Articles techniques et présentations

Abstract: Line resolution, uniformity and focusing are the three (3) most important factors in the use of electron-beam lithography to form either high resolution masks or direct-write device etch patterns. This paper will present the observations and analyses made from a group of COMSOL ... En savoir plus

Research <em>in vitro</em> and in small animals has shown electric fields (EFs) induce directional migration in stem cells along an electrical potential gradient, a process known as cell electrotaxis, or cell galvanotaxis1,2. We built a first-pass COMSOL model to identify ... En savoir plus

Sulfidation corrosion of Nickel based super-alloy turbine blades is one form of corrosion that adversely affects blade performance. It results in a depletion zone involving magnetic corrosive byproducts with a high relative permeability [1]. Magnetometers are sometimes used in non ... En savoir plus

When a material is subjected to a sudden change in electric field, the polarization of the material takes a finite time to respond – this phenomenon is referred to as dielectric relaxation. Dielectric relaxation is critical to understanding the important analytic technique of impedance ... En savoir plus

MEMS microphones consist of a conductive backplate and a conductive flexible membrane. The backplate and the membrane are at a certain distance from each other to be interpreted as parallel plates of a capacitor. When a bias voltage is applied to the electrodes, membrane deflection ... En savoir plus

For many decades Helium-3 (3He) and Argon gas filled detectors have been used for neutron and gamma detection. Detection requires the generation of electrons which can then be measured by electronic means. These electrons are generated either directly through gamma ionization of a gas ... En savoir plus

Organic Thin Film Transistors are simulated for gas sensing application. The simulation is performed using COMSOL Multiphysics® simulation software's Semiconductor Module. Drift-diffusion (DD) simulation model is used in which the basic equations used are similar to those used for a ... En savoir plus

Micro shutter array (MSA) is a programmable optical spatial filtering device fabricated by micro electro-mechanical system (MEMS) technology. It was originally developed for James Webb Space Telescope (JWST) to enable multi-object spectroscopy and operated by a moving magnet. Next ... En savoir plus

HVDC electrodes are installed on HVDC transmission systems to provide a low resistance current return path during both monopolar and bipolar operation, using the earth and/or sea as the conductive medium. HVDC electrodes are in general less costly and have lower losses than dedicated ... En savoir plus

Disciplines such as neutron polarimetry and medical imaging depend on highly uniform magnetic fields to preserve target polarization, and have turned to "magic boxes" to reliably generate these fields. Searches for the permanent Electric Dipole Moment of the neutron (nEDM) are sensitive ... En savoir plus