Lab Leadership
Stewart Prager is 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.
Adam Cohen is the deputy director of operations for PPPL, overseeing functions ranging from engineering and project management to finance and communications. He joined the Laboratory in 2009 after enjoying a rich and varied career that included being in the nuclear submarine service in the U.S. Navy, working as chief operations officer at Argonne National Laboratory, and serving as senior science adviser at the U.S. Department of Energy. He earned his PhD in materials science from Northwestern University.
Michael Zarnstorff is the deputy director of research for PPPL where he supervises research that ranges from testing ideas for harnessing fusion to developing rockets for space flight. His job encompasses keeping projects aligned with DOE goals and envisioning new research opportunities for PPPL. An award-winning physicist and a co-discoverer of the bootstrap current, he joined PPPL in 1984 and has been deputy director for research since 2009. He earned his PhD in plasma physics from the University of Wisconsin.
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