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Mid-InfRAred Camera wo LEns (MIRACLE) for SPICA. Takehiko Wada and team MIRACLE. Outline. Scientific target and Required Specification Current status of Conceptual Study System Resource Requirement Development plan Observing plan. Scientific Objectives/Targets &
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Mid-InfRAred Camera wo LEns (MIRACLE) for SPICA Takehiko Wada and team MIRACLE
Outline • Scientific target and Required Specification • Current status of Conceptual Study • System Resource Requirement • Development plan • Observing plan
Scientific Objectives/Targets & Required Specifications
Scientific Targets • Birth and evolution of galaxies in the dust obscured universe • Cosmic 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 MRD • Resolution of Birth and Evolution of Galaxies • Transmigration of Dust in the Universe • MIRACLE covers a part of one of threeMajor Objective of the MRD • Studies of Exoplanets and Solar Systems
Specification of Instrument • Wide wavelength coverage: 5-50um • Short (5-26um) and Long (20-38um, 38-50um) channel • Wide 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 galaxiesin 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
AKARI view of faint MIR galaxiesa starburst galaxy at zhot=0.6 Takagi et al., 2007, PASJ, 59, S557. 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.
Specification of Instrument Lowresolutionspectroscopy iswell fittoreveal thephysicalconditionofdust and molecule in the ISM. Ohyama et al., 2007, PASJ, 59, S441
Concept Study Current Status
Optics & Optical Elements Wide field optical system with diffraction limit performance without lens has been designed.
Detectors • 2Kx2K Si:As BIB detector for 5-26um • 1Kx1K Si:Sb BIB detector for 20-38um • 128x128 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 stage • Detector are placed on 4K and 1.7K stage • Detector power of mW • Parasitic thermal input of mW
Expected Performance • Telescope diffraction limited image quality cover 6x6 arcmin. FOV • Natural background limited sensitivity • え
Field-of-View Requirement • 6x6 arcmin FOV • Small 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 detector • 16 bits/pixel • Maximum 4 detector • Onboard data storing and compression • Peak rate 64Mbits/s • Average rate TBD
Warm Electronics • Heritage from AKARI/IRC-E concept • Heritage from ASTRO-H hardware (SpW based system)
Operation & Observing Mode • Imaging (including slit-less spectroscopy) • Dithering • Slew to adjacent field • Spectroscopy • Imaging and peak-up • Dithering • Step scan • Slow scan
Key Technical Issues & TRL • Optics • System high TRL • Filter (<28um) high TRL • Filter (>28um) low TRL • Mirrors high TRL • Detector • AKARI and Spitzer heritage high TRL • Wheels • Slit 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 • Detector • 2Kx2K Si:As • R&D for proto-type 850k$ • Proto-model 200k$/pcsx (2+1) • Flight-model 500k$/pcs x (2+1) • 1Kx1K Si:Sb • R&D for Proto-type 450k$ • Proto-model 350k$/pcs x (2+1) • Flight-model 500k$/pcs x (2+1)
Development Cost • Optics • System 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 TBD • Flight-model TBD
Development Cost • Optics • Filters (<30um) • Proto-modelTBD • Flight-model TBD • Filters (>30um) • R&D for Proto-type TBD • Proto-model TBD • Flight-model TBD
Development Cost • Mechanics • Wheel (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 TBD • Flight-model TBD
Development Cost • Structure • System • Integration • testing • Control electronics • Ground sport electronics • Ground sport software
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 ISAS • Science • Extra-galactic • Galactic • Hardware • System • Detector • Optics