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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.

New research deepens understanding of Earth’s interaction with the solar wind

As the Earth orbits the sun, it plows through a stream of fast-moving particles that can interfere with satellites and global positioning systems. Now, a team of scientists at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) and Princeton University has reproduced a process that occurs in space to deepen understanding of what happens when the Earth encounters this solar wind.

New research deepens understanding of Earth’s interaction with the solar wind

As the Earth orbits the sun, it plows through a stream of fast-moving particles that can interfere with satellites and global positioning systems. Now, a team of scientists at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) and Princeton University has reproduced a process that occurs in space to deepen understanding of what happens when the Earth encounters this solar wind.

Lehigh University graduate student wins DOE award to conduct a portion of his doctoral thesis work at PPPL

Vincent Graber, a doctoral student in mechanical engineering at Lehigh University, has won a highly competitive award from the U.S Department of Energy (DOE) that he will use to conduct research at the DOE’s Princeton Plasma Physics Laboratory (PPPL) on the design of a critical device to help bring the fusion energy that powers the sun and stars to Earth.

Lehigh University graduate student wins DOE award to conduct doctoral thesis work at PPPL

Vincent Graber, a doctoral student in mechanical engineering at Lehigh University, has won a highly competitive award from the U.S Department of Energy (DOE) that he will use to conduct research at the DOE’s Princeton Plasma Physics Laboratory (PPPL) on the design of a critical device to help bring the fusion energy that powers the sun and stars to Earth.

Return of the Blob: Scientists find surprising link to troublesome turbulence at the edge of fusion plasmas

Blobs can wreak havoc in plasma required for fusion reactions. This bubble-like turbulence swells up at the edge of fusion plasmas and drains heat from the edge, limiting the efficiency of fusion reactions in doughnut-shaped fusion facilities called “tokamaks.” Researchers at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) have now discovered a surprising correlation of the blobs with fluctuations of the magnetic field that confines the plasma fueling fusion reactions in the device core. 

New aspect of understanding

Return of the Blob: Scientists find surprising link to troublesome turbulence at the edge of fusion plasmas

Blobs can wreak havoc in plasma required for fusion reactions. This bubble-like turbulence swells up at the edge of fusion plasmas and drains heat from the edge, limiting the efficiency of fusion reactions in doughnut-shaped fusion facilities called “tokamaks.” Researchers at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) have now discovered a surprising correlation of the blobs with fluctuations of the magnetic field that confines the plasma fueling fusion reactions in the device core. 

New aspect of understanding

New insights into the dynamic edge of fusion plasmas could help capture the power that drives the sun and stars

A major roadblock to producing safe, clean and abundant fusion energy on Earth is the lack of detailed understanding of how the hot, charged plasma gas that fuels fusion reactions behaves at the edge of fusion facilities called “tokamaks.” Recent breakthroughs by researchers at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) have advanced understanding of the behavior of the highly complex plasma edge in doughnut-shaped tokamaks on the road to capturing the fusion energy that powers the sun and stars.

New insights into the dynamic edge of fusion plasmas could help capture the power that drives the sun and stars

A major roadblock to producing safe, clean and abundant fusion energy on Earth is the lack of detailed understanding of how the hot, charged plasma gas that fuels fusion reactions behaves at the edge of fusion facilities called “tokamaks.” Recent breakthroughs by researchers at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) have advanced understanding of the behavior of the highly complex plasma edge in doughnut-shaped tokamaks on the road to capturing the fusion energy that powers the sun and stars.

Scientists explore the power of radio waves to help control fusion reactions

A key challenge to capturing and controlling fusion energy on Earth is maintaining the stability of plasma — the electrically charged gas that fuels fusion reactions — and keeping it millions of degrees hot to launch and maintain fusion reactions. This challenge requires controlling magnetic islands, bubble-like structures that form in the plasma in doughnut-shaped tokamak fusion facilities.

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