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== Tunnel Related == |
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.
Contents
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 |
鏡 |
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 |
Tunnel Related
Interferometer Related
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 |
Digital Related
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 |
Vacuum Related
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 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 |
|
Cryogenic Related
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 |
Vibration Isolation Related
Word/Acronym |
Meaning/Description |
Synonyms |
CB |
Coil Box |
|
IM |
Intermediate Mass |
|
MB |
Magnet Box |
|
PF |
Platform |
|
RM |
Recoil Mass |
|
TM |
Test Mass |