Mid-InfRAred Camera wo LEns (MIRACLE) for SPICA

Takehiko Wada

and

team MIRACLE

Outline

Scientific target and Required Specification

Current status of Conceptual StudySystem Resource RequirementDevelopment planObserving plan

Scientific Objectives/Targets&

Required Specifications

Scientific Targets

Birth and evolution of galaxies in the dust obscured universeCosmic star formation history large scale structure and galaxy evolution

Formation and evolution of dust in the universe Interstellar medium in the Milky way and

near-by galaxies

Consistency with MRD

MIRACLE is the key device for two of three Major Objective of the MRDResolution of Birth and Evolution of

GalaxiesTransmigration of Dust in the Universe

MIRACLE covers a part of one of three Major Objective of the MRDStudies of Exoplanets and Solar Systems

Specification of Instrument

Wide wavelength coverage: 5-50umShort (5-26um) and Long (20-38um, 38-

50um) channelWide field of view: 4x4arcsec (6x6 goal)Multi-band imaging: 6 filters (18 goal)Low resolution spectroscopy: R=5-200

Specification of Instrument

Wide and contiguous wavelength coverage (5-38um) is required to reveal the redshift and star-formation activity in the dust obscured galaxies in the range of redshift z=0-4

Specification of Instrument

Wide field of view is required for superior mapping speed in wavelength shorter than 20um compare to the JWST/MIRI

Specification of Instrument

Wide field of view is required to cover the proto-cluster and the

surrounding region at the redshift z>1

Specification of Instrument

Multi-band imaging is required for SED fitting to reveal the redshift and physical condition of distant galaxies through the wide field survey.

Ｔａｋａｇｉ et al., 2007, PASJ, 59, S557.

AKARI view of faint MIR galaxiesa starburst galaxy at zhot=0.6

Specification of Instrument

Low resolution spectroscopy is well fit to reveal

the physical condition of dust and molecule in the ISM.

Ohyama et al., 2007, PASJ, 59, S441

Concept StudyCurrent Status

Optics & Optical Elements

Wide field optical system with diffraction limit performance without lens has been designed.

Detectors

2Kx2K Si:As BIB detector for 5-26um1Kx1K Si:Sb BIB detector for 20-38um128x128 Si:X BIB detector for 38-50um

Heritage of AKARI/IRC and Spitzer/IRS.

Developments for JWST/MIRI, SOFIA, and FIDTAP.

Volume & Structure

えをはりつける

Thermal Design

Optics are placed on 4K stageDetector are placed on 4K and 1.7K

stageDetector power of mW Parasitic thermal input of mW

Expected Performance

Telescope diffraction limited image quality cover 6x6 arcmin. FOV

Natural background limited sensitivityえ

Resource Requirements

Field-of-View Requirement

6x6 arcmin FOVSmall telescope distortion (inside 9

arcmin from the center)Two set of FOV (for Short and Long

channel)

Thermal & Cryogenic Requirement

4K stage for optics (small power)4K stage for Short channel detector (xx

mW)1.7K stage for Long channel detector (xx

mW)20K stage for buffer amp (xx mW)

Pointing / Attitude control Requirement

Xx arcsec stability for x00 sec (for shortest wavelength)

Xx arcsec absolute pointing (for cross-slit direction)

Xx arcsec relative pointing (for slit maping)

Quick pointing slew for xx arcmin (dithering observation)

Structural Requirement

No special requirement

Data Generation Rate & Data Handling Requirement

1 M pixel/s sampling for each detector16 bits/pixelMaximum 4 detectorOnboard data storing and compressionPeak rate 64Mbits/sAverage rate TBD

Warm Electronics

Heritage from AKARI/IRC-E conceptHeritage from ASTRO-H hardware (SpW

based system)

Operation & Observing Mode

Imaging (including slit-less spectroscopy)DitheringSlew to adjacent field

Spectroscopy Imaging and peak-upDitheringStep scanSlow scan

Development and Test Plan

Key Technical Issues & TRL

OpticsSystem high TRLFilter (<28um) high TRLFilter (>28um) low TRLMirrors high TRL

Detector AKARI and Spitzer heritage high TRL

WheelsSlit and Filter AKARI and Planet-C heritage (high)Grating wheel (mid TRL)

Development Plan

書き方を相談する。

Test & Verification Plan

書き方を相談する。

Development Cost

Detector2Kx2K Si:As

R&D for proto-type 850k$Proto-model 200k$/pcsx (2+1)Flight-model 500k$/pcs x (2+1)

1Kx1K Si:SbR&D for Proto-type 450k$Proto-model 350k$/pcs x (2+1)Flight-model 500k$/pcs x (2+1)

Development Cost

OpticsSystem design

R&D for Proto-type 500 万円Proto-model 500 万円Flight-model 500 万円

Mirrors and support R&D for Proto-type TBD 万円Proto-model TBDFlight-model TBD

Development Cost

OpticsFilters (<30um)

Proto-model TBDFlight-model TBD

Filters (>30um)R&D for Proto-type TBDProto-model TBDFlight-model TBD

Development Cost

MechanicsWheel (filter and slit)

R&D for Proto-type 500 万円Proto-model 500 万円Flight-model 500 万円

Grating wheel R&D for Proto-type TBD 万円Proto-model TBDFlight-model TBD

Development Cost

StructureSystem

Integration testing

Control electronicsGround sport electronicsGround sport software

Observing Program

Observation Plan to perform Science Targets

何を書いたらよいか聞く

Outline of Ground Data Processing

Similar to AKARI/IRC

Organization & Structure for Development

Core ISASScience

Extra-galacticGalactic

HardwareSystemDetectorOptics

Summary