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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

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Opto mechanics for snap at um

Opto-Mechanics for SNAP at UM

B. C. Bigelow, UM Physics

10/6/04


Opto mechanics for snap at um1
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

B. C. Bigelow - UM Physics


Focal plane mosaics
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

B. C. Bigelow - UM Physics


Previous fpa experience imacs
Previous FPA experience - IMACS

67 Mpx mosaic fully assembled

B. C. Bigelow - UM Physics


Previous fpa experience imacs1
Previous FPA experience - IMACS

NGC 2359, 15x15 arcmin

B. C. Bigelow - UM Physics


Large fpm review
Large FPM review

ACIS (AXAF Charge-coupled Imaging Spectrograph)

B. C. Bigelow - UM Physics


Large fpm review1
Large FPM review

Kepler focal plane mosaic – 90 Mpx

B. C. Bigelow - UM Physics


Gaia astro focal plane mosaic
GAIA astro focal plane mosaic

GAIA astro focal plane, 180 CCDs, 2000x4500 px – 1.6Gpx

B. C. Bigelow - UM Physics


Gaia astro focal plane mosaic1
GAIA astro focal plane mosaic

First GAIA development detectors have been delivered

B. C. Bigelow - UM Physics


Focal plane mosaics1
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

B. C. Bigelow - UM Physics


Mct packaging designs
MCT packaging designs

H2RG package – 3 flat mounting pads and two locating pins

B. C. Bigelow - UM Physics


Discrete filter apertures
Discrete filter/apertures

H2RG package with filter frame, filter, and aperture mask

B. C. Bigelow - UM Physics


Ir sub module
IR sub-module

Sub-array with CRICs, flex circuits, connectors, local IR electronics (cold), sub-plate heater

B. C. Bigelow - UM Physics


Focal plane fully populated
Focal plane fully populated

B. C. Bigelow - UM Physics


Snap structures
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

B. C. Bigelow - UM Physics


Secondary support structure
Secondary Support Structure

Secondary mirror support FEA model

B. C. Bigelow - UM Physics


Tma 63 telescope structure
TMA-63 telescope structure

B. C. Bigelow - UM Physics


Tma 65 telescope structure
TMA-65 telescope structure

B. C. Bigelow - UM Physics


Tma 65 telescope structure1
TMA-65 telescope structure

B. C. Bigelow - UM Physics


Spectro installed
Spectro installed

FP assembly with spectrograph included (note redundant str.)

B. C. Bigelow - UM Physics


Snap optics
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)

B. C. Bigelow - UM Physics


Misc opto mechanics
Misc. opto-mechanics

  • Other sub-systems:

    • Alternative shutter designs

    • Alternative telescope baffles

    • Calibration systems, projector optics, sources (LEDs)

B. C. Bigelow - UM Physics


Alternate shutters
Alternate shutters

Rotating barrel shutter

B. C. Bigelow - UM Physics


Telescope lower baffle

Baffles fully enclose optical system, FPA

B. C. Bigelow - UM Physics


Future work
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

B. C. Bigelow - UM Physics


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