Abstract
We present an analysis of the energy flux to the axisymmetric limiter in Ignitor for plasmas with elongation κ from 1.0 to 1.32 and midplane scrape off distances λ from 0.5 cm to 3.0 cm. We find that the elongation for a given scrape-off distance is limited by the allowable limiter edge heat load. We also find that by varying the elongation as a function of scrape-off distance, we can limit the peak energy flux to approximately 300 W/cm 2 for 0.5 cm ≦ λ ≦ 3.0 cm, assuming 4.5 MW total power incident on the limiter.
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