Low-beta equilibrium vs. high-beta equilibrium

With the pressure increasing, the magnetic axis usually shifts to the low-field-side of the device, as is shown in Fig. 32.

Figure 32: Comparison of two equilibria obtained with $P_0 = 10^4 \ensuremath {\operatorname {Pasca}}$ (left) and $P_0 = 10^5 \ensuremath {\operatorname {Pasca}}$ (right), respectively, where $P_0$ is the pressure at the magnetic axis. All the other parameters are the same for the two equilibria, $\alpha = 1.0$, $\beta = 1.0$, $P_b = 10^{- 1} \ensuremath {\operatorname {Pasca}}$, $g_0 = 1.0 T m$, $I_{\phi } = 500 \ensuremath {\operatorname {kA}}$, and the LCFS is given by miller's formulas (457) and (458) with $R_0 = 1.7$, $a = 0.45$, $\kappa = 1.7$, and $\delta = 0.6$.