Opto-Mechanics for SNAP at UM B. C. Bigelow, UM Physics 10/6/04
Opto-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 10/6/04 B. C. Bigelow - UM Physics
Focal 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 10/6/04 B. C. Bigelow - UM Physics
Previous FPA experience - IMACS 67 Mpx mosaic fully assembled 10/6/04 B. C. Bigelow - UM Physics
Previous FPA experience - IMACS NGC 2359, 15x15 arcmin 10/6/04 B. C. Bigelow - UM Physics
Large FPM review ACIS (AXAF Charge-coupled Imaging Spectrograph) 10/6/04 B. C. Bigelow - UM Physics
Kepler focal plane mosaic – 90 Mpx Large FPM review Kepler focal plane mosaic – 90 Mpx 10/6/04 B. C. Bigelow - UM Physics
GAIA astro focal plane mosaic GAIA astro focal plane, 180 CCDs, 2000x4500 px – 1.6Gpx 10/6/04 B. C. Bigelow - UM Physics
GAIA astro focal plane mosaic First GAIA development detectors have been delivered 10/6/04 B. C. Bigelow - UM Physics
Focal 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 10/6/04 B. C. Bigelow - UM Physics
MCT packaging designs H2RG package – 3 flat mounting pads and two locating pins 10/6/04 B. C. Bigelow - UM Physics
Discrete filter/apertures H2RG package with filter frame, filter, and aperture mask 10/6/04 B. C. Bigelow - UM Physics
IR sub-module Sub-array with CRICs, flex circuits, connectors, local IR electronics (cold), sub-plate heater 10/6/04 B. C. Bigelow - UM Physics
Focal plane fully populated 10/6/04 B. C. Bigelow - UM Physics
SNAP 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 10/6/04 B. C. Bigelow - UM Physics
Secondary Support Structure Secondary mirror support FEA model 10/6/04 B. C. Bigelow - UM Physics
TMA-63 telescope structure 10/6/04 B. C. Bigelow - UM Physics
TMA-65 telescope structure 10/6/04 B. C. Bigelow - UM Physics
TMA-65 telescope structure 10/6/04 B. C. Bigelow - UM Physics
Spectro installed FP assembly with spectrograph included (note redundant str.) 10/6/04 B. C. Bigelow - UM Physics
SNAP 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) 10/6/04 B. C. Bigelow - UM Physics
Misc. opto-mechanics Other sub-systems: Alternative shutter designs Alternative telescope baffles Calibration systems, projector optics, sources (LEDs) 10/6/04 B. C. Bigelow - UM Physics
Alternate shutters Rotating barrel shutter 10/6/04 B. C. Bigelow - UM Physics
Telescope lower baffle Baffles fully enclose optical system, FPA 10/6/04 B. C. Bigelow - UM Physics
Future 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 10/6/04 B. C. Bigelow - UM Physics