Challenges Atomiclevel control of backilluminated detector surfaces and detectorAR coating interfaces to produce highefficiency detectors with stable response and unique performance ID: 283961
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Objectives and Key
Challenges:
Atomic-level control of back-illuminated detector surfaces and detector/AR coating interfaces to produce high-efficiency detectors with stable response and unique performance advantages in the challenging UV and FUV spectral range
Significance of Work:Affordable, high-efficiency, high-stability imaging arrays are an efficient and cost-effective way to populate UV/Optical focal planes for spectroscopic missions and 4m+ UV/O telescope recommended by the 2010 Decadal Survey
Approach:Develop and produce 2-megapixel, AR-coated, delta-doped, electron-multiplying CCDs (EMCCDs) using JPL’s 8-inch capacity silicon molecular beam epitaxy (MBE) for delta doping and atomic layer deposition (ALD) for AR coatingPerform relevant environment testing and system-level on-sky evaluation (broadband p-cha arrays) to validate performance over a wide range of signal levels
Key Collaborators:Chris Martin (Caltech) David Schiminovich (Columbia University)Paul Scowen (Arizona State University)Michael Hoenk (JPL)
Current Funded Period of Performance: Jan 2013 – Dec 2015
Recent Accomplishments:Produced and tested multiple UV, photon-counting, 2-megapixel arraysDeveloped narrowband AR coatings for FIREBall and demonstrated on 2-megapixel arraysMeasured ~80% QE at FIREBall peak with very low dark current Produced large-format arrays for broadband detection for on-sky observation; demonstrated good performance at Mount Bigelow
Applications:Large aperture UV/Optical telescope, Explorers, spectroscopy missions, UV/Optical imaging
Next Milestones:Characterize FIREBall-AR coated 2-megapixel arrays for noise especially dark current with low noise system (FY15Q4)Select FIREBall detector from pool of processed devices and deliver to Caltech and the spectrograph teamFurther evaluate performance in astrophysics- and mission-relevant environments (FY16Q1, FY16Q3), Mount Bigelow 61” (Nov 2015) and FIREBall (FY16Q3)
TRL In = 4 TRL Current = 4 TRL Target= 5-6
High-Efficiency Detectors in Photon-Counting and Large Focal-Plane Arrays for Astrophysics Missions
PI: Shouleh Nikzad / JPL
JPL facility and 2-megapixel device before and after packaging