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Latest News
Max Planck’s ELISE reaches record values for ITER plasma heating
The Max Planck Institute for Plasma Physics (IPP) announced that it recently has achieved a new record for ion current density for neutral particle heating at its ELISE (Extraction from a Large Ion Source Experiment) experimental testing facility in Garching, Germany. ELISE is being used to test neutral beam injection (NBI) systems that will be used to heat the plasma of the ITER fusion experiment in France.
Patrick O’Rourke, Scott Ramsey, Brian Temple
Nuclear Science and Engineering | Volume 196 | Number 7 | July 2022 | Pages 792-810
Technical Paper | doi.org/10.1080/00295639.2021.2018926
Articles are hosted by Taylor and Francis Online.
This work applies the Lie Group Theory (LGT) to the neutron slowing-down equations for the n’th lethargy interval with the goal of defining the symmetry group associated with Dawn’s analytical solution. We also demonstrate two competing methods of the LGT and how they each result in the same solution and symmetry group. The two methods differ by taking advantage of the definition of a symmetry group from either a geometrical perspective or an algebraic perspective. The methods are the Traditional Lie Algorithm, which we apply to the equivalent system of ordinary differential equations for neutrons slowing down, as well as the Grigoriev-Meleshko Method, which we apply directly to the Volterra integral equation for neutrons slowing down. We also discuss the physical meaning of the symmetry group related to Dawn’s solution.