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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 |
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| = 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; "> '''Suspension types''' ||<:-4> [[KAGRA/Subgroups/VIS/TypeA|Type-A]]||<:-4> [[KAGRA/Subgroups/VIS/TypeB|Type-B]] ||<:-3> [[KAGRA/Subgroups/VIS/TypeBp|Type-Bp]] || ||<#89C3EB 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]] || || || || || || || || || || |
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| == 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) |
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| === 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/Modeling5.ppt|LCGT-SAS Modeling 5 (Type-B,C)]] |
---- == VIS Upgrades == |
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| === 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]] |
[[KAGRA/Subgroups/VIS/Upgrade|Upgrade Page]] |
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| === 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]]) |
---- == Instruments == |
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| === 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]] |
=== Suspension types === |
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| === 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/Type-C|Type-C]] |
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| === 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/Payload|Payload]] |
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| === TAMA SAS の問題点 === . [[attachment:tama_sas.pdf|Drawings of TAMA SAS]] . [[LCGT/subgroup/vis/tama_sas|Item list to be improved]] |
[[KAGRA/Subgroups/VIS/ActuatorDesign|Actuator design summary]] |
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| === TAMA Double Pendulum の問題点 === . [[LCGT/subgroup/vis/tama_double|Item list to be improved]] |
[[KAGRA/Subgroups/VIS/ChangeLog|Design Change Logs]] |
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| === 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]] |
=== Suspended optics === |
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| === 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)]] |
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 == ---- == 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] <<Navigation(children)>> |
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 |
Contents
VIS Upgrades
Instruments
Suspension types
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
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
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]