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Plasma Control System Chapter | 8 257
FIGURE 8.1 Loops in a linear model describing the ITER plasma configuration. (Copyright
ITER Organisation, 2017).
After the states have been identified, we calculate the matrix coefficients
using the following algorithm:
a. Calculation of the base plasma configuration using the given poloidal coil
currents and plasma parameters. As a rule, basic configurations are derived
from snap-shots of discharge scenarios. A base configuration is calculated
using free-boundary equilibrium codes. ∂ Ψ
b. Calculation of the coefficients for matrix L = (see Eq. 8.7) L =∂Ψ¯∂II=I 0
3
3
∂ Ψ ∆ Ψ I ∂ II 0
=
th
through relation L 3, { ij} ≡ i ≅ i by varying the j circuit current L3i,j≡∂Ψi∂IjI=I ∆Ψi∆Ij
0
I ∂ j II 0 I ∆ j
=
relative to the base value. Here, ∆ψ is the flux change in the ith circuit
i
