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Describes how collisional detrapping of electrons leads to unstable drift tearing modes in tokamaks, suggesting implications for fusion research.
It is shown that the collisional detrapping of magnetically trapped electrons in tokamaks can excite drift tearing modes with high azimuthal mode numbers. For normal temperature gradients (dlnTₑdlnn>0), the modes are unstable in the collisional regime (νeff>ω_*e), but stable in the collisionless regime (νeff<ω_*e).
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Chen et al. (1977) studied this question.
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