litebird leading role of jaxalitebird.isas.jaxa.jp/wiki/local/20190702lb-jaxa-ys.pdf · – f#3.0...

LiteBIRDleading role of JAXA

1

2019-07-02

Yutaro Sekimoto, Tadayasu Dotani, Masahiro Tsujimoto,

Ken Ebisawa, Takashi Hasebe, Masashi Hazumi, Toru Kaga,

Kazuhisa Mitsuda, Norio Okada, Yasuhiro Murata, Yoichi Sato,

Keisuke Shinozaki, Hayato Takakura, Yoichi Takeda, Noriko Yamasaki

Japan Aerospace Exploration Agency (JAXA)

2019/07/02 LiteBIRD kick-off symposium : JAXA

LiteBIRD

LFT (5K)

High Gain (HG) antenna (X-band)

MHFT (5K)

V-grooves(radiative cooler)

SVM/BUS

160K90K30K

Spacecraft

2019/07/02 LiteBIRD kick-off symposium : JAXA 2

JAXAH3

LFT (Low frequency telescope) 34 – 161 GHz : Synchrotron + CMB

MHFT (middle and high frequency telescopes) 89 – 448 GHz : CMB + Dust

4.5 m

TES focal plane 0.1K(not seen)

LiteBIRDLiteBIRD product tree

3

MHFT 89 – 448 GHz

2019/07/02

Primarymirror

Secondary mirror

HWP

Cold aperture stop

LF-FP

300K ring

Sinuous Antenna for broadband Tri-chroic pixels

Siliconlenslet

LFT F/# 3.0

LiteBIRD kick-off symposium : JAXA

LFT 34 – 161 GHz

LiteBIRDLiteBIRD basic parameters


Low Frequency Telescope (LFT) Middle & High Frequency Telescope (MHFT)

Frequency 34 ~ 161 GHz 89 ~ 448 GHzfield of view 20 deg ×10 deg φ 28 deg

aperture diameter 400 mm 300 mm

angular resolution 20 ~ 70 arcmin 18 ~ 42 arcmin

rotational HWP 88 rpm 170 rpm

number of detectors 1248 3428

Uncertainty of r

Observation period

Scan

Sensitivity

pointing knowledge

data transfer

mass

electrical power

10 GByte/day

2.6 ton

3.0 kW

δr < 1 × 10^(-3)3 years

L2 Lissajous, precession angle 45 deg, spin angle 50 deg (0.1 rpm)

2 μK·arcmin

< 2.1 arcmin

focal plane arraybath temperature 100 mK

f_{knee} < 20 mHz

0

5

10

15

20

25

30 60 120 240 480

NET

[uK/

sqrt(

Hz)

]

Frequency [GHz]

T. Hasebe et al.

LiteBIRDOpt-Cryo-Mechanical design ofLow frequency telescope (LFT)

– Aperture diameter 400 mm– Field of view 20 deg x 10 deg– F#3.0 & crossed angle of 90 degree– All 5K parts are made of Aluminum– S. Kashima et al. 2018 Appl. Optics – Y. Sekimoto et al. 2018 SPIE

5

16:45:24

cdf30ep400xet75 et=7dB img=300 cross=90

Position: 2

kas 05-Apr-18

250.00 MM 1.23m

1.23m

F#=3.0

Bipods(5K – 300K)

300K ring(φ1800)

HWP

Focal Plane(0.1K)

Primary(5K)

Secondary (5K)

Cold aperture stop

5K frame

Optical benchFor MHFT

LFT

secondary

primary

Kinematic mount


LiteBIRDLFT ¼ scaled model

far sidelobe measurements

2019/07/02 6

H. Takakura et al. 2019 IEEE TST submitted

Far sidelobe of LFT has been measured to be less than -60 dB even at the outer edge of the field of view (the edge of the focal plane).

