The optics in the KAGRA interferometer is often called their acronyms/abbreviations. Please mind also that we call the vacuum chambers or clean booths in a similar manner.

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 (TF¹)
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)

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]

This abbreviation should be avoided because it often refers to rather Transfer Function. (1)

-  ⇤ ← Revision 154 as of 2012-09-27 13:16:27 → 
  Size: 7674
  Editor: KazuhiroYamamoto
  Comment:
+   ← Revision 198 as of 2020-02-28 12:30:54 → ⇥
  Size: 3373
  Editor: KokiOkutomi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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+= VIS =

'''V'''ibration '''I'''solation '''S'''ystem is the hardware infrastructure for the main optics in the KAGRA interferometer.
-Line 4:
+Line 9:
-== Vibration Isolation ==
 . Chief： R. Takahashi(ICRR)
 . Member： T. Uchiyama(ICRR), R. DeSalvo(Univ. of Sannio), H. Ishizaki(NAOJ), A. Takamori(ERI), E. Majorana(INFN), T. Sekiguchi(ICRR), K. Yamamoto(ICRR)
+== Space for VIS-internal use ==

=== Quick announcement ===

=== Frequently used links ===
 * '''VIS meeting''': From 14:00 (JST) on every Friday - [[KAGRA/Subgroups/VIS/MeetingNAOJ|Meeting Page]]
-Line 9:
+Line 17:
-== Weekly EVO Meeting ==
 . Every Wednesday, 21:00(JST)
+== VIS Upgrades ==
-Line 12:
+Line 19:
-=== The ??th (19 September, 2012) ===
 . No meeting

=== The ??th (12 September, 2012) ===
 . [[attachment:KAGRAvi_minute_2012Sep12.txt|Minute]]

=== The ??th (5 September, 2012) ===
 . [[attachment:KAGRAvi_minute_2012Sep05.txt|Minute]]

=== The ??th (29 August, 2012) ===
 . [[attachment:KAGRAvi_minute_2012Aug29.txt|Minute]]

=== The ??th (22 August, 2012) ===
 . [[attachment:KAGRAvi_minute_2012Aug22.txt|Minute]]

=== The ??th (15 August, 2012) ===
 . No meeting (summer vacation)

=== The ??th (8 August, 2012) ===
 . [[attachment:KAGRAvi_minute_2012Aug08.txt|Minute]]

=== The ??th (1 August, 2012) ===
 . [[attachment:KAGRAvi_minute_2012Aug01.txt|Minute]]

=== The 24th (28 September, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/modal_0928.pdf|Modal Analysis of Tripod by Takanori]]

=== The 23th (15 September, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/TypeB_sim_0915.pdf|Simulation on TypeB by Takanori]]

=== The 22th (7 September, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/Type-B_system_rycy.pdf|Z-Assembly for RM by Riccardo]]
 . [[attachment:KAGRA/Subgroups/VIS/Type-B_system_bs.pdf|Z-Assembly for BS by Riccardo]]
 . [[attachment:KAGRA/Subgroups/VIS/TypeB_sim_0907.pdf|Simulation on TypeB by Takanori]]

=== The 21th (31 August, 2011) ===
=== The 20th (24 August, 2011) ===
=== The 19th (10 August, 2011) ===
=== The 18th (27 July, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/PayloadB_0727.pdf|Design of Type-B payload by Riccardo]]

=== The 17th (20 July, 2011) ===
=== The 16th (13 July, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/SR2-PR2_0711.pdf|SR2-PR2 recoil mass by Riccardo]]
 . [[attachment:KAGRA/Subgroups/VIS/angle_0713.pdf|Angular fluctuation of TM by Takanori]]

=== The 15th (6 July, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/2type_0701.pdf|Type-B payload model by Sekiguchi]]

=== The 14th (29 June, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/kapton_0627.pdf|Kapton Wire by Sekiguchi]]

=== The 13th (22 June, 2011) ===
 . [[http://tamago.mtk.nao.ac.jp/ishizaki/LCGT/kaptonwire/cable.pdf|Kapton Wire by Ishizaki]]

