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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.
Taewan Noh, Warren F. Miller, Jr.
Nuclear Science and Engineering | Volume 124 | Number 1 | September 1996 | Pages 18-30
Technical Paper | doi.org/10.13182/NSE96-A24221
Articles are hosted by Taylor and Francis Online.
Using the operator form of a synthetic acceleration, the P1 acceleration [diffusion synthetic acceleration (DSA)] and P2 acceleration schemes for one-dimensional slab and the P1 and simplified P2 acceleration schemes for two-dimensional x-y geometry are derived. The convergence rate of each scheme for a simple model problem is compared, and the result is generalized by performing a Fourier analysis. In the one-dimensional case, the new second-moment P2 acceleration outperforms an earlier third-moment P2 acceleration developed by Miller and Larsen. However, it is still less efficient than P1 acceleration. Similar results show that the P1 acceleration converges faster than the simplified P2 acceleration in two-dimensional x-y geometry. These results confirm that one cannot simply assume that replacement of the DSA method with a higher order operator will lead to a smaller spectral radius.