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Division members promote the advancement of mathematical and computational methods for solving problems arising in all disciplines encompassed by the Society. They place particular emphasis on numerical techniques for efficient computer applications to aid in the dissemination, integration, and proper use of computer codes, including preparation of computational benchmark and development of standards for computing practices, and to encourage the development on new computer codes and broaden their use.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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Fusion Science and Technology
Latest News
Taking shape: Fusion energy ecosystems built with public-private partnerships
It’s possible to describe fusion in simple terms: heat and squeeze small atoms to get abundant clean energy. But there’s nothing simple about getting fusion ready for the grid.
Private developers, national lab and university researchers, suppliers, and end users working toward that goal are developing a range of complex technologies to reach fusion temperatures and pressures, confounded by science and technology gaps linked to plasma behavior; materials, diagnostics, and electronics for extreme environments; fuel cycle sustainability; and economics.
H. Reimerdes, R. J. Buttery, A. M. Garofalo, Y. In, R. J. La Haye, M. J. Lanctot, M. Okabayashi, J.-K. Park, M. J. Schaffer, E. J. Strait, F. A. Volpe
Fusion Science and Technology | Volume 59 | Number 3 | April 2011 | Pages 572-585
Lecture | Fourth ITER International Summer School (IISS2010) | doi.org/10.13182/FST11-A11698
Articles are hosted by Taylor and Francis Online.
Tokamak plasmas can be sensitive to external nonaxisymmetric magnetic perturbations that are several orders of magnitude smaller than the axisymmetric field. These perturbations, which are usually undesired and are referred to as error fields, can limit operation by braking the plasma rotation until an instability such as a tearing mode, a resistive wall mode, or an error field-driven locked mode leads to an unacceptable confinement degradation or a disruption. Auxiliary heating can have two competing effects: On one hand higher leads to a degradation of the error field tolerance through plasma amplification and stronger braking, and on the other hand higher toroidal rotation can tolerate a higher magnetic braking torque. A widely used technique to detect and correct error fields is based on the characteristic density dependence of the error field tolerance in ohmic plasmas. An alternative technique is based on the measurable plasma amplification of the error field in high- plasmas. However, the detection and correction of error fields in ITER will require a modification of the present techniques in order to avoid disruptions and deal with insufficient plasma amplification of the error field at low , before the full set of auxiliary heating systems will be available. The adaptation of current techniques to address these concerns is likely, but an experimental demonstration as well as an improved physics basis is needed and remains the subject of current research.