R Fedosejevs

Area of Study / Keywords

Photonics and Plasmas

Research

Research Interests

Research Interests include high power and ultrashort laser development and laser-plasma interactions and applications in sensing, materials processing and laser fusion energy. These studies span more than 40 years. As a visiting scientist I spent five years total at the National Research Council of Canada, three years at the Max-Planck-Institut fuer Quantenoptik in Germany, one year at the CELIA laser institute in Bordeaux and half a year at the Center for High Power Lasers, CLPU, in Salamanca, Spain. During those periods I worked with a large variety of laser systems including high power nanosecond carbon-dioxide, iodine and glass lasers, picosecond glass and krypton fluoride lasers, and femtosecond titanium sapphire laser systems. With these systems I’ve studied a number of high temperature plasma phenomena including x-ray generation, MeV to GeV particle acceleration and hydrodynamics of laser produced plasmas. Many of the studies are related to the ultimate goal of generating fusion energy using high power laser pulses.

Current Research:

• Relativistic Laser Plasma Interactions and Fast Ignition for Laser Fusion Energy
• Shock Ignition for Laser Fusion Energy
• The development of high power femtosecond laser systems
• MeV to GeV particle acceleration with ultrashort laser pulses
• The study of laser-plasma interactions on a femtosecond and picosecond time scale including high intensity particle and x-ray generation and applications to laser fusion
• Laser sensor technology for identification and characterization of materials 
• Precision micromachining and nanomachining using femtosecond laser pulses  
• Development of high energy proton telescope for use on proposed satellite mission 

ECE 202 - Electrical Circuits I

Circuit element definitions. Circuit laws: Ohm's, KVL, KCL. Resistive voltage and current dividers. Basic loop and nodal analysis. Dependent sources. Circuit theorems: linearity, superposition, maximum power transfer, Thevenin, Norton. Time domain behavior of inductance and capacitance, energy storage. Sinusoidal signals, complex numbers, phasor and impedance concepts. Magnetically coupled networks. Single phase power and power factor. Prerequisites: MATH 101, 102. Credit may be obtained in only one of ECE 202, E E 240, ECE 209 or E E 239, unless approved by the Department.

ECE 474 - Introduction to Plasma Engineering

Definition of plasma. Behavior in electric and magnetic fields. Particle, kinetic and fluid description of flow and transport phenomena. Waves in plasmas. Current approaches to thermonuclear fusion. High temperature laser produced plasmas and low temperature DC and RF discharge plasmas. Applications in discharge pumping of lasers, plasma etching, thin film deposition and generation of x-rays. Prerequisites: ECE 370 or E E 315 or PHYS 381. Credit may be obtained in only one of ECE 474 or E E 474.

ECE 675 - Plasma Engineering

Engineering of plasmas for applications in fusion, space, astrophysics, microelectronic processing, plasma-assisted manufacturing and microwave generation. Characterization of the plasma state, charged particle dynamics in electric and magnetic fields, the two-fluid model, magnetohydrodynamic model, linear and nonlinear waves, atomic and collisional processes, transport properties.

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