A Collaborative National Center for Fusion & Plasma Research

Plasma physics

Subscribe to RSS - Plasma physics

The study of plasma, a partially-ionized gas that is electrically conductive and able to be confined within a magnetic field, and how it releases energy.

Stewart Prager

Stewart Prager was the sixth director of PPPL. He joined the Laboratory in 2009 after a long career at the University of Wisconsin in Madison. At Wisconsin, he led research on the “Madison Symmetric Torus” (MST) experiment and headed a center that studied plasmas in both the laboratory and the cosmos. He also co-discovered the “bootstrap current” there—a key finding that has influenced the design of today’s tokamaks. He earned his PhD in plasma physics from Columbia University.

Bank on it: Gains in one type of force produced by fusion disruptions are offset by losses in another

Doughnut-shaped tokamaks — facilities designed to reproduce the fusion energy that powers the sun and stars on Earth — must withstand forces that can be stronger than hurricanes created by disruptions in the plasma that fuels fusion reactions. Recent findings by physicists at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) show that certain forces released by disruptions act in a surprising manner.

Bank on it: Gains in one type of force produced by fusion disruptions are offset by losses in another

Doughnut-shaped tokamaks — facilities designed to reproduce the fusion energy that powers the sun and stars on Earth — must withstand forces that can be stronger than hurricanes created by disruptions in the plasma that fuels fusion reactions. Recent findings by physicists at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) show that certain forces released by disruptions act in a surprising manner.

Blowing bubbles: PPPL scientist confirms novel way to launch and drive current in fusion plasmas

An obstacle to generating fusion reactions inside facilities called tokamaks is that producing the current in plasma that helps create confining magnetic fields happens in pulses. Such pulses, generated by an electromagnet that runs down the center of the tokamak, would make the steady-state creation of fusion energy difficult to achieve. To address the problem, physicists have developed a technique known as transient coaxial helicity injection (CHI) to create a current that is not pulsed.

Blowing bubbles: PPPL scientist confirms novel way to launch and drive current in fusion plasmas

An obstacle to generating fusion reactions inside facilities called tokamaks is that producing the current in plasma that helps create confining magnetic fields happens in pulses. Such pulses, generated by an electromagnet that runs down the center of the tokamak, would make the steady-state creation of fusion energy difficult to achieve. To address the problem, physicists have developed a technique known as transient coaxial helicity injection (CHI) to create a current that is not pulsed.

PPPL findings: From new fusion developments to surprises in astrophysics at global plasma physics gathering

More than 155 researchers and students — the largest delegation from the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) in recent years — attended the 61st annual meeting of the American Physical Society Division of Plasma Physics (APS-DPP) in Fort Lauderdale, Florida.

Pages

U.S. Department of Energy
Princeton Plasma Physics Laboratory is a U.S. Department of Energy national laboratory managed by Princeton University.

Website suggestions and feedback

Pinterest · Instagram · LinkedIn · Tumblr.

PPPL is ISO-14001 certified

Princeton University Institutional Compliance Program

Privacy Policy · Sign In (for staff)

© 2019 Princeton Plasma Physics Laboratory. All rights reserved.

Princeton University
Princeton Plasma Physics Laboratory
P.O. Box 451
Princeton, NJ 08543-0451
GPS: 100 Stellarator Road
Princeton, NJ, 08540
(609) 243-2000