1. KAGRA ISC Electrical Components Layout
May 17, 2019
KAGRA ISC Electrical Components Layout
Yuta Michimura
Ando Group
Department of Physics, University of Tokyo

2. Scope and Disclaimer
Draw rough layout of electrical components (RF distribution, PD/QPDs, servo boards) for KAGRA ISC
Cameras and picomotors are not included
Components for ISS, ALS, and OMC are very uncertain
“AS rack” is currently not on the rack list
Underlined ones are used also for iKAGRA
References: - JGW-D (IMC servo topology) - JGW-D (Cabling around PSL+IMC) - JGW-D (electronics racks layout) - JGW-D (what’s inside electronics racks) - JGW-T (list of ISC detection ports) - Wiki/OutputTables (list of output tables)

3. KAGRA Layout EYT TRY table EYC chamber EYA IMC TRANS MCE IYA IYC PSL
rack
MCE
IYA
IYC
PCY1
PSL
IY1
IMMT2T
TRX MC
IX1
PCX1
MCF
PRM
PR2
IFI
IMM
PR3 BS
IXC
EXC
IXA
EXA
EXT IO
IMMT1T
IMC REFL
REFL
MMT
PRM
POY
LSC
ASC1
ASC2
AUX
POP
SR2
POS
EX2
EX3
EX4
PR2 BS
SR2
SR3
POX
AS?
OMM AS
Server room

4. List of EOMs, PDs, QPDs Underline: also for iKAGRA [ ]: may be omitted
EOM (fPMC)
EOM (fIMC, f2)
EOM (f1, f3)
PMCR (fPMC, DC)
PMCT (DC)
REFCAVR (fIMC, DC)
REFCAVT (DC)
IP A (DC)
IP B (DC)
EYT
TRYVAC A (DC)
TRYVAC B (DC)
TRYVAC GR A (DC)
TRYVAC GR B (DC)
TRY
IMCT (DC)
[IMCT A (DC)]
[IMCT B (DC)]
TRY (DC)
TRY GR (DC)
[TRY A (DC)]
[TRY B (DC)]
[TRY GR A (DC)]
[TRY GR B (DC)]
EY2
EYC
EY3
POPVAC (f1, f2, DC)
POPVAC A (f1, f2, DC)
POPVAC B (f1, f2, DC)
EY4
IMCTVAC A (DC)
IMCTVAC B (DC)
EYA
IMC
TRANS
TRX (DC)
TRX GR (DC)
[TRX A (DC)]
[TRX B (DC)]
[TRX GR A (DC)]
[TRX GR B (DC)]
REFLVAC (f1, f2, DC)
REFLVAC A (f1, f2, DC)
REFLVAC B (f1, f2, DC)
IMMT2TVAC (DC)
IMMT2TVAC A (DC)
IMMT2TVAC B (DC)
MCE
IMMT2T (f1, f2, DC)
[IMMT2T A (DC)]
[IMMT2T B (DC)]
IYA
TRXVAC A (DC)
TRXVAC B (DC)
TRXVAC GR A (DC)
TRXVAC GR B (DC)
IYC
PCY1
IMMT1TVAC (DC)
PSL
IY1
IMMT2T
[POYVAC (f1, f2, DC)]
TRX MC
IX1
PCX1
MCF
PRM
PR2
IFI
IMM
PR3 BS
IXC
EXC
IXA
EXA
EXT IO
IMMT1T
IMC REFL
REFL
MMT
PRM
POY
LSC
ASC1
ASC2
AUX
POP
SR2
POS
EX2
EX3
EX4
EOM (fALSY)
SPOS (2*f1, 2*f2, DC)
POS GR (fALSY, DC)
PLLY (BB, DC)
PR2 BS
SR2
[IMMT1T (DC)]
IMCR (fIMC, DC)
IMCR A (fIMC, DC)
IMCR B (fIMC, DC)
SR3
POY (f1, f2, DC)
POX
POX (f1, f2, DC)
[POXVAC (f1, f2, DC)]
EOM (fALSX)
POP (f1, f2, DC)
SPOP (2*f1, 2*f2, DC)
POP GR (fALSX, DC)
PLLX (BB, DC)
[POP A (f1, f2, DC)]
[POP B (f1, f2, DC)]
ASVAC (f1, DC)
OMCTVAC (DC)
ASVAC A (f1, DC)
ASVAC B (f1, DC)
OMCTVAC A (DC)
OMCTVAC B (DC)
AS?
AS (f1, DC)
OMCT (DC)
AS A (f1, DC)
AS B (f1, DC)
[OMCT A (DC)]
[OMCT B (DC)]
REFL (f1, f2, DC)
REFL NRSB (f3-f1, f2-f1, DC)
REFL A (f1, f2, DC)
REFL B (f1, f2, DC)
OMM AS
Server room

