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A 1: 128 multiplexing rate Time Domain SQUID Multiplexer D. Prêle, F. Voisin, M. Piat, T. Decourcelle, C. Perbost, D. Rambaud, S. Maestre, W. Marty, L. Montier Low Temperature Detectors - LTD16 20 - 24 July 2015 - Grenoble
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A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES [email protected] 5 / 16 A 1:128 multiplexing rate Time Domain

Nov 30, 2020

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Page 1: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

A 1: 128 multiplexing rateTime Domain SQUID Multiplexer

D. Prêle, F. Voisin, M. Piat, T. Decourcelle, C. Perbost,D. Rambaud, S. Maestre, W. Marty, L. Montier

Low Temperature Detectors - LTD1620 - 24 July 2015 - Grenoble

Page 2: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

Q & U Bolometric Interferometer for Cosmology - QUBICCosmology experiment for B-mode polarization of the Cosmic Microwave Background

Bolometric Fizeau interferometer

45cm window / 14°field-of-view

400 back/back horn (looking sky)

400 switches (self calibration)

Off-axis Gregorian (combiner)

2×1024 filled array (150/220GHz)

A. Tartari QUBIC : A Fizeau interferometer for B-ModesThursday 23 - Session 5

NbSi TES focal plane imager

Interference fringes (synthesized image)

1024 NbSi TES on 4 wafers (×2 freq.)C. Perbost A 248 TES Array for CMB B-mode detection Poster

Present work, sub-system :

256 TESs, 256 SQUIDs (TDM), 2 ASICs (LNA + bias)

[email protected] 2 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 3: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

Outline

1 1 : 128 TDM multiplexer topology

2 Readout chainSQUID stageCryogenic integrated circuit

3 Multiplexed signal, FLL and demultiplexing

[email protected] 3 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 4: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

Outline

1 1 : 128 TDM multiplexer topology

2 Readout chainSQUID stageCryogenic integrated circuit

3 Multiplexed signal, FLL and demultiplexing

[email protected] 4 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 5: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

×32

CBiasTES

TES

RFB

TES

Vout

mux (4 : 1)LNA+ Integrator

mu

x(3

2:1

)dif

f.SQ

UID

bias

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 6: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

×32

CBiasTES

TES

RFB

TES

Vout

mux (4 : 1)LNA+ Integrator

mu

x(3

2:1

)dif

f.SQ

UID

bias

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 7: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

×32

CBiasTES

TES

RFB

TES

Vout

mux (4 : 1)LNA+ Integrator

mu

x(3

2:1

)dif

f.SQ

UID

bias

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 8: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

+

+

1

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 9: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

-

-

2

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 10: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

+

+

3

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 11: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

-

-

4

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 12: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

+

+

5

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 13: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

-

-

6

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 14: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

+

+

7

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 15: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

-

-

8

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 16: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

32 lines

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 17: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

+

+

125

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 18: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

-

-

126

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 19: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

+

+

127

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 20: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

-

-

128

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 21: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

+

+

1

×32

CBiasTES

TES

RFB

TES

Vout

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 22: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

TES readout topology based on 2D multiplexing scheme

×32

CBiasTES

TES

RFB

TES

Vout

mux (4 : 1)LNA+ Integrator

mu

x(3

2:1

)dif

f.SQ

UID

bias

biasTES

TES

TES

TES

TES

TES

TES

TES

TES

TES

[email protected] 5 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 23: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

SQUID stageCryogenic integrated circuit

Outline

1 1 : 128 TDM multiplexer topology

2 Readout chainSQUID stageCryogenic integrated circuit

3 Multiplexed signal, FLL and demultiplexing

[email protected] 6 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 24: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

SQUID stageCryogenic integrated circuit

Time domain SQUID multiplexer for QUBICQUBIC Readout sub-system : 256 TES, 256 SQUID, 2 ASIC

Sub-system : NbSi TES Wafer (300 mK) + 256 SQUIDs (1K) + 2 ASICs (40K)

Integration of this sub-system in a dilution fridge for readout test

[email protected] 7 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 25: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

SQUID stageCryogenic integrated circuit

SQUID glued and wire bonded on a PCBStarCryoelectronics SQ680 specific design.