220/4 = 55 GHz

Focal plane

Fore-hood


A frame structure and mirrors have been designed and machined by Advanced Machine shop of ISAS/JAXA

LiteBIRDFar sidelobe measurements


706050403020100/dB

Pos. A, H-pol V-pol

Pos. B, H-pol V-pol

Pos. C, H-pol V-pol

-60

-40

-20

0V-polH-pol

-56 dB

Pos. A

-60

-40

-20

0 Pos. B

-60

-40

-20

0

-60 -40 -20 0 20 40 60

Inte

nsity

/dB

Θx /deg

Pos. C

H. Takakura et al. 2019 IEEE TST submitted

yFP

A

B

CH-pol

V-polxFP

706050403020100

/dB

-25 dB -25 dB

-24 dB -24 dB

-25 dB -26 dB

Pos. A, H-pol V-pol

Pos. B, H-pol V-pol

Pos. C, H-pol V-pol

706050403020100

/dB

-90

-60

-30

0

-40 -20 0 20 40

Inte

nsity

/dB

Θφ=45° /deg

Co-polX-polX-pol w/ wire grid-20 dB

Cross polarization

With wiregrid

220 GHz/4 = 55 GHz

LiteBIRD

4.8 K

20 K

100 K

200 K

290 K

1.8 K

0.1 K

0.3 K

ESA

CNES

JAXA

NASA

Shield cooler

4KJT

Driver Driver Driver Driver

ADR

DriverDriver

ADR

2019/07/02 8

Cryo-coolers


Heatexchangers

2ST

4K-JT

2ST

• 4K Joule-Thompson cooler (4K-JT)• Cooling power : 40 mW at 4.5 K• Smiles, Hitomi, XRISM, SPICA, Athena

• 2 stage Stirling cooler (2ST)• Cooling power: 200 mW at 20K• Akari, Smiles, Hitomi, XRISM, SPICA

• Cooling chain – core technology program (CC-CTP)• Collaboration with CEA for Athena, SPICA, LiteBIRD

Y. Sato et al. Cryogenics 2012

Y. Sato et al. Cryogenics 2014

ADR : Adiabatic Demagnetization Refrigerator

LiteBIRDPLM thermal design with V-groove


T. Hasebe et al. 2019 JATIS submitted

LiteBIRDInterfaces

2019/07/02 10LiteBIRD kick-off symposium : JAXA

LF - FPCold readout

Warm readout

LFT

Cryo-structure

Electronics

MHFT ADRs

MHF - FPCold readout

PLM

1.8K ADR

Shield cooler

Eu NASA JAXA CSA

0.1KADR

0.3 K

1.8K stage

4.8K

0.1K LF-FP

4.8KJT cooler

LP Filters 1.8 K

LF SQUID1.8KADR

1.8K stage

0.1K HF-FP

0.3 K stage

LP Filter 1.8 K

MHF SQUID

wire

har

ness

MHFT LFT 5K

wire

har

ness

Thermalstraps

Eu NASA JAXA

0.3 K stage

Magnetic shield Magnetic shield

MHFT

LF-Focal plane420 mm

210mm

Warm Electronics

Sub-Kelvin coolers (ADRs)

LF-PMU (HWP)

Mechanical I/FMech. I/F btwPLM and SVM

φ1970

Mech. I/F at 5Kφ1600

LFTMHFT

750 950

1700

1700

Thermal I/F0.1KADR

0.3 K

1.8K stage

4.8K

0.1K LF-FP

4.8KJT cooler

LP Filters 1.8 K

LF SQUID1.8KADR

1.8K stage

0.1K HF-FP

0.3 K stage

LP Filter 1.8 K

MHF SQUID

wire

har

ness

MHFT LFT 5K

wire

har

ness

Thermalstraps

Eu NASA JAXA

0.3 K stage

Magnetic shield Magnetic shield

Electrical I/FPMU Controller

MHFT

PMU ControllerLFT JT driver

ESA NASA JAXA

Squid controllerLFT

CSA

warm readoutMHFT

ADR 1.8K driver

ADR 0.1K driver

Shield cooler driver

2ST driver

Eu

PLM power distrib.

