A5075894523- Particle accelerators and beam dynamics
- Nuclear reactor physics and engineering
- Gyrotron and Vacuum Electronics Research
- Nuclear Materials and Properties
- Microwave and Dielectric Measurement Techniques
- Particle Accelerators and Free-Electron Lasers
- Nuclear and radioactivity studies
- Microwave Engineering and Waveguides
- Advanced X-ray Imaging Techniques
- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Electromagnetic Compatibility and Measurements
- X-ray Spectroscopy and Fluorescence Analysis
- Electromagnetic Simulation and Numerical Methods
- Nuclear Physics and Applications
- Underground infrastructure and sustainability
- Electromagnetic Scattering and Analysis
- Force Microscopy Techniques and Applications
- Medical Imaging Techniques and Applications
- Microwave Dielectric Ceramics Synthesis
- Innovation Diffusion and Forecasting
- Soil Moisture and Remote Sensing
- Nuclear Engineering Thermal-Hydraulics
- Urban Stormwater Management Solutions
- Engineering and Material Science Research
Canadian Nuclear Laboratories
2018-2022
Atomic Energy (Canada)
1991-2014
University of British Columbia
1987
University of British Columbia Hospital
1986
Stony Brook University
1986
Brantford Energy (Canada)
1933-1936
A System has been developed, based on the cavity frequency ft technique, for doing rapid measurements of scalar 'nativity and permeability samples. The basic shift equation is reviewed, practical, formulae which are used determining values £ in Q shift, developed.
A system has been developed, based on the cavity frequency shift technique, for doing rapid scoping measurements of complex permittivity and scalar permeability from 50 to 2450 MHz andfrom-160°C +1400°C. The measurement system, including multimode rf cavities, is described, some a selection materials are presented demonstrate use system.
Convenient analytic expressions for electromagnetic fields inside dielectric objects perturbing a cavity exist only ellipsoids of rotation. A newly developed code, SEAFISH, was used to calculate sample shape correction factors perturbation analysis using cylindrical samples with different aspect ratios and complex constants.
A toroidal relay optic has been used to overcome the problem of damage caused by debris that limited previous attempts at soft x-ray lithography and contact microscopy using laser-produced plasma sources. Not only is specimen preserved, but it now possible have a vacuum retaining transparent Si(3)N(4) window as permanent part apparatus, greatly simplifying handling. The exposure times are ~2 ns.
The concept of "disruptive innovation" offers a basis for understanding the structure and dynamics technology-driven markets, how they respond to emerging technologies. may also prove useful in assessing relative prospects research development related fields, such as nuclear, renewable or other energy A trial assessment was performed on potential innovations disrupt markets. Consumer-level photovoltaic power areas with high insolation found be most potentially disruptive innovation...
Abstract To enable the deployment of small modular reactors (SMRs) in Canada, Canadian Nuclear Laboratories (CNL) is interested applicability zero energy deuterium-2 (ZED-2) experiments for validation Monte Carlo reactor physics codes and models SMR fuels. This investigated here by considering potential ZED-2 testing fuel assemblies (FAs) two different technologies: pressurized-water (PWR), fluoride-salt-cooled high-temperature (FHR). Each proposed set mixed-lattice substitution uses driver...
Recent cross-section measurements on gadolinium have raised concerns over the accuracy of moderator poison reactivity coefficient calculations. Measurements been made at ZED-2 (Zero Energy Deuterium) critical facility, Chalk River Laboratories, AECL, to study effect in moderator. Since neutron capture boron is well known, were also with provide calibration data for gadolinium. The used quantify bias full-core simulations using MCNP, a transport code extensively nuclear systems, along...
We describe an x-ray diode which is simple to construct and operate. At a bias voltage of 2000 V, the response time 430 ps (FWHM). The detector was used obtain temporally resolved measurements on laser-produced plasmas.
A 2-dimensional solver for the complex scalar Helmholtz equation has been developed. This code can be used to solve RF field distribution in microwave applicators that have large dielectric or permeability losses and determine VSWR on feed line applicator. It also solves eigenvalue problem cavities containing lossy materials. Some examples °fits use both types ofapplication are given.
The design of a normal-conducting high-power test cavity (HPTC) for PEP-II is described. includes HOM loading waveguides and provisions testing two alternate input coupling schemes. 3-D electromagnetic field simulations provided information the surface power deposition. Finite element codes were utilized thermal stress analyses to arrive at suitable mechanical capable handling high dissipation. approach with emphasis on cooling channel layout reduction described.< <ETX...
Simultaneous measurements of x-ray intensity and shock breakout at the target rear side showed a significant increase in postshock transmission through target. This was attributed to decompression by unloading wave. The results corroborated previously observed delayed radiation heating surface. They also indicated that time-integrated on could be affected decompression.
A single-cell 2856 MHz RF cavity for the MIT-Bates Linear Accelerator Laboratory South Hall Ring (SHR) has been designed and built at AECL's Chalk River Laboratories. The SHR is an electron beam storage ring to operate with all (1812) buckets filled a circulating current of 80 mA. cavity, CW operation 10 kW wall dissipation, 40 mm diameter aperture, on-axis higher-order mode damping iris-coupled input. This paper describes mechanical design, system fabrication results measurements on...
A 3-dimensional boundary-integral method has been developed for RF cavity mode analysis. frequency-dependent, homogeneous linear matrix equation is generated from a variant of the magnetic field integral (MFIE) where domain integration closed surface specifying envelope cavity. Frequencies at which MFIE nonzero solutions are frequencies cavity, and corresponding distributions. The can then be used to calculate electric any other point inside Forward iteration find largest complex eigenvalue...
Elliptical beam shapes have been seen at the exit of a number on-axis coupled electron linacs. These noncircular attributed to quadrupole effects produced by coupling slots in cell walls. Qualitative and detailed cavity calculations predict that cancel if are aligned across accelerating cavities, as opposed rotated through 90 degrees has normally case. Two short S-band linacs, identical except for orientation slots, built test predictions. The results measurements profiles two linacs...
Modern accelerator design practice includes the use of alumina RF and microwave windows high-quality ferrites in applications with ever-increasing requirements on power handling ability. Modeling studies such designs are increasing economic importance, but frequently hindered by a lack measured values ceramic loss factors. AECL has developed system to measure complex permittivity small samples over frequency range from 50 2450 MHz up 1000 degrees C temperature. Samples window materials...
A tuning plunger and an adjustable RF coupler have been designed at AECL's Chalk River Laboratories for a CW 2856 MHz cavity the MIT-Bates South Hall Ring. The tuner provides frequency range of 1.1 with resolution less than 0.5 kHz. high-power drive uses iris coupling set factor (/spl beta/) adjustment posts to provide fixed /spl beta/-values from 1 10. This paper describes design, mechanical design performance these units.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...