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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

TUN

Tunnel

トンネル

2

FCL

Facility

施設整備

3

VAC

Vacuum

真空

4

CRY

Cryogenics

低温

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

入出力光学系

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

13

DAS

Data Analysis

データ解析

14

GIF

Geophysics Interferometer

地球物理干渉計

**

DET

Detector Configuration

検出器構成

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

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

Word/Acronym

Meaning/Description

Synonyms

RT

Real-Time

TDS

Timing Distribution System

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)

EPICS

Experimental Physics and Industrial Control System

AWG

Arbitrary Waveform Generator

TP

Test Point

TPMAN

Test Point Manager

DAQ

Data Acquisition

MEDM

GUI tool for digital system on X windows.

DTT

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

diaggui

dataviewer

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

foton

Digital filter composer.

RFM

Reflective Memory

PCIe

PCI Express

Material and Technology

Word/Acronym

Meaning/Description

Synonyms

DLC

Diamond-Like Carbon

ECB

Electro-Chemical Buffing

TED

Thermo-Elastic Damping

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

PR2

Power Recycling Cavity Folding Mirror 2

GPO

Green and POX, POY Tank

BS

Beam Splitter

SR2

Power Recycling Cavity Folding Mirror 2

SR3

Power Recycling Cavity Folding Mirror 3

SRM

Signal Recycling Mirror Tank

OFI

Output Faraday Isolator Tank

OMC

Output Mode Cleaner

X Arm

IXC

Cryogenic X arm Input Test Mass Tank

IXV

Vibration Isolation Suspension Tank for X arm Input Test Mass

IXA

AUX Tank for X arm Input Test Mass

EXA

AUX 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

AUX Tank for Y arm Input Test Mass

EYA

AUX 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 for Y arm End Test Mass

Word/Acronym

Meaning/Description

Synonyms

AFB

Adhesion Free Bonding (TM Onyx Opt.).

COP

Coefficient Of Performance

成績係数、動作係数

DB

Direct Bonding

直接接合

EFG

Edge-defined Film-fed Growth method

Stepanov method

FRP

Fiber Reinforced Plastics

繊維強化プラスティック

GMC

Gifford-McMahon Cryocooler

GM冷凍機

HCB

Hydro-Catalysis Bonding

HEM

Heat Exchange Method

MLI

Multi Layer Insulation

多層断熱

PTC

Pulse Tube Cryocooler

パルス管冷凍機

SAB

Surface Activated Bonding

SI

Super Insulator

スーパーインシュレーター

VRS

Vibration Reduction Stage

減振ステージ

Word/Acronym

Meaning/Description

Synonyms

CB

Coil Box

IM

Intermediate Mass

MB

Magnet Box

PF

Platform

RM

Recoil Mass

TM

Test Mass

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