Scientific Team

Dr. John Barnard, Senior Technical Specialist ( has 30 years of experience in the health, safety, radiation processing and environment fields with Cancer Care Manitoba, Atomic Energy of Canada Limited (AECL) and Acsion. His principal areas of expertise are Operational Radiation Safety, Health Physics and Nuclear Physics. He has authored more than 50 publications or reports on radiation processing and health physics topics. He has managed industrial accelerator facilities and acted as a regulatory/licensing specialist for the Canadian Government (AECL) and in the uranium mining industry. He has developed training materials and taught radiation protection at Department of National Defence, Saskatchewan Environment and AECL.

Dr. Jeff Martin, Physics Professor, University of Winnipeg ( received his B.Sc. degree in Honours Physics from the University of Manitoba (U of M) in 1995 and a Ph.D. in experimental nuclear physics from the Massachusetts Institute of Technology in 2000. He was a postdoctoral fellow at the California Institute of Technology from 1999-2004 before joining the University of Winnipeg as an Assistant Professor in 2004. His area of specialization is experimental particle physics, and he has worked on such diverse projects as the production of ultracold neutrons at Los Alamos, NM and determining fundamental properties of the proton at Jefferson Lab in Newport News, VA. As well as holding a Natural Sciences Engineering and Research Council Discovery Grant, he received Canada Foundation for Innovation funding for establishment of a detector lab based at the University. He will also be leading the design, construction, and operation of an ultracold neutron source at TRIUMF at the University of British Columbia, in collaboration with the Japan Society for the Promotion of Science.

Dr. Sandor Demeter, WRHA Clinical Director of the Diagnostic Imaging Program, University of Manitoba Chair of Radiology ( received his BSc (1986) and MD (1989) from the University of Saskatchewan. Thereafter he obtained his Canadian Royal College Fellowship (FRCPC) with certification in Community Medicine (1994), and a Masters of Health Sciences in Community Health and Epidemiology (1993), both from the University of Toronto. He worked in Public Health in Ottawa (Field Epidemiologist), Southern Ontario (Medical Officer of Health and Commissioner of Public Health) and Edmonton (Deputy Medical Officer of Health) before training in Nuclear Medicine. He obtained his Canadian Royal College certification in Nuclear Medicine (2002), as well as a Masters of Science Degree (2004), both from the University of Alberta. Dr. Demeter moved to Winnipeg in 2002 to become a staff Nuclear Medicine Physician at HSC. He became the HSC Nuclear Medicine Section Head in 2004 as well as the Co-Director of the Winnipeg Positron Emission Tomography /CT program. He was also the WRHA Clinical Director of the Diagnostic Imaging Program as well as the University of Manitoba Chair of Radiology (2009-12). He is an Associate Professor with the U of M Faculty of Medicine with joint appointments in Radiology and Community Health Sciences. His main areas of research are health technology assessment, health economics, and health policy, with an emphasis on diagnostic imaging.

Jeff Dovyak, Radiation Safety Coordinator, Winnipeg Regional Health Authority ( graduated as a Nuclear Medicine Technologist in 1985. He worked at the WRHA in nuclear for 18 years. He transferred to the WRHA Radionuclide Safety Program in 2003 and was appointed WRHA Radiation Safety Coordinator in 2005. He is also an active member of the Canadian Radiation Protection Association, with other associations.

David Brown, President, Mevex Corporation, Ottawa, ON ( graduated from Queen’s University’s Engineering Physics program in 1988. David joined Mevex in 1988 and participated in commissioning the Mevex Applications Development Centre (ADC). The ADC worked with potential accelerator users to develop novel processes on a pilot scale. Projects included space radiation simulation studies with DND-CRC, nuclear blast simulations for DND-DREO, breaking chemical bonds for peat and cellulose, and microbial reduction applications. David was charged with growing the medical therapy service business and with designing, selling, and building the first Mevex industrial accelerator. David is a key player in Mevex’s operations, marketing, technical support, and R&D programs.

Peter Brown – Mevex Corporation ( graduated from Queen’s University’s Engineering Physics program in 1965. Peter joined AECL, Chalk River Branch in 1966 where he worked on the NRU reactor and the TANDEM accelerator. In 1973, he moved to AECL’s Commercial Products division where he developed the Therac line of cancer therapy accelerators. Peter was involved in the development, production, sales, and marketing of these machines. In 1985, Peter received the “Discovery Award” for his development of a prototype industrial accelerator. Peter was the Commercial Manager of AECL Accelerators from 1985 – 1986. In 1986, Peter left AECL to start Mevex Corporation.

Dr. Paul Carlson – Senior Scientist – Nuclear and Radiation Physics ( has over 25 years experience in nuclear physics research, analyses and code development, with companies such as Acsion and AECL. His career has included core physics analysis, training of Korean and Mexican physicists in the use of physics analysis methods and codes, designing, testing and integrating new code that predicts radionuclide transport, and extensive experience with MCNP code, including developing its standard operating procedure. Dr. Carlson is a key technical resource for this project because of his experience with criticality analyses.

Dr. Mark de Jong – Canadian Light Source Incorporated ( Dr. de Jong graduated from the University of Manitoba with a B.Sc. in Physics (Hon.) in 1974 and a Ph.D. in Accelerator Physics in 1981. From 1981 to 1999, Dr. de Jong was a staff scientist at the AECL Chalk River Laboratories in Ontario. As Acting Branch Manager of the Instrumentation and Control Branch from January 1997 to April 1998 and of the Control and Operations Technology Branch from April to August 1999, he managed the development programs in control and safety computer systems and instrumentation for existing and future CANDU nuclear power stations.

Dr. de Jong was a project leader at the Canadian Light Source Inc. from 1999 to 2003, where he managed the technical development and construction of a 2.9 GeV electron synchrotron, storage ring and synchrotron light beam lines. Dr. de Jong is currently the Director of Operations at the Canadian Light Source Inc. He manages the operations of the 2.9 GeV electron storage ring, which includes oversight of the departments of Accelerator Operations and Development, Engineering and Technical Services, Controls and Instrumentation Development, and Information and Communication Technology. He also operates the linear accelerator designed to produce selected radioisotopes.