We use a general theory of the fluctuating electromagnetic field to calculate the friction force acting on a small neutral particle, e.g., a physisorbed molecule, or a nanoscale object with arbitrary dispersive and absorptive di-electric properties, moving near a metal surface. We consider the dependence of the electromagnetic friction on the temperature T , the separation d, and discuss the ro...

This paper presents a 3D model for the determination of the temperature field in an electromagnetic launcher. The large amounts of energy that are dissipated into the structure of an electromagnetic launcher during short periods of time lead to a complicated thermal management situation. Effective thermal management strategies are necessary in order to maintain temperatures under acceptable lim...

∗ Work supported by the U.S. Department of Energy ASCR, BES and HEP Divisions under contract No. DE-AC02-76SF00515. Abstract The successful operation of accelerator cavities has to satisfy both rf and mechanical requirements. It is highly desirable that electromagnetic, thermal and structural effects such as cavity wall heating and Lorentz force detuning in superconducting rf cavities can be ad...

Microwave heating is an essential technique for cooking a wide variety of foodstuffs in both domestic and commercial applications. However, the simulation of this process remains problematic because of the complexity of both calculating a varying electromagnetic field and also determining how this interacts with the foodstuff (which is typically a complex multi-phase material). In one-dimension...

Electromagnetics is a fundamental part of biomedical engineering and modern healthcare due to the electromagnetic nature of several important processes in the human body and the interactions of electromagnetic fields with the human body. As a consequence, electromagnetics is exploited for diagnostic and therapeutic purposes by a multitude of medical devices. The biomedical engineering society s...

Assimilating radio-frequency waves with rays, this thesis examines the transport of electromagnetic power in a cold plasma, for heating and current-drive applications in tokamaks. Conservation laws are used to compute both the wave amplitude and phase in the Eikonal approximation and extend the RAYcON code to account for phenomena such as focusing until linear conversion is encountered. Simulat...

BACKGROUND The magnetic resonance imaging (MRI) radio frequency (RF) field induced heating on external fixation devices can be very high in the vicinity of device screws. Such induced RF heating is related to device constructs, device placements, as well as the device insertion depth into human subjects. In this study, computational modeling is performed to determine factors associated with suc...