Computational modeling demonstrates marginal loss-cone microstability in a deuterium-helium-3 tandem mirror, indicating that suppression requires broad plug-edge gradients.
The drift-cyclotron loss-cone (DCLC) microstability of a deuterium-helium-3 tandem-mirror plug. A flute-mode electrostatic dispersion solver, cross-checked electromagnetically, maps the exact marginal-stability boundary. The design's warm-ion fill sits exactly on the stabilization knee: it clears DCLC only for sufficiently broad plug-edge gradients, with a weak residual cyclotron mode. Marginal but bounded and quantified; reported honestly.
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Ford et al. (2026) studied this question.
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