Abstract
The present report deals with a numerical analysis of characteristics of poloidal divertors in the Fusion Experimental Reactor (abbreviated FER) now under the design study in JAERI. Diverted scrape-off plasmas are formulated and analyzed based on a fluid model including the interaction of the plasma with neutral particles through ionization and charge exchange reactions. The neutral particle behavior is calculated using Monte Carlo methods. The possibility of high density operation of the FER divertor is examined numerically and the pumping requirement for the helium ash exhaust is discussed. It is also shown that the same numerical model gives the results qualitatively consistent with the DIII divertor experiments.
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