Post on 01-Feb-2016
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Opto-Mechanics for SNAP at UMOpto-Mechanics for SNAP at UM
B. C. Bigelow, UM Physics
10/6/04
210/6/04 B. C. Bigelow - UM Physics
Opto-Mechanics for SNAP at UMOpto-Mechanics for SNAP at UM
Overview of talk:
• Design of focal plane mosaic components and assemblies
• Design and analysis of telescope and instrument structures
• Optics – support of optics specifications and procurement
• Design of misc. mechanics and sub-systems
310/6/04 B. C. Bigelow - UM Physics
Focal Plane MosaicsFocal Plane Mosaics
Focal Plane Mosaics:
• Previous experience with FPM
• Large focal plane mosaic review for SNAP
• MCT and CCD packaging designs and FEA
• Design of discrete filter frames, aperture masks
• Design of sub-arrays and FPM assemblies
• More at http://www.physics.lsa.umich.edu/bigelow/snap/index
410/6/04 B. C. Bigelow - UM Physics
Previous FPA experience - IMACSPrevious FPA experience - IMACS
67 Mpx mosaic fully assembled
510/6/04 B. C. Bigelow - UM Physics
Previous FPA experience - IMACSPrevious FPA experience - IMACS
NGC 2359, 15x15 arcmin
610/6/04 B. C. Bigelow - UM Physics
Large FPM reviewLarge FPM review
ACIS (AXAF Charge-coupled Imaging Spectrograph)
710/6/04 B. C. Bigelow - UM Physics
Large FPM reviewLarge FPM review
Kepler focal plane mosaic – 90 Mpx
810/6/04 B. C. Bigelow - UM Physics
GAIA astro focal plane mosaicGAIA astro focal plane mosaic
GAIA astro focal plane, 180 CCDs, 2000x4500 px – 1.6Gpx
910/6/04 B. C. Bigelow - UM Physics
GAIA astro focal plane mosaicGAIA astro focal plane mosaic
First GAIA development detectors have been delivered
1010/6/04 B. C. Bigelow - UM Physics
Focal Plane MosaicsFocal Plane Mosaics
Focal Plane Mosaics:
• Previous experience with FPM
• Large focal plane mosaic review for SNAP
• MCT and CCD packaging studies
• Design of discrete filter frames, aperture masks
• Design of sub-arrays and FPM assemblies
• Files at http://www.physics.lsa.umich.edu/bigelow/snap/index
1110/6/04 B. C. Bigelow - UM Physics
H2RG package – 3 flat mounting pads and two locating pins
MCT packaging designsMCT packaging designs
1210/6/04 B. C. Bigelow - UM Physics
Discrete filter/aperturesDiscrete filter/apertures
H2RG package with filter frame, filter, and aperture mask
1310/6/04 B. C. Bigelow - UM Physics
IR sub-moduleIR sub-module
Sub-array with CRICs, flex circuits, connectors, local IR electronics (cold), sub-plate heater
1410/6/04 B. C. Bigelow - UM Physics
Focal plane fully populatedFocal plane fully populated
1510/6/04 B. C. Bigelow - UM Physics
SNAP structuresSNAP structures
Design and analysis of structures:
• Space frames and trusses for OTA
• Fold and tertiary support trusses
• Focal plane support truss
• Spectrograph support truss
• Athermal struts
• Composite truss nodes
• Files at http://www.physics.lsa.umich.edu/bigelow/snap/index
1610/6/04 B. C. Bigelow - UM Physics
Secondary Support StructureSecondary Support Structure
Secondary mirror support FEA model
1710/6/04 B. C. Bigelow - UM Physics
TMA-63 telescope structureTMA-63 telescope structure
1810/6/04 B. C. Bigelow - UM Physics
TMA-65 telescope structureTMA-65 telescope structure
1910/6/04 B. C. Bigelow - UM Physics
TMA-65 telescope structureTMA-65 telescope structure
2010/6/04 B. C. Bigelow - UM Physics
Spectro installedSpectro installed
FP assembly with spectrograph included (note redundant str.)
2110/6/04 B. C. Bigelow - UM Physics
SNAP opticsSNAP optics
Optics:
• Supporting development of telescope optics specifications
• mirror figure specifications
• mirror AR coatings
• Opto-mechanics for mirrors
• fold mirror models
•Participating in TDM/TPF-C mirror design reviews
• at request of M. Lampton and E. Cohen (JPL)
2210/6/04 B. C. Bigelow - UM Physics
Misc. opto-mechanicsMisc. opto-mechanics
Other sub-systems:
• Alternative shutter designs
• Alternative telescope baffles
• Calibration systems, projector optics, sources (LEDs)
2310/6/04 B. C. Bigelow - UM Physics
Alternate shuttersAlternate shutters
Rotating barrel shutter
2410/6/04 B. C. Bigelow - UM Physics
Baffles fully enclose optical system, FPA
Telescope lower baffleTelescope lower baffle
2510/6/04 B. C. Bigelow - UM Physics
Future workFuture work
• Focal Plane Mosaic
• Preliminary design (detector packages, sub-assys, baseplate)
• Fabricate prototype parts, vibration and/or thermal testing?
• Telescope Structures
• 2.25 - 2.5m telescopes
• Detail design of nodes, optics interfaces
• Carbon-fiber prototypes (nodes, struts, structures)
• Optics
• TDM/TPF-C developments, design reviews
• Review of commercial design studies
• Site visits to optics/OTA vendors