KAGRA Interface Control
Contents
2. Table of the interface items between subsystems
3. Working groups for important interface issues
6. Duty factor
7. Reference
1. Scope of each subsystem
Tunnel (TUN/TU): Tunnel design, Underground lab area, Access tunnel, and Safety
Facility (FCL/FA): TBD
Vacuum (VAC/VA): Two beam tubes, Chambers, Baffles, Beam targets, Layout, and Pumps
Cryogenic (CRY/CR): Cryostat, Shield, Cryo duct, Cryo-cooler; Cryo-suspension, and Heat link
Vibration Isolation (VIS/VI): Four Type-A systems, Seven Type-B systems, and Several Type-C systems
Mirror (MIR/MI): 23kg Sapphire mirrors, Silica BS, Small Silica mirrors for PRC, SRC, MC, OMC
Laser (LAS/LA): 180W laser, 10-50W laser for iKAGRA, Laser control system, and Optics for lasers
Main Interferometer (MIF/IF): MIF design (length, RoC, layout), LSC, ASC, Lock acquisition, and Commissioning
Input/Output Optics (IOO/IO): Input optics between laser and PRM, and Output optics including OMMT and OMC
Auxiliary Optics (AOS/AO): All the optical systems that are not included in MIF or IOO
Analog Electronics (AEL/EL): TBD
Digital System (DGS/DG): Real-time control, Data acquisition, IFO tuning, Automatic operation, and Information collection
Data Analysis (DAS/DA): Management of observation data
Geophysics Interferometer (GIF/GI): Baseline interferometer and Arrangement of sensors and benchmarks
A list of allocated items to each subsystem is here. |
2. Table of the interface items between subsystems
|
Infra (TUN/FCL/VAC) |
Susp (VIS/CRY) |
Optics (MIR) |
IFO (MIF/IOO/AOS/LAS) |
Control (ALE/DGS/GIF/DC) |
Infra |
-- |
||||
Susp |
-- |
||||
Optics |
-- |
||||
IFO |
-- |
||||
Control |
-- |
An interface item table at a glance is here. |
3. Working groups for important interface issues
Layout (VAC,MIF,AOS,IOO, etc.)
Cable connectors (VIS,CRY,AEL, etc.)
Interlock (MIF,IOO,LAS, etc.)
Detector diagnostics (MIF,DAS, etc.)
Optical lever reference (AOS,TUN,VAC etc.)
4. Parameter list
5. Requirements and tolerance
Requirements are given in the parameter list. Each parameter must be not so far from the required value as to deteriorate the sensitivity by less than 1%.
Tolerance is given for some of the parameters by calculating the robustness of the sensitivity. See here.
6. Duty factor
The target duty factor of KAGRA is 80%. Breakdown of the time loss is shown here.