A Collaborative National Center for Fusion & Plasma Research
January 20, 2015,
1:30pm to 3:00pm

MBG Auditorium

COLLOQUIUM: Who Will Save the Tokamak - Harry Potter, Arnold Schwarzenegger, Shaquille O'Neal, or Donald Trump?

Professor Jeffrey Freidberg
Massachusetts Institute of Technology

This paper attempts to bridge the gap between tokamak reactor design and plasma physics. The analysis demonstrates that the overall design of a tokamak fusion reactor is determined largely by the constraints imposed by nuclear physics and fusion
engineering. Almost no plasma physics is required to determine the main design parameters of a reactor: aR B T pn I. 

The design makes demands on the plasma physics that must be satisfied in order to generate power. These demands are substituted into the well-known constraints arising in tokamak physics: the Troyon limit, Greenwald limit, kink stability limit, and bootstrap fraction limit. Unfortunately, a tokamak reactor designed on the basis of standard engineering and nuclear physics constraints does not scale to a reactor. Too much current is required to achieve the necessary confinement time for ignition. The combination of achievable bootstrap current plus current drive is not sufficient to generate the current demanded by the engineering design. Four possible solutions are discussed as alluded to in the title of the talk.

Colloquium Committee: 

The Princeton Plasma Physics Laboratory 2016-2017 Colloquium Committee is comprised of the following people. Please feel free to contact them by e-mail regarding any possible speakers or topics for future colloquia.

Carol Ann Austin, caustin@pppl.gov
Soha Aslam, saslam@pppl.gov
Ilya Dodin, idodin@pppl.gov
Dave Johnson, djohnson@pppl.gov

  • Carol Ann Austin 609-243-2484

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

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