Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.9810s&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #98.10; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
A number of large format (1k × 1k and 2k × 2k) near-IR detectors manufactured by Teledyne Scientific & Imaging (formerly Rockwell Scientific) and Raytheon Vision Systems have been characterized as part of the near infrared R&D effort for SNAP (the SuperNova / Acceleration Probe). The majority of these detectors are hybridized HgCdTe focal plane arrays with a sharp high-wavelength cutoff at 1.7 μm. This particular cutoff wavelength provides a sufficiently deep reach in redshift, z, while it allows at the same time low dark current operation of the passively cooled detectors at about 140 K. Precision photometry is essential to the science goals of SNAP and will require low noise, high QE detectors with a high degree of sub-pixel uniformity. In this poster presentation the science driven requirements for the near infrared detectors are summarized and several key findings obtained during the SNAP R&D program will be discussed. In particular, high QE (>95%) has been measured in substrate removed AR coated engineering grade SNAP devices and it was shown that intra-pixel variations in high QE devices are small (≈1%). This ensures that SNAP can meet the photometric S/N goals.
Schubnell Michael
SNAP Collaboration
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