Magnetic Fields and Magnetic Diagnostics for Tokamak Plasmas

Magnetic fields and tokamak plasmas
Alan Wootton
value for the decay index in the modeling is n = -0.2. We now compute the stable regions in
(g,τ Σ space), the results of which are shown in Figures 21.2 through 21.5. For the values
considered the best system is that of multipole sensing coils inside the vessel (Figure 21.2),
closely followed by the single B θ coils inside the vessel (Figure 21.4). For sensing coils outside
the vessel the operational space is restricted, more so in the case of single B θ sensors than for
multipole sensors. This is seen by comparing Figures 21.3 and 21.5.
Figure 22.2. Moment coils, inside vessel.
Figure 22.3. Moment coils outside vessel.
Figure 22.4. Single B θ coils inside vessel. Figure 22.5. Single B θ coils outside vessel.
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