MMIRS MMT and Magellan Infrared Spectrograph

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MMIRS MMT and Magellan Infrared Spectrograph

• Brian McLeod

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Science Drivers Brown dwarfs
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Science Drivers Star formation at high redshift
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Basic Operational Modes

• Imaging
• 7 x 7 arcminute FOV
• 0.2 arcsecond pixels
• Y, J, H K wavelength coverage
• Spectroscopy
• Multi-slit (4x7) or longslit (7)
• J, H, K _at_ R3000
• HK _at_ R1400

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Optical Layout
Sec II.1
Camera
Slit Plane
Detector
Corrector 20C
Collimator
Camera Section 77K
MOS Section
Design by H. Epps and D. Fabricant
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Slit Mask
Detector
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Detector
Collimator
Camera
Slit Masks
Corrector Optics (warm)
LN2 Tank/ Optical Bench
Dekker
Guider/WFS (warm)
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MMIRS EXTERIOR
TELESCOPE TRUSS- WELDED ASSEMBLY WITH BOLT
INTERFACES TO TELESCOPE CRYOSTAT
MOS SECTION
(2) GUIDER/ WFS
ELECTRONICS RACKS
MOS SECTION
TRUSS
ELECTRONICS RACK TRUSS (2)
DETECTOR PRE-AMPS
CAMERA SECTION
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MOS Wheel
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Project Timeline

• TSIP Proposal Feb 2003
• Start of Work Dec 2003
• PDR July 2004
• CDR May 2005
• Optics ordered August 2005
• Begin manufacture Oct 2005
• Begin integration and test Summer 2006
• Delivery to MMT gtLate 2007

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Cryogenic benches
In fab by Meyer Tool Expected delivery June 2006
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Vacuum housings

• Contract awarded to Atlas Technologies
• Delivery expected August 2006

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Cart

• In fabrication.
• Delivery expected in approx one month.

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OPTICS STATUS
LENS9
LENS13
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Grisms

• Original Plan
• JH R1200
• HK R1200
• J R3000
• H R3000
• K R3000

• Revised Plan
• HK Prism R1200
• master already made for UF at RGL. MMIRS will
  purchase identical.
• J,H,K R3000 3 order grism
• Master being made by RGL for Florida.
• Option for cross-dispersion

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Plan for next 6 months

• Detector characterization in test dewar
• Assemble main housings and G-10 rings
• Thermal/vacuum testing in September
• Build and test MOS wheel mechanism
• Finish remaining mechanical drawings