Cold heater controller LFT

Warm heater controller

Cold heater controller MHFT

Squid controllerMHFT

warm readoutLFT

Power DSTBData Recorder

MPU

PLM electronics in SVM structure

PLM ICU

Power bus

Command & data bus

Clock bus

SVM

PYLD-IF

MDP

Optical I/F-60

-40-56 dB

Pos. A

-60

-40

-20

0 Pos. B

-40

-20

0

Inte

nsity

/dB

Pos. C

PMU ControllerMHFT

PMU ControllerLFT

JT driver

ESA NASA JAXA CSA

ADR 1.8K driver

ADR 0.1K driver

Shield cooler driver

2ST driver

Eu

Cold heater controller LFT

Warm heater controller

Cold heater controller MHFT

Squid controllerLFT

warm readoutMHFT

Squid controllerMHFT

warm readoutLFT

Power DSTB

Data Recorder

MPU

PLM electronics in SVM structure

PLM ICU

Command & data bus

SVM

PYLD-IF

MDP

SpW

clock

JAXA interfaces Electronical interfaces Thermal interfaces

• System requirements (RPR-LB16003A)• Payload joint study group (PLM JSG)

LiteBIRDStability and Risk mitigation

• Microphonic vibration• Temperature stability• EMC/EMI• Pointing stability


cooler pedestal

5K LFT and HFT

LF FPHF FPFP I/F

PLM/SVMMech. I/Fφ1970

300K PLM componentsRadiator

SVM/BUS

LHP LHP

Radiator

PLM/SVMThermal I/F

Y. Takei et al. 2018 JATIS

Power spectrum of micro-phonic vibration of Hitomi

LiteBIRD


LiteBIRD

HFTMHF focal planeicld. cold readout HFT AIV

MHFT calibration

LF antenna

LF focal planeincld. cold readout

LFT AIV LFT calibration

JT/2ST coolers

PLM AIV

SVM

System

Eu NASA JAXA

warm readout

CSA

warm readout

Cryo GSE

Cryo-AIVV-groove

Cryo-structure

Shield cooler

MFT

MFT AIV

LF PMU

ADR 1.8K

ADR 0.1KADRs AIV

MHF FP readoutAIV

ESA

LF FP readoutAIV JAXA 13m chamber

JAXA 6m chamber

KEK dedicated chamber

JAXA 6m chamber

PLM Integration and Verification

2019/07/02 13

30K umbrella+ MLI

5K umbrella+ absorber

IR truck (100K)

30K V-groove

90K V-groove

180K V-groove

5K-10K hot/cold load

PLM Verification with Cryogenic Umbrellain JAXA 6-m diameter space chamber

• Microphonic vibration• Temperature stability• 1/f noise• EMC/EMI


AIV : assembly, integration, verification

LiteBIRDSystem Cryogenic Verification

HFTMHF focal planeicld. cold readout HFT AIV

MHFT calibration

LF antenna

LF focal planeincld. cold readout

LFT AIV LFT calibration

JT/2ST coolers

PLM AIV

SVM

System

Eu NASA JAXA

warm readout

CSA

warm readout

Cryo GSE

Cryo-AIVV-groove

Cryo-structure

Shield cooler

MFT

MFT AIV

LF PMU

ADR 1.8K

ADR 0.1KADRs AIV

MHF FP readoutAIV

ESA

LF FP readoutAIV JAXA 13m chamber

JAXA 6m chamber

KEK dedicated chamber

JAXA 6m chamber


30K umbrella+ MLI

5K umbrella+ absorber

30K V-groove

90K V-groove

180K V-groove

3K-10K hot/cold load

Truck (100 K) for JAXA 13 m space chamber

100K Shroud

30K cooler 4K cooler

JAXA 13m space chamber

Compressor

Compressor

JAXA 13 m space chamber

End-to-End verification• Microphonic vibration• Temperature stability• 1/f noise• Optical efficiency• EMC/EMI

LiteBIRD

LiteBIRDSummary

JAXA is responsible for – System integration and verification– SVM/BUS– PLM/mission integration– Low Frequency Telescope– Cryo-structure– Launch and Satellite Operation

In collaboration with– NASA, CNES, ESA, CSA, ASI, DLR, UK-SA, NOSA, SRON, INTA, INFN, SNSA – IPNS/KEK, Kavli IPMU/U. Tokyo, Okayama U., Nagoya U., Kitasato U., – Industrial partners

2019/07/02 15LiteBIRD kick-off symposium : JAXA

LFT (5K)

MHFT (5K)

V-grooves

SVM/BUS

TES focal plane 0.1K

(not seen)

litebird leading role of jaxalitebird.isas.jaxa.jp/wiki/local/20190702lb-jaxa-ys.pdf · – f#3.0...

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