Advanced sensor development at JPL
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sensors in-situ deep space missions detection of l↗
Engineering topics
Krabach, T.
Publications and source records attributed to Krabach, T..
Advanced sensor development at JPL
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life detection↗
Convergence of nano-, bio-, and info- technologies: a NASA perspective
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bio-technology information technology nano technol↗
Breakthrough Sensor Technology for Space Exploration in the 21st Century
The Breakthrough Sensors and Instrument Component Technology (BSICT) thrust area fosters the develop of breakthrough technology in the areas of detectors, sensors, lasers, coolers and electronics to enable a new set of exciting NASA missions in the new millennium.
BSICT NASA UV QWIP RADAR IR↗
Space Sensors form Human Investigation of Planetary Surfaces (SpaceSHIPS)
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sensors micro techonolgy HEDS↗
Recent Progress in Quantum Well Infrared Photodetector Research and Development at Jet Propulsion Laboratory
One of the simplest device realizations of the classic particle-in-the-box problem of basic quantum mechanics is the Quantum Well Infrared Photodetector (QWIP). In this paper we discuss the optimization of the detector design, material growth and processing that has culminated in realization of 15 micron cutoff 128x128 QWIP focal plane array camera, hand-held and palmsize 256x256 long-wavelength QWIP cameras and 648x480 long-wavelength cameras, holding forth great promise for myriad applications in 6-25 micron wavelength range in science, medicine, defense and industry.
quantum↗
NbN A/D Conversion of IR Focal Plane Sensor Signal at 10 K
We are implementing a 12 bit SFQ counting ADC with parallel-to-serial readout using our established 10 K NbN capability. This circuit provides a key element of the analog signal processor (ASP) used in large infrared focal plane arrays. The circuit processes the signal data stream from a Si:As BIB detector array. A 10 mega samples per second (MSPS) pixel data stream flows from the chip at a 120 megabit bit rate in a format that is compatible with other superconductive time dependent processor (TDP) circuits being developed. We will discuss our planned ASP demonstration, the circuit design, and test results.
conversion↗
Temperature-Dependent Compensation and Optical Quenching by Thermal Oxygen Donors in Germanium
Photothermal ionization spectroscopy of germanium, doped in the impurity-band conduction range with gallium acceptors and with thermal oxygen donors, reveals that the donors and acceptors compensate each other at temperatures higher than about 5K, but that the impurities coexist as neutral donors and acceptors at lower temperatures.
optical quenching↗
Imaging Spectrometry-Concepts and System Tradeoffs
The concept of imaging spectrometry is finding broad application in scientific instrumentation for earth-based, airborne, and space applications. An imaging spectrometer is characterized by the combination of imaging with complete sampling in the spectral domain. In so doing, material identification can be accomplished and displayed in conjunction with the conventional recognizable image. An image spectrometer incorporates a wide variety of techniques, including focal plane arrays, imaging and spectrometer optics, and spectral dispersing devices. The design of a successful system involves a complex set of tradeoffs incorporating the properties and limitations of the various technologies. For applications in the infrared, additional technologies such as focal plane cooling are required, and the other technologies present more limitations and constraints.
Herring, M.↗