标题： 不完全重联的锯齿崩溃模型 显示英文标题

标题： Model for Incomplete Reconnection in Sawtooth Crashes

摘要： 一种关于锯齿崩溃中不完全重联的模型被提出。 在锯齿崩溃阶段，重联流入会自洽地将高压核心输运到重联区域，从而提高那里的压力梯度。 如果重联区域的反磁漂移速度超过阈值，重联就会停止，这可能解释了不完全重联的现象。 重联后的磁剪切松弛可能解释了之前报道的理想交换不稳定性失稳现象。 原理验证的两流体模拟证实了这一基本图景。 该模型的预测与Mega Ampere Spherical Tokamak的数据相符。 讨论了该模型在锯齿传输建模中的应用。 这些结果应适用于各种托卡马克装置，包括ITER。 显示英文摘要

摘要： A model for incomplete reconnection in sawtooth crashes is presented. The reconnection inflow during the crash phase of sawteeth self-consistently convects the high pressure core toward the reconnection site, raising the pressure gradient there. Reconnection shuts off if the diamagnetic drift speed at the reconnection site exceeds a threshold, which may explain incomplete reconnection. The relaxation of magnetic shear after reconnection stops may explain the destabilization of ideal interchange instabilities reported previously. Proof-of-principle two-fluid simulations confirm this basic picture. Predictions of the model compare favorably to data from the Mega Ampere Spherical Tokamak. Applications to transport modeling of sawteeth are discussed. The results should apply across tokamaks, including ITER.