Terminology

This page lists commonly used terms and acronyms in the KAGRA project. If you encounter unknown acronyms in the KAGRA documents, come back to this page to find a meaning. If you don't find a description here, send an email to the author of the document and poke him/her to add a description here.

It is desirable to order the table in alphabetical order.

Subgroup name and Number

No.

Word/Acronym

Meaning/Description

Synonyms

1

Site

KAGRA Site

トンネルを含む全般

2

FCL

Facility

施設整備

3

VAC

Vacuum

真空

4c

CRY

Cryogenics

低温

4p

CRY-p

Cryogenic Payload

低温懸架

5

VIS

Vibration Isolation

防振

6

MIR

Mirror

7

LAS

Laser

レーザ

8

MIF

Main Interferometer

主干渉計

9

IOO

Input/Output Optics

入出射光学系

10

AOS

Auxiliary Optics Subsystem

補助光学系

11

AEL

Analog Electronics

アナログ電子回路

12

DGS

Digital System

デジタル系

13a

DAS

Data Analysis

データ解析

13m

DMG

Data Management

データ処理

14

GIF

Geophysics Interferometer

地球物理干渉計

**

Det Char

Detector Characterization

検出器特性

Document

Word/Acronym

Meaning/Description

Synonyms

RSE

Resonant sideband extraction

BRSE

Broad band RSE

DRSE

Detuned RSE

VRSE

Variable RSE. Variable optical mode between BRSE and DRSE

BRT

Beam Reducing Telescope

BS

Beam Splitter

Center

The central part of the IFO, where PRC, SRC and BS are located.

Vertex, Central Part

ETM

End Test Mass. The mirrors suspended at the far ends of the long arm cavities.

End Mirror.

ETMX

End Test Mass of X arm.

ETMY

End Test Mass of Y arm.

IFO

I guess IFO actually means InterFerometer Observatory. But it is used to mean just interferometer, the core part of an interferometric gravitational wave detector.

ITM

Input Test Mass. The mirrors forming the arm cavities suspended close to the vertex.

Front Mirror, Near Mirror.

ITMX

Input Test Mass of X arm

ITMY

Input Test Mass of Y arm

PRC

Power Recycling Cavity

PRM

Power Recycling Mirror

PR2

Name of the folding mirror in the PRC, which is closer to the PRM.

PR3

Name of the folding mirror in the PRC, which is closer to the BS.

SRC

Signal Recycling Cavity. There is a philosophical dispute going on whether to call it SRC or SEC. SEC means Signal Extraction Cavity. Since we are going to operate the LCGT in RSE configuration, probably SEC is a better name.

SEC

SRM

Signal Recycling Mirror. The main argument against the use of SEC/SEM is to use the same terminology as LIGO. Since we will collaborate with LIGO a lot, regardless of we like it or not, it is just easier to use the same words.

SEM

SR2

Name of the folding mirror in the SRC, which is closer to the SRM.

SR3

Name of the folding mirror in the SRC, which is closer to the BS.

Vertex

The central part of the IFO, where PRC, SRC and BS are located.

Center, Central Part

X-arm

The Fabry-Perot arm on the transmission side of the BS. The use of the words listed in the synonyms column is prohibited as it creates great confusion. If we use the name X-arm persistently, people from Kamioka-Kogyo will follow the convention eventually.

In-line arm, 2nd tunnel, Sako-tunnel

Y-arm

The Fabry-Perot arm on the reflection side of the BS. The use of the words listed in the synonyms column is prohibited as it creates great confusion. If we use the name Y-arm persistently, people from Kamioka-Kogyo will follow the convention eventually.

Perpendicular arm, 1st tunnel, Mozumi-tunnel

Hardware:

Word/Acronym

Meaning/Description

Synonyms

RT

Real-Time

I/O Chassis

PCIe expansion chassis for ADC/DAC/BO slots

ADC

Analog to Digital Converter.

DAC

Digital to Analog Converter.

