Difference between revisions of "SLAC-2017:Telescopes and Receiver Optics Parallel Session"

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Back to [[SLAC-2017:_Cosmology_with_CMB-S4| SLAC-2017 main page]]
 
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==  Telescope Optics Parallel Session ==
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==  Large Aperture Telescope Optics Parallel Session ==
 
Post session talks here.
 
Post session talks here.
  

Revision as of 07:44, 28 February 2017

Back to SLAC-2017 main page

Large Aperture Telescope Optics Parallel Session

Post session talks here.

Receiver & Small Aperture Optics Parallel Session

Post session talks here.

Notes from sessions

Take notes here.

Requirements flow from science to telescopes

beam size & sensitivity vs. freq

  • min sizes of telescopes
  • number of detectors in each band on each telescope size

grouping of bands on telescopes

  • matched beams?
  • simultaneous measurements with concentric beams?

scattering & sidelobe level, stability (mechanical & thermal)

  • how to specify this

scan speed, pattern vs. freq

  • pointing & tracking requirements
  • does scan strategy need multiple, independent mounts?

calibration

  • which sources do we need to see? how often?
  • do we need planets?

Site & ops to telescopes

site specific conditions

  • temp, seismic, insolation, rain/snow

power constraints

shipping

uptime & maintainability

  • do we need several telescopes/mounts?

Requirements flow within telescopes (trade studies, allocations, good practice, prejudice)

tel size vs. ell

  • small tels for low ell?

reflectors vs. refractors

tel optical layout

tel mount layout

number of each type of telescope

shield config

can we tolerate panel gaps on big telescopes?

boresight rotation to fix tel errors?

manufacturability

Requirements flow to/from cameras

subfield cameras? (yes requires 1st lens at tel focus)

tel focal ratio (not necessarily same as at detectors)

limits/rqts on camera orientation/motion/accel

tel boresight rotation to fix residual camera beam/pol errors

  • instrument rotation may be easier

drive noise (EMI, vibration, magnetic)

access to camera (frequency, specific orientation)

Action items/Next steps

Summarize action items here