1 / 15

The Morehead Saga

The Morehead Saga. (Frustrating) Tests of Integral Field Hexabundles for SOAR. Speeding up 4m telescope for $300K or $10K or …. $75K Research Corp. (1 st phase). Hexabundles. Fusing will trigger FRD. Deployable IFU. Four 4.5” diam. IFUs rove 10’x5’ >50” apart

tarala
Télécharger la présentation

The Morehead Saga

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Morehead Saga (Frustrating) Tests of Integral Field Hexabundles for SOAR

  2. Speeding up 4m telescope for $300K or $10K or … $75K Research Corp. (1st phase)

  3. Hexabundles

  4. Fusing will trigger FRD

  5. Deployable IFU • Four 4.5” diam. IFUs rove 10’x5’ >50” apart • Each fused bundle -> single fibers (U. Sydney collab.) • Each 61 fibers 0.45” • Measured 75% filling, 95% soon

  6. Prototype issues to fix $45 5-mm diam. achromat • Non-telecentricity & FRD (f/16.5 -> f/10) 0.”3 to 0.”45/pix • Scattered light & cross-talk • Positioner servo accuracy ok? • 0.3x0.9 arcsec2 error ellipse • Test jig ready to measure • Fiber routing/handling (presently just break fibers  ) bundle Probe near centre vs edge of 10x5’ fov

  7. Layout

  8. Lucky Imaging EMCCD acquisition/sky monitoring camera Gantry for Goodman

  9. Mounting fiber slit blocks • Interleave spectra from 4 blocks, total 61 • 3 broken fibers, a dozen diminished throughput

  10. Goodman “slit” now 100 microns wide -> higher spectral R Fibers

  11. Back illuminating

  12. Mangling a spectrograph • Remove cal lamp, slit, decker, off-slit viewer • Add fiber bundle feed through top, attach bundle to Morehead f/13.5 Cass. • Apogee 1530x1024 CCD covers 21“ diam @ 2.4”

  13. Long slit mode

  14. Fibers: dispersed daylight

  15. = sunlight (+ O3 + … ) Test on stars, Pne, mosaic to 1x1’ on Orion … But spectrograph very slow (collimator unreflective)

More Related