Basic divertor operation in ITER-FEAT

摘要

the modelling studies being performed for steady state divertor operation of the ITER-FEAT design are summarized. Optimization of the divertor geometry reveals the importance of the proper target shape for a reduction of the peak Power loads. A high gas conductance between the divertor legs is also essential for maintaining acceptable conditions In the outer divertor, which receives a higher power loading than the inner divrtor. Impurity seeding, which would Be necessary if tritium co-deposition concerns precluded the use of carbon as the plasma facing material, can ensure The required high radiation level at acceptable Z_eff, and the divertor performance is not very sensitive to the choice Of radiating impurity.