1. KAGRA ISC Electrical Components Layout
October 14, 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
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 EOM (fPMC) EOM (fIMC) EOM (f1) EOM (f2)
EOAM (f1)
PMCR (fPMC, DC)
PMCT (DC)
REFCAVR (fIMC, DC)
REFCAVT (DC)
IP A (DC)
IP B (DC)
EYT
TRY
TRYVAC A (DC)
TRYVAC B (DC)
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
POPVAC (f1, f2, DC)
POPVAC A (f1, f2, DC)
POPVAC B (f1, f2, DC)
EY3
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
IYC
PCY1
IMMT1TVAC (DC)
TRXVAC A (DC)
TRXVAC B (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 (fALSX)
SPOS (2*f1, 2*f2, DC)
POS GR (fALSX, 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 (fALSY)
POP (f1, f2, DC)
SPOP (2*f1, 2*f2, DC)
POP GR (fALSY, 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, f3-f2, 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
PR2 BS
SR2
f1, f2, DC
f1, f2,
2*f1, 2*f2,
fALSY, DC
fIMC, DC
SR3
2*f1, 2*f2, fALSX, DC
f1, f2, f3-f1, f3-f2, DC
POX DC
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. Servo Boards EYT TRY EYC EYA IMC TRANS MCE IYA IYC PSL IMMT2T TRX MCF
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