=== The 12th (15 June, 2011) ===
=== The 11th (8 June, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/minute0608.pdf|Minute]]

=== The 10th (1 June, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/damping0601.pdf|Mode damping study by Takanori]]

=== The 9th (25 May, 2011) ===
=== The 8th (18 May, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/magicwand.png|Magic wands by Takanori]]
 . [[attachment:KAGRA/Subgroups/VIS/Check110512.pdf|Heavier test mass by Ettore and Takanori]]

=== The 7th (11 May, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/rep110511.pdf|Report by Takanori]]

=== The 6th (27 April, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/dimension110427.docx|Payload dimensions by Riccardo]]

=== The 5th (20 April, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/3D_model.pdf|Parameter Configuration by Ettore]]

=== (11 April, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/LCGT_PAY_10-30.pdf|Parameter Configuration by Ettore]]

=== The 4th (6 April, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/10-30_April06.docx|Simulation by Ettore]]
 . [[attachment:KAGRA/Subgroups/VIS/sequence110406.pdf|Installation sequence by Riccardo]]

=== The 3rd (30 March, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/coordinate110330.pdf|Coordinate system by Ryutaro]]
 . [[attachment:KAGRA/Subgroups/VIS/110330_isasA.pdf|Simulation by Takanori]]

=== The 2nd (23 March, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/memo110323.txt|Comments by Riccardo]]
 . [[attachment:KAGRA/Subgroups/VIS/report110323.doc|Status report by Riccardo]]
 . [[attachment:KAGRA/Subgroups/VIS/sim110323.pptx|Simulation by Ettore]]

=== The 1st (16 March, 2011) ===
 . [[attachment:KAGRA/Subgroups/VIS/Tower-a.pdf|Design for Type-A system]]
 . [[attachment:KAGRA/Subgroups/VIS/filter-chain.pdf|Detail of filter's chain]]
+[[KAGRA/Subgroups/VIS/Upgrade|Upgrade Page]]
-Line 109:
+Line 22:
-== LCGT防振系作業部会(2009) ==
=== 第6回 ===
 . 11月12日(木) 15:00-16:30 天文台輪講室
 . [[attachment:KAGRA/Subgroups/VIS/Modeling6.ppt|Model vs. Measurement in TAMA-SAS]]
 . [[attachment:KAGRA/Subgroups/VIS/chamber-AB.pdf|Design of Type-A,B chamber (rev.)]]
+== Instruments ==
-Line 115:
+Line 24:
-=== 第5回 ===
 . 10月15日(木) 13:00-14:30 天文台大会議室 ([[attachment:KAGRA/Subgroups/VIS/minutes5.pdf|議事録]])
 . [[attachment:KAGRA/Subgroups/VIS/Modeling5.ppt|LCGT-SAS Modeling 5 (Type-B,C)]]
 . [[attachment:KAGRA/Subgroups/VIS/chamber-A.pdf|Design of Type-A chamber]]
+=== Suspension types ===
[[KAGRA/Subgroups/VIS/TypeA|Type-A]]
-Line 120:
+Line 27:
-=== 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:KAGRA/Subgroups/VIS/minutes-b.pdf|議事録]])
 . [[attachment:KAGRA/Subgroups/VIS/brest.pdf|メモ]]
+[[KAGRA/Subgroups/VIS/TypeB|Type-B]]
-Line 124:
+Line 29:
-=== 第4回 ===
 . 9月3日(木) 15:00-16:30 天文台輪講室 ([[attachment:KAGRA/Subgroups/VIS/minutes4.pdf|議事録]])
 . [[attachment:KAGRA/Subgroups/VIS/Modeling3.ppt|LCGT-SAS Modeling 3 (Gain boost)]]
 . [[attachment:KAGRA/Subgroups/VIS/Modeling4.pdf|LCGT-SAS Modeling 4 (Vertical, Pitch)]]
 . [[attachment:KAGRA/Subgroups/VIS/ICDsas2.doc|ICD update]] ([[attachment:ICDsas2.pdf|PDF]])
+[[KAGRA/Subgroups/VIS/TypeBp|Type-Bp]]
-Line 130:
+Line 31:
-=== 第3回 ===
 . 8月6日(木) 15:00-16:30 天文台輪講室 ([[attachment:KAGRA/Subgroups/VIS/minutes3.pdf|議事録]])
 . [[attachment:KAGRA/Subgroups/VIS/Modeling2.ppt|LCGT-SAS Modeling 2]]
 . [[attachment:KAGRA/Subgroups/VIS/RandD2.pdf|低温懸架のR&Dについて]]
+[[KAGRA/Subgroups/VIS/Type-C|Type-C]]
-Line 135:
+Line 33:
-=== 第2回 ===
 . 7月16日(木) 15:00-16:30 天文台輪講室 ([[attachment:KAGRA/Subgroups/VIS/minutes2.pdf|議事録]])
 . [[attachment:KAGRA/Subgroups/VIS/Modeling1.ppt|LCGT-SAS Modeling]]
 . [[attachment:KAGRA/Subgroups/VIS/RandD.pdf|LCGT-SASのR&Dについて]]
+[[KAGRA/Subgroups/VIS/Payload|Payload]]
-Line 140:
+Line 35:
-=== 第1回 ===
 . 6月3日(水) 17:00-19:00 天文台輪講室 ([[attachment:KAGRA/Subgroups/VIS/minutes1.pdf|議事録]])
 . [[attachment:KAGRA/Subgroups/VIS/agenda1.pdf|作業班、スケジュール]]
 . [[attachment:KAGRA/Subgroups/VIS/ICDsas.doc|ICD]] ([[attachment:ICDsas.pdf|PDF]])
 . [[attachment:KAGRA/Subgroups/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]]

