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 * BB PD for ALS PLL not considered yet  * BB PDs (and their interface) for ALS PLL not considered yet

Analog Electronics for Interferometer Control

Electronics

Red rows: To be designed (or selected). Yellow rows: Not yet purchased or short of stock. Green rows: Ready for iKAGRA. White rows: Ready for bKAGRA. Pink rows: status unknown

Name

Height

Schematics

Power

Description

Needed
(iKAGRA)

Needed
(bKAGRA)

In stock

Status

for PSL

RF Oscillator Source

?

Agilent N5181A

AC

for the time being

3

7

5

Stored in ICRR and Hongo

RF PD

-

JGW-D1201280

+-18V

has RF HI, RF LOW outputs(BNC), and DC output(Dsub 9pin, which includes +-18V)

5

17

1

3: hand made

DC PD

-

Thorlabs PDA100A

+-12V

has DC output(BNC), needs power cable PDA-C-72

6

7

TTFSS

-

JGW-D1301823

from Interface

1

1

1

At the site

TTFSS Interface

-

JGW-D1301831

+-17V,+-24V,+-200V

1

1

1

At the site

AOM Driver

-

Crystal Technology 1110AF-AEFO-1.5

+28V

1

1

1

At the site

PMC Servo Board

-

(LIGO-D1001618)

+-17V,+-24V,+-200V?

may need interface board

1

1

Designing

for IMC LSC

Quad IQ Demodulator LSC

1U

JGW-D1402412

+-18V

4 LOs for 4 demodulation channels

0

7

1

5 in production

Dual IQ Demodulator

1U

(LIGO-E1100044)

+-18V

2 LOs for 2 demodulation channels, fast verison

2

3

Common Mode Servo Board

1U

(LIGO-D0901781)

+-17V,+-24V

2 inputs, slow and fast outputs

2

4

In production

RF PD Interface Board

1U

(LIGO-D1102079)

+-18V

for ribbon cables from 4 RF PDs, with whitening filter

2

5

for IMC ASC, better PSL

RF QPD

-

JGW-D1402631

+-18V

should have 4 RF outputs, 4 DC outputs

2

14

(5)

5 in production

RF QPD Interface Board

1U

(LIGO-D1101906)

+- 18V

for ribbon cables from 4 RF QPDs, without whitening filter

1

4

DC QPD

-

JGW-D1402411

+-15V

has 4 DC outputs(Dsub 15pin, which includes +-15V) use oplev QPD for the time being

10

12

DC QPD Interface Board

1U

JGW-D1302087

+-18V

for ribbon cables from 2 DC QPDs, with whitening filter

5

8

Quad IQ Demodulator ASC

1U

JGW-D1402412

+-18V

1 LO for 4 demodulation channels

2

22

4

RF Distribution Amplifier

1U

(LIGO-D1000124)

+-17V,+-24V

split into 8

3

10

Components for 1 purchased (RF amp + 8way splitter)

Delay Line Phase Shifter

1U

(LIGO-D0900128)

+15V?

for 2 channels

2

3

DC PD Interface Board

-

(LIGO-D1002932)

+-12V

for ribbon cables from 4 DC PDs, without whitening filter

5

6

for DRFPMI

Frequency Doubler

1U

(LIGO-D1002178)

+-17V,+-24V

for sideband power monitor

0

2

Difference Frequency Generator

1U?

for nonresonant sidebands, 2 channels

0

1

for ALS

RF PD for green

-

(LIGO-D1002969)

BB can be OK

0

2

DC PD for green

-

Thorlabs PDA100A

+-12V

has DC output, needs power cable PDA-C-72

0

2

DC QPD for green

-

JGW-D1402411

+-15V

has 4 DC outputs(Dsub 15pin, which includes +-15V) use oplev QPD for the time being

0

4

Phase Frequency Discriminator

1U

(LIGO-D1002476)

+-17V,+-24V

for ALS, 2 channels

0

1

VCO with PLL

2U

(LIGO-D0900605,LIGO-D1300812)

+-17V,+-24V

0

2

for better sensitivity

DC PD in vacuum

-

(LIGO-D1101059)

for ISS and OMCTVAC

0

3

DC QPD in vacuum

-

(LIGO-T0900423)

bare QPD without amplifier

0

10

DC QPD in vacuum for green

-

(LIGO-T0900423)

bare QPD without amplifier

0

4

DC PD Amplifier

?

