mmirs 1 mmirs mmt and magellan infrared spectrograph brian mcleod
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MMIRS 1
MMIRS MMT and Magellan Infrared
Spectrograph
Brian McLeod
MMIRS 2
Science Drivers – Brown dwarfs
MMIRS 3
Science Drivers – Star formation at high redshift
MMIRS 4
Basic Operational Modes
• Imaging• 7 x 7 arcminute FOV• 0.2 arcsecond pixels• Y, J, H & K wavelength coverage
• Spectroscopy• Multi-slit (4’x7’) or longslit (7’)
– J, H, K @ R=3000– H+K @ R=1400
MMIRS 5
Optical Layout
Corrector~20C
Slit Plane
Collimator
Camera
Detector
Sec II.1
MOS Section Camera Section77K
Design by H. Epps and D. Fabricant
MMIRS 6
Slit MaskDetector
MMIRS 7
CorrectorOptics(warm)
Guider/WFS(warm)
Detector
LN2 Tank/Optical Bench
Collimator
Camera
Slit Masks
Dekker
MMIRS 8
MMIRS EXTERIOR
TRUSS ELECTRONICSRACKS
(2) GUIDER/WFS
MOSSECTION
DETECTORPRE-AMP’S
CAMERA SECTION
TELESCOPE TRUSS- WELDED ASSEMBLY WITH BOLT INTERFACES TO TELESCOPE & CRYOSTAT
ELECTRONICS RACK TRUSS
(2)
MOS SECTION
MMIRS 9
MOS Wheel
MMIRS 10
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 Late 2007
MMIRS 11
Cryogenic benchesIn fab by Meyer ToolExpected delivery June 2006
MMIRS 12
Vacuum housings
• Contract awarded to Atlas Technologies
• Delivery expected August 2006
MMIRS 13
CartIn fabrication.
Delivery expected in approx one month.
MMIRS 14
OPTICS STATUSLens Status
1 IN POLISHING
2 IN COATING
3 ASPHERE--DROPPED WHEN NEARLY
COMPLETE – START OVER
4 RECEIVED
5 ABOUT TO BE COATED
6 ABOUT TO BE COATED
7 RECEIVED
8 IN COATING
9 RECEIVED
10 RECEIVED
11 RECEIVED
12 IN COATING
13 RECEIVED
14 RECEIVED
LENS9
LENS13
MMIRS 15
Grisms
Original Plan
JH R=1200HK R=1200J R=3000H R=3000K R=3000
Revised Plan
HK Prism R=1200 master already made for
UF at RGL. MMIRS will purchase identical.
J,H,K R=3000 3 order grism Master being made by
RGL for Florida.Option for cross-dispersion
MMIRS 16
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
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