Solder plated track (no parasitic resistances)Shunt resistor and filter devices

[email protected] 8 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 26: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

SQUID stageCryogenic integrated circuit

32 SQUIDs glued and wire bonded on a PCB

[email protected] 8 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 27: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

SQUID stageCryogenic integrated circuit

32 SQUIDs glued and wire bonded on a PCB

[email protected] 8 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 28: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

SQUID stageCryogenic integrated circuit

64 SQUIDs glued and wire bonded on a PCB

[email protected] 8 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 29: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

SQUID stageCryogenic integrated circuit

96 SQUIDs glued and wire bonded on a PCB

[email protected] 8 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 30: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

SQUID stageCryogenic integrated circuit

128 SQUIDs glued and wire bonded on a PCB

[email protected] 8 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 31: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

SQUID stageCryogenic integrated circuit

128 SQUIDs glued and wire bonded on a box

[email protected] 8 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 32: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

SQUID stageCryogenic integrated circuit

SQUIDs glued and wire bonded on a box

[email protected] 8 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 33: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

SQUID stageCryogenic integrated circuit

ASIC Stage (Application Specific Integrated Circuit)

[email protected] 9 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 34: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

SQUID stageCryogenic integrated circuit

SiGe ASIC for cryogenic 1 :128 TD SQUID M32

SQU

IDb

ias

33

Row

MU

X

Ck

Vd

dG

nd

32 AD

R

4

I SQ

VC

MI A

mp

CM

FB

OS F

B

3

Serial link

Mu

x

4

input (from SQUID)

Dif

f

mux output 1 : 128

1 2

3

BiCMOS SiGe ASIC350nm AMS technology

1 SQUID rows addressing :Biasing throughcapacitors with ACmultiplexed currentsources (1 : 32)

2 Low noise amplifier withmultiplexed inputs :FLL preamplifiercolumn mux. (1 : 4)

3 Digital addressing circuitcontrolled by external Ck

[email protected] 10 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

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1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

Outline

1 1 : 128 TDM multiplexer topology

2 Readout chainSQUID stageCryogenic integrated circuit

3 Multiplexed signal, FLL and demultiplexing

[email protected] 11 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 36: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

Multiplexed time line

1 :128 multiplexing rate

[email protected] 12 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 37: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

Multiplexed time line

1 :128 multiplexing rate

The ASIC allows to reduce the part of the array readout

[email protected] 12 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 38: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

Flux Locked Loop (FLL) in multiplexed mode

FLL to linearize the "sine-like" SQUID transfer function

Analog FLL

bias ∫Vout

Rfb

φfb

φext

[email protected] 13 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 39: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

Flux Locked Loop (FLL) in multiplexed mode

FLL to linearize the "sine-like" SQUID transfer function

Multiplexed analog FLL

bias ∫Vout

Rfb

φfb

φext

Multiplexed mode : FLL operating point jump a φ0 between samples

[email protected] 13 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

Page 40: A 1: @let@token 128 multiplexing rate @let@token Time ...ltd16.grenoble.cnrs.fr/IMG/UserFiles/Images/9_128...TES TES prele@apc.in2p3.fr 5 / 16 A 1:128 multiplexing rate Time Domain

1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

"digital" FLL

biasG ADC

DAC∫ t −1 fb value (memory)

error signal ≈ 0

Rfb

φfb

φext

digital FLLoperating point storing

Warm readout/acquisition (FPGA + ADC/DAC)

Realtime feedback compensationimplemented into the FPGA

Series link with ASIC

Power supply ASICIRAP collaboration

[email protected] 14 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

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1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

Demultiplexing software

IRAP collaboration

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1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

Demultiplexing software

IRAP collaboration

[email protected] 15 / 16 A 1:128 multiplexing rate Time Domain SQUID Multiplexer - LTD16

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1 : 128 TDM multiplexer topologyReadout chain

Multiplexed signal, FLL and demultiplexing

Conclusion and outlook

Implementation and operation of a 1 : 128 TDM

2D multiplexing : SQUID stage + ASIC stage

Demultiplexing and digital FLL in a FPGA

To be done soon :1 Increase of multiplexing frequency2 Noise measurements without aliasing

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