+-18V

for DC PD in vacuum

0

2

DC QPD Amplifier

1U

(LIGO-D1002481)

+-18V

for ribbon cables from 2 DC QPDs in vacuum

0

7

ISS Board

?

(LIGO-D1001985, LIGO-D1300439)

0

1

OMC Servo Board

?

0

1

RF Oscillator Source(Wenzel OCXO)

2U

(LIGO-D080702)

0

7

EOM/AOM Driver

?

(LIGO-E1400445)

for RF AM stabilization, modulation amplitude adjustment

0

3

TO DO

  • BB PDs (and their interface) for ALS PLL not considered yet
  • Details of ISS, ALS, OMC servo are uncertain at this point

Photodetector list

For each rack

PSL

See JGW-D1402984 for cabling.

Name

Height

Description

iKAGRA?

RF Oscillator Source

?

for fPMC sideband

yes

(RF splitter)

-

split fPMC into 2 for PSL EOM, PMCR LO

yes

PMC Servo Board

-

for PMC servo, receives PMCR, needs fPMC LO

yes

TTFSS

-

for Refcav servo, receives REFCAVR, needs fIMC LO from IO rack

yes

TTFSS Interface

-

for TTFSS

yes

DC PD Interface Board

-

for PMCT, REFCAVT, (2ch left)

yes

Output Tables

Interface boxes for Thorlabs DC PDs are located at the respective output tables.

Name

Height

Description

iKAGRA?

Location

DC PD Interface Board

-

for IMCT, (3ch left)

yes

IMC TRANS table -> IO rack

DC PD Interface Board

-

for IMMT1T, (3ch left)

yes

IMMT1T pylon -> IO rack

DC PD Interface Board

-

for TRX, TRX_GR, (2ch left)

yes

TRX table -> EX4 rack

DC PD Interface Board

-

for TRY, TRY_GR, (2ch left)

yes

TRY table -> EY4 rack

DC PD Interface Board

-

for OMCT, (3ch left)

AS table -> AS rack?

IO rack

Located between PSL and MCF chamber. Generates RF for fIMC, f1, f2, f3, 2*f1, 2*f2, f3-f1, f3-f2, fALSX, and fALSY. Has servo circuits for FRC, IMC, and ISS. Takes care of PD/QPDs on PSL, IMC REFL, IMC TRANS, IMMT1, and IMMT2 tables. Also takes care of equivalent PD/QPDs in vacuum.

Name

Height

Description

iKAGRA?

PD/QPD

Dual IQ Demodulator

1U

for IMCR(fIMC), (1ch left)

yes

Quad IQ Demodulator LSC

1U

for IMMT2T(f1), IMMT2T(f2), (2ch left)

RF PD Interface Board

1U

for PMCR, REFCAVR, IMCR, IMMT2T

yes

RF QPD Interface Board

1U

for IMCR_A/B, (2ch left)

yes

DC PD Amplifier

1U

for IMMT1TVAC, IMMT2TVAC, (2ch left)

DC QPD Interface Board

1U

for IP_A/B

yes

DC QPD Interface Board

1U

for IMCT_A/B

yes

DC QPD Interface Board

1U

for IMMT2T_A/B

yes

DC QPD Amplifier

1U

for IMCTVAC_A/B

DC QPD Amplifier

1U

for IMMT2TVAC_A/B

fIMC

RF Oscillator Source

?

for fIMC sideband (also for Refcav)

yes

RF Distribution Amplifier

1U

for fIMC. to PSL EOM, to Delay Line for Refcav, to Delay Line for IMC LSC, to IQ Demod ASC x 2, (3ch left)

yes

Delay Line Phase Shifter

1U

for TTFSS LO(Refcav lock), IMCR LO(IMC LSC)

yes

Common Mode Servo Board

1U

for IMC servo

yes

Quad IQ Demodulator ASC

1U

for IMCR_A QPD(fIMC)

yes

Quad IQ Demodulator ASC

1U

for IMCR_B QPD(fIMC)

yes

f1

RF Oscillator Source

?