[[KAGRA/Subgroups/VIS/ChangeLog|Design Change Logs]]

=== Suspended optics ===

The optics in the KAGRA interferometer is often called their acronyms/abbreviations. Please mind also that we call the vacuum chambers or clean booths in a similar manner.

 * 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)
-Line 148:
+Line 92:
-== Archive ==
=== TAMA SAS ===
 . [[attachment:KAGRA/Subgroups/VIS/Report2009.ppt|Evaluation of TAMA-SAS for LCGT]]
 . [[attachment:tama_sas.pdf|Drawings of TAMA SAS]]
 . [[KAGRA/Subgroups/VIS/FEM/tama_sas|Item list to be improved]]
+== Installation ==
 . [[KAGRA/Subgroups/VIS/IstManual|Installation Procedure]]
 . [[KAGRA/Subgroups/VIS/VISInstWorkInfo|Misc. Installation Work Information]]
-Line 154:
+Line 96:
-=== TAMA Double Pendulum ===
 . [[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 157:
+Line 104:
-=== 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 161:
+Line 108:
-=== LCGT-SAS model ===
 . Transfer function X0~X7/Xg --([[attachment:KAGRA/Subgroups/VIS/model_trf.txt|(old)]])--
 . Modeling M-file --([[attachment:KAGRA/Subgroups/VIS/model_mfile.zip|(2009/8/15)]])--[[attachment:KAGRA/Subgroups/VIS/model_mfile2.zip|(2009/8/17)]]
 . Spectrum of displacement --([[attachment:KAGRA/Subgroups/VIS/model_disp.zip|(2009/8/15)]])--[[attachment:KAGRA/Subgroups/VIS/model_disp2.zip|(2009/8/17)]]
-Line 166:
+Line 109:
-=== Finite Element Analysis ===
 . [[KAGRA/Subgroups/VIS/FEM|FEM Page]]
+----
== VIS Commissioning ==
 . [[KAGRA/Subgroups/VIS/Type-A/Commissioning|Type-A Commissioning]]
-Line 169:
+Line 113:
-=== Rigid-Body Models ===
 . [[KAGRA/Subgroups/VIS/Simulation|Simulation Page]]
+----
== 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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