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The Labs That Go Boom: The Plasma Physics Laboratory Makes Miniature Suns
Cranking out plasma at 100 million degrees

By Brooke Borel

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A Crash Course in Plasma Physics

Lab: Plasma Physics Laboratory at Princeton University
Career: Plasma physicist, fusion scientist, mechanical engineer

Each summer, 45 undergraduate physics and engineering students from schools across the country converge at Princeton for a crash course in plasma physics. A state of matter found in stars and frequently in interstellar space, a plasma is an electrically charged soup of ions and free electrons made by superheating atoms until they rip themselves apart. Over the summer, students get to use the lab’s collection of plasma-creating machines, some of the best in the U.S., to study plasmas firsthand. For example, students ionize lithium atoms with radio*waves to see how plasmas are created. They also study how magnetic fields, such as those found in the sun, interact to create solar storms. And after an upgrade, students will work on the National Spherical Torus Experiment (NSTX), a device that physicists will use to study fusion. The NSTX will heat plasma to 100 million degrees until the atoms fuse together and release energy. This is the same process that fuels the sun, and it could one day be a source of clean energy.