J.L. (Iain) Campbell iain.jpg Physics of atomic inner-shell processes X-ray detector properties - response function, efficiency, etc. Development and application of PIXE and micro-PIXE Re-calibration of the Mars Exploration Rovers APXS using certified geostandards Physics basis of calibration of the Mars Science Laboratory APXS Director of accelerator operations Water content of Martian soils from APXS spectra John Maxwell john.jpg Software consultant to the PIXE group GUPIX and GUPIXWIN GPPV - the versatile Guelph program for general spectrum fitting Data recording systems for PIXE and micro-PIXE Bill Teesdale bill.jpg Microprobe manager with supervisory responsibility for accelerator operation and maintenance Deputy Director of accelerator operations Nick Boyd nick.jpg Primary developer of Gupixwin since v1.2 (Part-Time) Willy Brown-Bury willy.jpg Refinement of the Monte Carlo photon scatter code which is used as a quantitative diagnostic for water in Martian soils and rocks Extension to layered samples Refinement of the spectrum fitting code through a physics-based treatment of the Compton scatter feature Glynis Perrett glynis.jpg Calibration of the Mars Science Laboratory APXS using the GUAPX-Win code Re-calibration of the scatter ratio method for determination of mineralogically bound water in the Martian regolith Extension of the method using synthetic water-bearing sulfates, in collaboration with MSL APXS team members at Universities of New Mexico and Western Ontario Chris Heirwegh chris_h.jpg Fundamental physics underlying X-ray spectrometry fluorescence yields Stefan Andrushenko stefan.jpg Developer of GUAPX-Win APXS experimental set-up development, and simulation programming Project technical support, including website design and maintenance May Lee may.jpg Working on simplification of the Monte Carlo photon scatter code which is used as a quantitative diagnostic for water in Martian soils and rocks Simulation of Rayleigh/Compton ratios in APXS spectra recorded on Mars Stephanne Taylor (now pursuing a PhD in Ocean and Atmospheric Science at McGill University) steph.jpg Calibration of the APXS for analysis of Martian rocks and soils Natasha Holmes (now pursuing a MSc at UBC) natasha.jpg Underlying physics of the APXS Theo Hopman (now a High School Physics Teacher in Fergus, Ontario) theo.jpg Monte Carlo modeling of X-ray detector response function Dedicated monochromator for detector response studies Diagnosis of geometric properties of X-ray detectors Brian Jones (now pursuing a PhD at the University of Surrey) brian.jpg Studies of the Cambridge Scientific Digital processor L subshell ionization, fluorescence and Coster-Kronig yields APXS development and data analysis Patrick Bonnick patrick.jpg Extension of the GUPIX database Christiane Mallett (now doing MSc at University of Western Ontario) christiane.jpg Monte Carlo simulation of the scatter components in spectra from the APXS on the Mars Exploration Rovers, with the objective of discerning bound water in Martian rocks and soils through the elastic/inelastic scatter ratio of the plutonium L-alpha line. Melissa Omand (now doing PhD at Scripps Institute of Oceanography) melissa.jpg Mars Exploration Rover: Monte Carlo simulation of X-ray yield vs. concentration relationships Alanna Weatherstone: (now working in information technology in London, England) alanna.jpg Development of GUPIXWIN V1.1: C++ coding; screen design; data input Mike Vormwald (now working in information technology in New York State) mike.jpg Development of GUPIXWIN V1.1: graphics; output; batch mode Dr Zdenek Nejedly (now a systems analyst with Computing and Communication Services , U of G) zdenek.jpg Automated aerosol analysis by PIXE, LIPM and forward scatter Software for PIXE data accumulation and batch analysis Software for accelerator and radiation monitoring Provision of micro-PIXE and PIXE analyses to collaborators of the GPG