BO

Binary Output. Used for switching by 0V-5V output.

AA

Anti Alias (filter)

AI

Anti Imaging (filter)

DAQ

Data Acquisition

RFM

Reflective Memory

PCIe

PCI Express

TDS

Timing Distribution System

Software:

Word/Acronym

Meaning/Description

Synonyms

daq

data acquisition

nds

a software to control data stream

daqd

daq daemon

EPICS

Experimental Physics and Industrial Control System

medm

EPICS GUI tool for digital system on X windows, used as human interfaces

gds, DTT

Diagnostic Test Tool. Software on digital system, for FFT, swept sine measurement etc.

diaggui

dataviewer

Software on digital system, low sampling oscilloscope, used as multiple channels.

foton

Digital filter composer.

awgtpman

test point manager

awg

arbitrary waveform generator

TP channel, test point channnel

channel name for fast data stream, a test point is used when a channel name is called.

DAQ channel

reserved channels for testpoints and the date will be stored to storage drive. Test point is not used when the channel name is reserved.

EPICS channel

slow channels defined by EPICS database

AWG channel

An excitation point is used when the awg excites a awg channel

RFM

Reflective Memory

PCIe

PCI Express

Material and Technology

Word/Acronym

Meaning/Description

Synonyms

CCG

Cold Cathode Gauge

CP

Chemical Polish

DLC

Diamond-Like Carbon

ECB

Electro-Chemical Buffing

RP

Rotary Pump

(油)回転ポンプ

TED

Thermo-Elastic Damping

TMP

Turbo Molecular Pump

ターボ分子ポンプ

Tank (Tank Map)

Word/Acronym

Meaning/Description

Synonyms

IMC Part

MCF

Mode Cleaner Front Tank

MCE

Mode Cleaner End Tank

Michelson Part

IFI

Input Faraday Isolator Tank

IMM

Input Mode Matching Telescope Tank

REF

Reflected Light Detection Tank

PRM

Power Recycling Mirror Tank

PR3

Power Recycling Cavity Folding Mirror 3 Tank

PR2

Power Recycling Cavity Folding Mirror 2 Tank

GPO

Green and POX, POY Tank

BS

Beam Splitter Tank

SR2

Power Recycling Cavity Folding Mirror 2 Tank

SR3

Power Recycling Cavity Folding Mirror 3 Tank

SRM

Signal Recycling Mirror Tank

OFI

Output Faraday Isolator Tank

OMC

Output Mode Cleaner Tank

X Arm

IXC

Cryogenic X arm Input Test Mass Tank

IXV

Vibration Isolation Suspension Tank for X arm Input Test Mass

IXA

AOS Tank for X arm Input Test Mass

EXA

AOS Tank for X arm End Test Mass

EXC

Cryogenic X arm End Test Mass Tank

EXV

Vibration Isolation Suspension Tank for X arm End Test Mass

EXT

Transmitting Beam Monitor Tank at X End

Y Arm

IYC

Cryogenic Y arm Input Test Mass Tank

IYV

Vibration Isolation Suspension Tank for Y arm Input Test Mass

IYA

AOS Tank for Y arm Input Test Mass

EYA

AOS Tank for Y arm End Test Mass

EYC

Cryogenic Y arm End Test Mass Tank

EYV

Vibration Isolation Suspension Tank for Y arm End Test Mass

EYT

Transmitting Beam Monitor Tank at Y End

Word/Acronym

Meaning/Description

Synonyms

5N, 5N8

Five Nine, Five Nine Eight

材料の純度を表すための"9"の数。99.999%->5N、99.9998%->5N8 のように表す。

AFB

Adhesion Free Bonding (TM Onyx Opt.).