for f1 sideband

yes

RF Distribution Amplifier

1U

for f1. to PSL EOM, to PSL EOAM, to LSC racks, to Frequency Doubler, to Diff. Freq. Generator, to IMMT2T LO, (2ch left)

yes

Frequency Doubler

1U

f1 to 2*f1 for ISC racks

f2

RF Oscillator Source

?

for f2 sideband

RF Distribution Amplifier

1U

for f2. to PSL EOM, to LSC racks, to Frequency Doubler, to Diff. Freq. Generator, to IMMT2T LO, (3ch left)

Frequency Doubler

1U

f1 to 2*f1 for ISC racks

f3

RF Oscillator Source

?

for f3 to splitter

(RF splitter)

-

split f3 into 2 for Diff. Freq. Generator

Diff. Freq. Generator

1U?

make f3-f1 for ISC racks, make f3-f2 for ISC racks

fALSX,fALSY

RF Oscillator Source

?

for fALSX sideband for ISC racks

RF Oscillator Source

?

for fALSY sideband for ISC racks

Others

ISS Board

??

ISC racks

Stands for LSC, ASC1, ASC2 and AUX racks located between PR3 and PR2 chambers. Has servo circuits for CARM, ALSX, and ALSY. Takes care of PD/QPDs on REFL, POP, POS, POX, POY, and AS tables. Also takes care of equivalent PD/QPDs in vacuum.

Name

Height

Description

iKAGRA?

PD/QPD

Dual IQ Demodulator

1U

for REFL(f1), REFL(f2)

yes

Dual IQ Demodulator

1U

for POP_GR(fALSY), POS_GR(fALSX)

Quad IQ Demodulator LSC

1U

for REFLNRSB(f3-f1), REFLNRSB(f3-f2), AS(f1), ASVAC(f1)

Quad IQ Demodulator LSC

1U

for POP(f1), POP(f2), SPOP(2*f1), SPOP(2*f2)

Quad IQ Demodulator LSC

1U

for SPOS(2*f1), SPOS(2*f2), (2ch left)

Quad IQ Demodulator LSC

1U

for POX(f1), POX(f2), POY(f1), POY(f2)

Quad IQ Demodulator LSC

1U

for REFLVAC(f1), REFLVAC(f2), POPVAC(f1), POPVAC(f2)

Quad IQ Demodulator LSC

1U

for POXVAC(f1), POXVAC(f2), POYVAC(f1), POYVAC(f2)

RF PD Interface Board

1U

for REFL, REFLNRSB, AS, SPOS

yes

RF PD Interface Board

1U

for POX, POY, POP, SPOP

RF PD Interface Board

1U

for POP_GR, POS_GR, POXVAC, POYVAC

RF PD Interface Board

1U

for REFLVAC, POPVAC, ASVAC, (1ch left)

RF QPD Interface Board

1U

for REFL_A/B, POP_A/B

RF QPD Interface Board

1U

for AS_A/B, ASVAC_A/B

RF QPD Interface Board

1U

for REFLVAC_A/B, POPVAC_A/B

f1

RF Distribution Amplifier

1U

for f1. to Delay Line for CARM, POP LO, POX LO, POY LO, AS LO, REFLVAC LO, ASVAC LO, to RF Dist.

yes

RF Distribution Amplifier

1U

for f1. to POPVAC LO, POXVAC LO, POYVAC LO, IQ Demod ASC x 3, to RF Dist.

RF Distribution Amplifier

1U

for f1. IQ Demod ASC x 7, to RF Dist.

