1 / 11

Characterization of 1.7um cutoff detectors for SNAP

Characterization of 1.7um cutoff detectors for SNAP. Roger Smith Caltech. SuperNova / Acceleration Probe. A 2m class wide field survey telescope in L2 orbit…. …will use supernovae and gravitational lensing to begin to unravel the mysteries of Dark Energy and Dark Matter.

amora
Télécharger la présentation

Characterization of 1.7um cutoff detectors for SNAP

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. Characterization of 1.7um cutoff detectors for SNAP Roger Smith Caltech Scientific DetectorWorkshop, 2005 Taormina

  2. SuperNova / Acceleration Probe A 2m class wide field survey telescope in L2 orbit… …will use supernovae and gravitational lensing to begin to unravel the mysteries of Dark Energy and Dark Matter.

  3. SuperNova / Acceleration Probe No cryogens Precision photometery … <2% error, including systematics

  4. Guiders (4) 36 NIR Detectors 3 bandpasses Spectrograph slit 560mm diameter 36 CCDs, 6 bandpasses Mixed CCD and NIR focal plane • 36 x 2Kx2K NIR arrays • 1.7um cutoff • Radiative cooling to 120-140K • 3 NIR bandpasses • Fixed filters • 18-20um pixels under-sample diffraction profile Caltech U.Michigan IDTL JPL GSFC

  5. Smaller telescope, cheaper mission SNAP Spec. QE Without AR Coating RSC RSC WFC3-094 SUBSTRATE REMOVED (DCL) Substrate removed with 1.7um AR coat

  6. Intra-Pixel Response[Total signal from 5um spot, vs. position] HgCdTe Raytheon Rockwell

  7. Dark Current vs T

  8. CDS noise

  9. Fowler Sampled noise (spatial)

  10. Cosmic Rays Raytheon HgCdTe Single 1000s dark (CDS) Rockwell HgCdTe Difference of 1000s darksFowler 32, 80K

  11. Best efforts so far… * Manufacturer’s measurement

More Related