Page 237 - Fundamentals of Magnetic Thermonuclear Reactor Design
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218 Fundamentals of Magnetic Thermonuclear Reactor Design
FIGURE 7.3 Divertor configuration of ITER reactor (CDA phase, beginning of 1990s) [3].
q(x) is the density of heat flow hitting the divertor target.
Therefore, the divertor reduces impurity content, prohibiting impurities
from the wall from entering the confined plasma. Another important purpose of
the divertor is to take helium ash and impurities out of the reactor by concentrat-
ing them closer to cryosorption pumps and intensifying their removal.
The divertor configuration is an example of how the design of a sophisticat-
ed electrical physics device can be optimised to give te most effective division
of technological functions between different elements. The previous chapter
addressed this issue in relation to the vacuum system. Here we shall touch upon
some thermal physical aspects.
The walls of the discharge and divertor chambers together make up a non-uni-
formly loaded toroidal structure located inside other reactor structures (the cryo-