Plasma Physics and Fusion Research on the Madison Symmetric Torus

Plasma is the fourth state of matter.  It is similar to a gas but is composed of electrically charged particles (electrons and ions) instead of neutral atoms or molecules.  Plasma is not nearly as common as solids, liquids, and gases are on earth.  However, it is the most common state of matter in the visible universe so understanding it is important for astrophysics.  It is also important because hot, dense plasma produces energy through fusion.  It is hoped that this energy could be harnessed in fusion reactors to provide a clean, abundant source of energy.

I will address three main points in this talk.  First, I will give an introduction to the physics of plasmas and of fusion.  Second, I will give an overview of the Madison Symmetric Torus; a plasma physics experiment at the University of Wisconsin on which both plasma physics and fusion topics are studied.  Finally, I will talk about my experiment on the Madison Symmetric Torus - Oscillating Field Current Drive.  Oscillating Field Current Drive is one proposed method of sustaining a plasma in future fusion reactors using oscillating magnetic fields and provides a unique backdrop for exploring some topics in plasma physics.

Background in electricity and magnetism will be helpful for understanding this talk.  However, I will briefly introduce the relevant electricity and magnetism concepts so that it will be accessible to those who have not yet taken an E & M course.