Weekly VIS Meeting	Schedule
Extraordinary Meetings

Tall suspensions	Type-A				Type-B				Type-Bp
Tall suspensions	ETMX	ETMY	ITMX	ITMY	BS	SRM	SR2	SR3	PRM	PR2	PR3

Short suspensions	Type-C								TMS-VIS
Short suspensions	MCE	MCI	MCO	IMMT1	IMMT2	OMMT1	OMMT2	OSTM	TMSX	TMSY

Mechanics	Sensors	Actuators/Motors	Other subsystem interfaces	Apps
Pre-Isolator	LVDT	Voice Coil Actuator	AEL interfaces

VIS Upgrades

Upgrade Page

Instruments

Suspension types

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 41 as of 2009-08-06 10:11:07 → 
  Size: 1963
  Editor: RyutaroTakahashi
  Comment:
+   ← Revision 253 as of 2020-03-11 13:41:41 → ⇥
  Size: 6595
  Editor: KokiOkutomi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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-||'''[[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

= VIS =

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

||<#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]] ||  ||

||<#1e50a2 |2 style="color:#ffffff; text-align:center;"> '''Tall suspensions''' ||<:-4 style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/TypeA|Type-A]] ||<:-4 style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/TypeB|Type-B]] ||<:-3 style="font-weight:bold;"> [[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 |2 style="color:#ffffff; text-align:center;"> '''Short suspensions''' ||<:-8 style="font-weight:bold;"> [[KAGRA/Subgroups/VIS/Type-C|Type-C]]||<:-2 style="font-weight:bold;"> [[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;"> '''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;"> '''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]] || [[KAGRA/Subgroups/VIS/AELInterfaces|AEL interfaces]] || ||

----
== 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]]
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+Line 123:
-<<TableOfContents(3)>>
-Line 6:
+Line 124:
-== 防振系 ==
 . 常温防振＋ヒートリンク＋低温懸架
 . リーダー： 高橋竜太郎 (NAOJ)
 . サブリーダー： 内山隆 (ICRR)、三代木伸二 (ICRR)
+===  ===
-Line 11:
+Line 126:
-=== 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/Modeling2.ppt|LCGT-SAS Modeling 2]]
 . [[attachment:LCGT/subgroup/vis/RandD2.pdf|低温懸架のR&Dについて]]
-Line 16:
+Line 127:
-=== 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/Modeling1.ppt|LCGT-SAS Modeling]]
 . [[attachment:LCGT/subgroup/vis/RandD.pdf|LCGT-SASのR&Dについて]]
+----
== Apps ==
-Line 21:
+Line 130:
-=== 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)
-Line 28:
+Line 131:
-=== TAMA SAS の問題点 ===
 . [[LCGT/subgroup/vis/tama_sas|Item list to be improved]]
+----
== Installation ==
 . [[KAGRA/Subgroups/VIS/IstManual|Installation Procedure]]
 . [[KAGRA/Subgroups/VIS/VISInstWorkInfo|Misc. Installation Work Information]]
-Line 31:
+Line 136:
-=== TAMA Double Pendulum の問題点 ===
 . [[LCGT/subgroup/vis/tama_double|Item list to be improved]]
+ . [[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]]
-Line 34:
+Line 144:
-=== 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]]
+----
== VIS Introductioon ==
 . [[KAGRA/Subgroups/VIS/Introduction|Introduction materials for VIS]]
-Line 38:
+Line 148:
-=== Transfer function X0~7/Xg in the LCGT-SAS model ===
 . [[attachment:LCGT/subgroup/vis/model_trf.txt|TRF]]
+----
== 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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