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  • Thermal shield | Practising the embrace

    In the ITER Assembly Hall, fitting tests are underway on two outboard thermal shield panels. Once paired, the 11-metre-tall, silver-plated components will [...]

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    Another concentric circle has been drawn at the bottom of the machine assembly pit, formed by the temporary supports recently installed for poloidal field coil [...]

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    The ITER superconducting coils thrive on a simple diet of electrical power and cooling fluids. The industrial installation on site is scaled to provide both, bu [...]

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    For one of the most demanding technological components of the ITER machine—the first wall of the blanket—the European Domestic Agency Fusion for Energy made the [...]

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Of Interest

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Measuring hard-to-diagnose 3D plasmas

A simulated plasma in the Large Helical Device showing the thin blue saddle coils that researchers used to make diagnostic measurements with the new computer code. (Click to view larger version...)
A simulated plasma in the Large Helical Device showing the thin blue saddle coils that researchers used to make diagnostic measurements with the new computer code.
Scientists at the US Department of Energy's Princeton Plasma Physics Laboratory (PPPL) and the National Institute for Fusion Science (NIFS) in Japan have developed a rapid method for meeting a key challenge for fusion science. The challenge has been to simulate the diagnostic measurement of plasmas produced by twisting, or 3D, magnetic fields in fusion facilities. While such fields characterize facilities called stellarators, otherwise symmetric, or 2D, facilities such as tokamaks also can benefit from 3D fields.

Researchers led by PPPL physicist Sam Lazerson have now created a computer code that simulates the required diagnostics, and have validated the code on the Large Helical Device stellarator in Japan. Called "Diagno v2.0," the new program utilizes information from previous codes that simulate 3D plasmas without the diagnostic measurements. The addition of this new capability could, with further refinement, enable physicists to predict the outcome of 3D plasma experiments with a high degree of accuracy.

Read more here.


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