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The confinement of iron injected by the laser ablation technique in the low field and low current Tokamak TJ-1, has been studied as a function of the toroidal field and plasma density. Results of these scans seem to fit within a neoclassical picture of plasma confinement. The impurity confinement time follows the ion energy confinement time to which it is compared.
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Zurro et al. (1988) studied this question.
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