Onyx Opt.社の拡散接合技術。接合レーザーロッド製品がある。

CHES

Controlled Heat Extraction System

融液下面の結晶成長法の一つ。米国Advanced Renewable Energy Companyの技術。最大結晶はΦ500、302kgが報告されている(2016)

COP

Coefficient Of Performance

成績係数、動作係数。冷凍機の性能の指標として使われる。

DB

Direct Bonding

直接接合。接着剤を使わない接合法。

EFG

Edge-defined Film-fed Growth method

Stepanov method、融液からの引上制御で成形も行う結晶成長法

FRP

Fiber Reinforced Plastics

繊維強化プラスティック

GMC

Gifford-McMahon Cryocooler

GM冷凍機。パルス管冷凍機に比べて、冷凍能力は大きいが、往復運動する個体部品を持つため冷凍機本体の振動は大きい。

HCB

Hydroxide-Catalysis Bonding

KOH, NaOHの希薄水溶液、Na2SiO3水溶液等を用いる無機材料の接着法。

HEM

Heat Exchange Method

融液下面の結晶成長法の一つ。Heガスの流れで温度制御を行う。米国Crytal Ststems Inc.の技術。最大結晶はΦ340mm、65kgが報告されている(2001)

HL

Heat Link

伝導冷却のために被冷却体と寒冷源を結ぶ冷却路で、特に振動伝達を抑える目的で使用される部分。高純度金属(Al, Cuなど)の細線束や積層薄板などが用いられる。

IM

Intermediate Mass

中間質量

IRM

Intermediate Recoil Mass

中間反跳質量

MLI

Multi Layer Insulation

多層断熱。商品名はSuper Insulator

PF

PlatForm

プラットフォーム

PTC

Pulse Tube Cryocooler

パルス管冷凍機。ヘリウムガスを作業物質として、周期的な圧力の変化で駆動する小型冷凍機。運動する個体部品を持たないため、慣性力に起因する冷凍機本体の振動は小さい。

RM

Recoil Mass

反跳質量

RRR

Residual Resistance Ratio

残留抵抗比。電気抵抗の300Kでの値と4.2Kでの値との比。

SAB

Surface Activated Bonding

表面活性化接合、Arイオンビームで表面層を除去した固体材料を接合する。

SI

Super Insulator

スーパーインシュレーター(商品名)。MLIの素材。

SQUID

Superconducting QUantum Interference Device

超伝導量子干渉素子

TES

Transition Edge Sensor

遷移端センサー

TM

Test Mass

試験質量。干渉計型検出器では鏡の機能も担う。中央側をITM、エンド側をETMと呼んで区別している。(真空チャンバーの呼称を参照)

VRS

Vibration Reduction Stage

減振ステージ。冷凍機のコールドヘッド振動防除に使われる。

Word/Acronym

Meaning/Description

Synonyms

CCR

Corner Cube Reflector

3枚鏡で入射光線の方向余弦を反転する反射体

CPS

Control Point Survey

基準点測量

DEM

Digital Elevation Model

数値標高モデル

DTM

Digital Terrain Model

数値地形モデル

GNSS

Global Navigation Satellite System

全地球航行衛星システム

GPS

Global Positioning System

汎地球測位システム

GRS80

Geodetic Reference System 1980

IAG

International Association of Geodesy

国際測地学協会

ITRF94

International Terrestrial Reference Frame 1994

LT

Laser Tracker

レーザートラッカー(測量機器)

REM

Remote Elevation Measurement

遠隔側高。TSの機能の一つ。

T.P.

Tokyo Peil

東京湾平均海面

TS

Total Station

水平角、鉛直角、距離を同時に測定できる測量機器

Word/Acronym

Meaning/Description

Synonyms

CB

Coil Box

COP

Centre Of Percussion

GAS

Geometric Anti-Spring

IM

Intermediate Mass

IMRM

Recoil Mass for Intermediate Mass

IP

Inverted Pendulum

LVDT

Linear Variable Differential Transformer

MB

Magnet Box

PF

Platform

RM

Recoil Mass

SAS

Seismic Attenuation System

SF

Standard Filter

TF

Top Filter

TM

Test Mass

KAGRA/Terminology (last edited 2018-02-11 11:02:06 by ToshikazuSuzuki)