5. Where Do Signals Go EYT TRY EYC DC DC EYA IMC TRANS MCE IYA fIMC, DC
f1, f2, DC
IYC
PCY1
PSL
IY1
IMMT2T
TRX MC
IX1
PCX1
MCF
PRM
PR2
IFI
IMM
PR3 BS
IXC
EXC
IXA
EXA
EXT IO
IMMT1T
IMC REFL
REFL
MMT
PRM
POY
LSC
ASC1
ASC2
AUX
POP
SR2
POS
EX2
EX3
EX4 DC DC
PR2 BS
SR2
f1, f2, DC
f1, f2,
2*f1, 2*f2,
fALSX,
BB, DC
fIMC, DC
SR3
2*f1, 2*f2, fALSY, BB, DC
f1, f2, f3-f1, f3-f2, DC
POX
fPMC, DC
AS?
OMM AS
f1, f2, DC
f1, DC
Server room

6. RF Generation and Distribution
EYT
TRY
EY2
EYC
EY3
EY4
EYA
IMC
TRANS
MCE
IYA
fPMC
IYC
PCY1
PSL
IY1
IMMT2T
TRX MC
IX1
PCX1
MCF
PRM
PR2
IFI
IMM
PR3 BS
IXC
EXC
IXA
EXA
EXT IO
IMMT1T
IMC REFL
REFL
MMT
PRM
POY
LSC
ASC1
ASC2
AUX
POP
SR2
POS
EX2
EX3
EX4
PR2 BS
SR2
fIMC
f1 → 2*f1 f2
→ 2*f2
f3 → f3-f1
→ f3-f2
fALSX
fALSY
SR3
POX
AS?
OMM AS
Server room

7. List of Servo Boards EYT TRY EYC EYA IMC TRANS MCE IYA IYC PSL IMMT2T
PCY1
PSL
IY1
IMMT2T
TRX MC
IX1
PCX1
MCF
PRM
PR2
IFI
IMM
PR3 BS
IXC
EXC
IXA
EXA
EXT IO
IMMT1T
IMC REFL
REFL
MMT
PRM
POY
LSC
ASC1
ASC2
AUX
POP
SR2
POS
EX2
EX3
EX4
PR2 BS
SR2
Common Mode Servo (for IMC)
ISS
SR3
Common Mode Servo (for CARM)
Common Mode Servo (for ALSX)
Common Mode Servo (for ALSY)
Phase Frequency Discriminator (for ALSX)
Phase Frequency Discriminator (for ALSY)
PLL Servo ? (for ALSX)
PLL Servo ? (for ALSY)
POX
TTFSS
PMC Servo
OMC Servo ?
AS?
OMM AS
Server room

8. List of PZTs PZTs in-air PZTs in-vac EYT TRY EYC EYA IMC TRANS MCE IYA
IYC
PCY1
PSL
IY1
IMMT2T
TRX MC
IX1
PCX1
MCF
PRM
PR2
IFI
IMM
PR3 BS
IXC
EXC
IXA
EXA
EXT IO
IMMT1T
IMC REFL
REFL
MMT
PRM
POY
LSC
ASC1
ASC2
AUX
POP
SR2
POS
EX2
EX3
EX4
PR2 BS
SR2
SR3
POX
Laser
PMC
Periscope x4
AS?
OMM AS
OMC
Server room

9. List of Picomotors picomotors in-air picomotors in-vac EYT TRY
steering to TRY x4
TRYVAC QPD x4
TRYVAC GR QPD x4
[TRY QPD x4]
[TRY GR QPD x4]
EY2
EYC
[IMCT QPD x4]
EY3
steering to POP x4
POPVAC QPD x4
EY4
steering to IMC x4
IP QPD x4
MCe sus x2
IMCTVAC QPD x4
EYA
IMC
TRANS
MCE
steering to IFI x4
IMMT2TVAC PD x2
IMMT2TVAC QPD x4
IYA
[TRX QPD x4]
[TRX GR QPD x4]
[IMMT2T QPD x4]
MCi sus x2
MCe sus x2
IYC
PCY1
steering to TRX x4
TRYVAC QPD x4
TRYVAC GR QPD x4
IMMT2TVAC PD x2
PSL
IY1
IMMT2T
TRX MC
IX1
PCX1
MCF
PRM
PR2
IFI
IMM
PR3 BS
IXC
EXC
IXA
EXA
EXT IO
IMMT1T
IMC REFL
REFL
MMT
PRM
POY
LSC
ASC1
ASC2
AUX
POP
SR2
POS
EX2
EX3
EX4
steering Ygreen x4
PR2 BS
SR2
IMCR QPD x4
SR3
POX
steering Xgreen x4
[POP QPD x4]
AS?
REFL QPD x4
OMM AS
AS QPD x4
[OMCT QPD x4]
steering to AS x4
ASVAC QPD x4
OMCTVAC QPD x4
Server room