Near Infrared System for SNAP*. Vic Scarpine FNAL SNAP Electronics Meeting Feb. 11, 2003 * Much material obtained from Tarle and Bebek SNAP DOE talks. State-of-the-art 2k x 2k HgCdTe detector with 1.7 m m cutoff under development by RSC. NIR System Concept. 150 NIR Megapixels:
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FNAL SNAP Electronics Meeting
Feb. 11, 2003
* Much material obtained from Tarle and Bebek SNAP DOE talks
State-of-the-art 2k x 2k HgCdTe detector with 1.7 mm cutoff under development by RSCNIR System Concept
Hg(1-x)CdxTe – cdetermined by x; this determines operating temperature.
Rockwell Science Center (RSC) is the principal, recognized source for Mercury Cadmium Telluride (HgCdTe) infrared focal plane arrays (FPAs).
RSC has developed devices (NICMOS 256 x 256 FPAs, WFC3 1024 x 1024) for the IR channel on HST. Also U Hawaii, ESO, Subaru, NGST…
The DCL currently supports the characterization of HgCdTe detectors for the Hubble Space Telescope Wide Field Camera 3 instrument.
The Rockwell HgCdTe devices are SNAP baseline choice for the NIR system.
WFC3 MBE material with 1.7 mm cutoff in the NGST 2k x 2k format (under development) is a very good match for SNAP.
• Read Noise 5 electrons
• Dark Current 0.1 e-/sec/pixel
• Quantum Efficiency > 60%
4” silicon wafer with B-band filter