Optical LeversOptical LeversLayout and CablingLayout and Cabling

Yuta Michimura, Yuya KuwaharaAndo Group

Department of Physics, University of Tokyo

April 20, 2023

• Draw rough layout and cabling for optical levers (oplevs) for mirrors

• Oplevs for optical tables are not considered yet• “AS rack” is currently not on the list from DGS/AEL group

• References: - JGW-D1402411 (oplev QPD) - JGW-D1302087 (oplev QPD interface with whitening) - JGW-D1100425 (electronics racks layout) - JGW-D1402831 (what’s inside electronics racks)

Scope and DisclaimerScope and Disclaimer

2

IFI

KAGRA LayoutKAGRA Layout

3

MCF IMM

MCE

PRMPR3

PR2BS

SR2

SR3

OMM

IYC

IYA

EYA

EYC

EYT

IXC IXA EXA EXC EXT

IMC REFL

REFL

IMC TRANS

IMMT2T

IMMT1T

POY

POX

POPPOS

TRY

TRX

AS

IO

MC

MMTPRMLSCASC1ASC2AUX

PR2 BS SR2

IX1PCX1

IY1

PCY1

EY2

EY3

EY4

EX2 EX3 EX4

PSL

Server room

AS?

table

chamber

rack

IFI

List of OplevsList of Oplevs

4

MCF IMM

MCE

PRMPR3

PR2BS

SR2

SR3

OMM

IYC

IYA

EYA

EYC

EYT

IXC IXA EXA EXC EXT

IMC REFL

REFL

IMC TRANS

IMMT2T

IMMT1T

POY

POX

POPPOS

TRY

TRX

AS

IO

MC

MMTPRMLSCASC1ASC2AUX

PR2 BS SR2

IX1PCX1

IY1

PCY1

EY2

EY3

EY4

EX2 EX3 EX4

PSL

Server room

AS?

MCe

Blue is for iKAGRA and bKAGRAGreen is for bKAGRA only

MCiMCo

IMMT2IFI (?)STM1 (?)STM2 (?)

IMMT1PRM

PR3 PR2BS

ITMY

ITMY

ETMY

ETMY

ITMX ITMX

ETMX ETMX

SR2

SR3

SRMOMC (?)

TMSY (?)

TMSX (?)

IFI

Where Do Signals GoWhere Do Signals Go

5

MCF IMM

MCE

PRMPR3

PR2BS

SR2

SR3

OMM

IYC

IYA

EYA

EYC

EYT

IXC IXA EXA EXC EXT

IMC REFL

REFL

IMC TRANS

IMMT2T

IMMT1T

POY

POX

POPPOS

TRY

TRX

AS

IO

MC

MMTPRMLSCASC1ASC2AUX

PR2 BS SR2

IX1PCX1

IY1

PCY1

EY2

EY3

EY4

EX2 EX3 EX4

PSL

Server room

AS?

Oplev signals should go to the rack which has respective mirror suspension circuits.DC power for SLD should also be supplied from the same rack.

• SLD (Super Luminescent Diode)• SUPERLUM SLD-MS-261-MP1-FC/APC-PMF• power ~1 mW, wavelength 680 nm• needs +15 ~ +24 VDC

(+18V will be supplied from the racks; needs conversion connector)

Light SourceLight Source

6

• schematic: JGW-D1402411• 4 DC outputs from quadrants (Dsub 15pin)• needs +/- 15 VDC (Dsub 15pin)

(supplied from whitening filter interface)

Oplev QPDOplev QPD

7photo by Yaguchi

• schematic: JGW-D1302087 (Universal whitening filter with DC power) for 2 QPDs

• receives Dsub 15pin from QPD, supplies +/- 15 VDC for QPD, apply whitening filters for 4 DC outputs before they go to AA filters

• whitening filters will be switched with BO/BI (Dsub 37pin)• needs +/- 18 VDC

Oplev QPD Interface with WhiteningOplev QPD Interface with Whitening

8

Front Panel

Rear Panel

CablingCabling

9

BNC

SMA

DC power

9f Dsub (pin, gender)Other cable

Coaxial cable

ribbon cable

DC power cable

B

N

SMB, SMC

～ needs AC power

C

N

Oplev QPD Interface (D1302087)

±18V

to AA

15m 37f

9f 37f

to BI

DC Power Supplies

rack

Oplev QPD(D1302087)

15f±15V,

DC1,2,3,4

from BO

pylon

pylon

SLDconversion

±18V±18V

+18Vmirror

9f 37f

15m 37f

AA: anti-aliasing filterBO: binary output moduleBI: binary input module

In1 From BO In2 From BO

Out1 To BIOut2 To BI