RF Distribution Amplifier

1U

for f1. IQ Demod ASC x 2, (6ch left)

Delay Line Phase Shifter

1U

for REFL LO(f1, CARM), REFL LO(f2, CARM)

yes

Common Mode Servo Board

1U

for CARM servo

yes

Quad IQ Demodulator ASC

1U

for REFL_A QPD(f1)

Quad IQ Demodulator ASC

1U

for REFL_B QPD(f1)

Quad IQ Demodulator ASC

1U

for POP_A QPD(f1)

Quad IQ Demodulator ASC

1U

for POP_B QPD(f1)

Quad IQ Demodulator ASC

1U

for AS_A QPD(f1)

Quad IQ Demodulator ASC

1U

for AS_B QPD(f1)

Quad IQ Demodulator ASC

1U

for REFLVAC_A QPD(f1)

Quad IQ Demodulator ASC

1U

for REFLVAC_B QPD(f1)

Quad IQ Demodulator ASC

1U

for POPVAC_A QPD(f1)

Quad IQ Demodulator ASC

1U

for POPVAC_B QPD(f1)

Quad IQ Demodulator ASC

1U

for ASVAC_A QPD(f1)

Quad IQ Demodulator ASC

1U

for ASVAC_B QPD(f1)

f2

RF Distribution Amplifier

1U

for f2. to REFL LO, POP LO, POX LO, POY LO, REFLVAC LO, POPVAC LO, POXVAC LO, RF Dist.

RF Distribution Amplifier

1U

for f2. to POYVAC LO, RF Dist., (6ch left)

RF Distribution Amplifier

1U

for f2. IQ Demod ASC x 8

Quad IQ Demodulator ASC

1U

for REFL_A QPD(f2)

Quad IQ Demodulator ASC

1U

for REFL_B QPD(f2)

Quad IQ Demodulator ASC

1U

for POP_A QPD(f2)

Quad IQ Demodulator ASC

1U

for POP_B QPD(f2)

Quad IQ Demodulator ASC

1U

for REFLVAC_A QPD(f2)

Quad IQ Demodulator ASC

1U

for REFLVAC_B QPD(f2)

Quad IQ Demodulator ASC

1U

for POPVAC_A QPD(f2)

Quad IQ Demodulator ASC

1U

for POPVAC_B QPD(f2)

2*f1,2*f2

(RF splitter)

-

split 2*f1 into 2 for SPOP LO, SPOS LO

(RF splitter)

-

split 2*f2 into 2 for SPOP LO, SPOS LO

f3-f1,f3-f2

fALSX,fALSY

(RF splitter)

-

split fALSX into 2 for POP EOM, Delay Line for ALSX

Delay Line Phase Shifter

1U

for POP_GR LO(ALSX), POS_GR LO(ALSY)

Common Mode Servo Board

1U

for ALSX servo

(RF splitter)

-

split fALSY into 2 for POS EOM, Delay Line for ALSY

Common Mode Servo Board

1U

for ALSY servo

Phase Frequency Discriminator

1U

for ALSX, ALSY

VCO with PLL

2U

for ALSX

VCO with PLL

2U

for ALSY

EX4 rack

Located close to EXC chamber. Takes care of PD/QPDs on TRX table. Also takes care of equivalent PD/QPDs in vacuum.

Name

Height

Description

iKAGRA?

PD/QPD

DC QPD Interface Board

1U

for TRX_A/B

yes

DC QPD Interface Board

1U

for TRX_GR_A/B

DC QPD Amplifier

1U

for TRXVAC_A/B

DC QPD Amplifier

1U

for TRXVAC_GR_A/B

EY4 rack

Located close to EYC chamber. Components should be the same as those in EX4.

AS rack

Should be located close to OMM chamber. Takes care of PD/QPDs for OMC servo.

Name

Height

Description

iKAGRA?

PD/QPD

DC PD Amplifier

-

for OMCTVAC, (3ch left)

DC QPD Interface Board

1U

for OMCT_A/B

DC QPD Amplifier

1U

for OMCTVAC_A/B

Others

OMC Servo board

??

for OMC lock


Plan (as of 2012-08)

  • Test fabrication of RF PD (by the end of September ?, test in October)
  • Compile other analog circuit designs from LIGO into KAGRA spec. (by the end of October)
  • Design frequency stabilization related circuits with NAOJ group (by the end of FY2012)

RFPD

KAGRA/Subgroups/MIF/AEL (last edited 2019-08-29 09:12:32 by KiwamuIzumi)