In the limit where the electron drift-wave frequency exceeds theelectron-ion collision frequency, drift-tearing modes are found to growwith a linear growth rate independent of resistivity and proportional tothe product of the electron inertial skin depth and the ion sound Larmorradius. The stabilization of these modes in collisionless andsemi-collisional regimes is investigated. The stabilization mechanism isrelated to the coupling and propagation of drift-acoustic perturbationsaway from the reconnecting mode-rational surface. Analytic and numericalsolutions of the four-field reduced fluid model in the slab geometryapproximation with constant electron temperature and negligible iontemperature are presented. The actual stability threshold can occur atvalues of the normalized tearing mode stability parameter Δ' ashigh as 102.\pacs{52.35.P}}\fnm{1}{Permanent address: Istituto Nazionale Fisica della Materia, Department of Energetics, Politecnico di Torino, Italy
drift-wave frequency が electron-ion collision frequency を超える極限において、drift-tearing modes は resistivity に依存せず、electron inertial skin depth と ion sound Larmor radius の積に比例する linear growth rate で成長することが見出される。collisionless および semi-collisional 領域におけるこれらのモードの安定化を調べる。安定化機構は、reconnecting mode-rational surface から離れた drift-acoustic perturbations の結合と伝播に関連する。constant electron temperature と negligible ion temperature を仮定した slab geometry approximation における four-field reduced fluid model の解析的および数値的解を提示する。実際の安定性閾値は、normalized tearing mode stability parameter Δ' が 10^2 もの高い値で発生し得る。 \pacs{52.35.P}\fnm{1}{Permanent address: Istituto Nazionale Fisica della Materia, Department of Energetics, Politecnico di Torino, Italy}