A5020731419- Calibration and Measurement Techniques
- Atmospheric Ozone and Climate
- Adaptive optics and wavefront sensing
- Spacecraft and Cryogenic Technologies
- Integrated Circuits and Semiconductor Failure Analysis
- Ion-surface interactions and analysis
- Italian Fascism and Post-war Society
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Sensor Technology and Measurement Systems
- Advanced Surface Polishing Techniques
- Mental Health Research Topics
- Political Theory and Influence
- Advanced Sensor Technologies Research
- Ionosphere and magnetosphere dynamics
- Metal and Thin Film Mechanics
- Law in Society and Culture
- Radio Astronomy Observations and Technology
- Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
- Meteorological Phenomena and Simulations
- Advanced Fiber Optic Sensors
- Spectroscopy and Laser Applications
- Astronomy and Astrophysical Research
- Health and Conflict Studies
- Spacecraft Design and Technology
University of Oxford
2003-2023
Columbia College Chicago
2006-2023
Columbia College
2013
Research Complex at Harwell
1981-2007
United Kingdom Atomic Energy Authority
2007
Science Oxford
1983
University of Calgary
1970-1971
The High Resolution Dynamics Limb Sounder (HIRDLS) experiment was designed to provide global temperature and composition data on the region from upper troposphere mesopause with vertical horizontal resolution not previously available. science objectives are study of small‐scale dynamics transports, including stratosphere‐troposphere exchange, troposphere/lower stratosphere chemistry, aerosol, cirrus PSC distributions, gravity waves. instrument features 21 channels, low noise levels, high...
The Square Kilometre Array (SKA) project is an international effort to build the world s largest radio telescope, enabling science with unprecedented detail and survey speed. spans over a decade now at mature stage, ready enter construction integration phase. In fully deployed state, MID-Telescope consists of 150-km diameter array offset Gregorian antennas installed in quiet zone Karoo desert (South Africa). Each antenna equipped three feed packages, that are precision positioned...
The visible infrared thermal imaging spectrometer (VIRTIS) is one of the principal payloads to be launched in 2003 on ESA's Rosetta spacecraft. Its primary scientific objective s are map surface comet Wirtanen, monitor its temperature, and identify solids gaseous species nucleus coma. VIRTIS will also collet data two asteroids, which has been identified as Mimistrobell. collected remotely using a mapping co-boresighted with high spectral resolution spectrometer. mapper consists Shafer...
KMOS is a second generation instrument in construction for use at the European Southern Observatory (ESO) Very Large Telescope (VLT). It operates near-infrared (0.8 to 2.5 microns) and employs 24 deployable, image slicing integral field units (IFUs) feeding three spectrographs. The spectrographs are designed built by partnership of University Oxford Rutherford Appleton Laboratories (RAL). We describe assembly, integration alignment procedures involved these detail. also present results...
Abstract The correspondence between observed and expected impurity distributions occurring in high dose, temperature ion implantation, has been investigated for 60 keV Cu+ ions poly-crystalline Ti. atomic profiles are caclulated assuming a simple sputtering model of retention, the actual were determined by backscattering analysis. Implantation carried out at elevated temperatures (∼500–600°C) to doses (≳ 5.0 1016 ions/cm2) resulted marked redistribution stopped material, with Cu accumulating...
In this article, we present a novel dielectrically loaded quad-ridge flared horn (QRFH) as reflector feed with beyond-decade ultrawideband performance. The dielectric is machined in low-loss, space-grade polyimide specified low outgassing for vacuum environment. covers 1–20 GHz bandwidth measured band-average input reflection of −13.6 and 41.5 dB isolation between two orthogonal polarized ports. Predicted performance paraboloidal 60° half-subtended angle 62% aperture efficiency average over...
Transition metal-doped II-VI (TM:II-VI) chalcogenides are well-known laser materials for optically pumped middle-infrared lasers. Cr:ZnSe is a key representative of this class transition metal doped gain media and arguably considered the material choice In addition to effective mid-IR lasing under optical excitation, these crystals, being wide-band semiconductors, hold potential direct electrical excitation. One way form n-type conductivity in ZnSe crystals by annealing them melt Zn-Al...
The High Resolution Dynamics Limb Sounder (HIRDLS) instrument is scheduled for launch on the NASA AURA satellite in January 2004; it a joint project between UK and USA. HIRDLS mid-infrared limb emission sounder which will measure concentration of trace species aerosol, temperature pressure variations Earth's atmosphere about 8 100 km altitude finer spatial scale than has been achieved before. This depend upon both high quality build, very precise pre-launch calibration. Proto Flight Model...
We report on bond pad damage for a smart power device using 50.8 μm (2 mil) diameter Pd-coated Cu wire. show that the can be relatively subtle; wire bonds damaged structures have high pull and shear strength, but cracks in underlying regions lead to metal extrusions cause electrical shorts.
A specially designed and built monochromator was developed for the spectral calibration of HIRDLS instrument. The High Resolution Dynamics Limb Sounder (HIRDLS) is a precision infra-red remote sensing instrument with very tight requirements on knowledge response to received radiation. high performance, vacuum compatible monochromator, wavelength range from 4 20 microns encompass that integrated into collimating system which shared set tiny broad band sources used independent spatial...
The pre-launch calibration of the HIRDLS instrument took place in a dedicated facility at University Oxford. One aspect this was determination response to black body radiation. This achieved with use purpose built full aperture targets which were mounted vacuum chamber together all equipment. Special attention placed on absolute knowledge emission from these targets. done through combination thermometric sensor traceable International Temperature Standard (ITS-90), surface measurements,...