Alpha heating and isotopic mass effects in JET plasmas with sawteeth
Alpha heating and isotopic mass effects in JET plasmas with sawteeth
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DOI：
10.1088/0029-5515/56/3/036013
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发表时间：
2016-02
期刊：
影响因子：
3.3
通讯作者：
R. Budny
中科院分区：
文献类型：
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作者：
R. Budny
对欧洲联合环面（JET） 1997年DTE1运动中的α加热实验进行了重新研究。几个与氚含量和热氢同位素质量相关的效应削弱了α加热被明显观察到的结论。这些效应延迟了显著锯齿碰撞的发生，使得电子和离子温度Te和Ti达到更高的值。在其他条件相同的情况下，放电时Te和Ti通常较高，并且观察到Ti， Te和总存储能量的显着缩放。较高的Ti导致离子电子加热速率的增加，其幅度与α电子加热的计算结果相当。其他加热/损耗过程的速率也具有类似的量级。假设观察到的Ti结垢与测量剖面在质量上一致，而不调用α加热
The alpha heating experiment in the Joint European Torus (JET) 1997 DTE1 campaign is re-examined. Several effects correlated with tritium content and thermal hydrogenic isotopic mass weaken the conclusion that alpha heating was clearly observed. These effects delayed the occurrence of significant sawtooth crashes allowing the electron and ion temperatures Te and Ti to achieve higher values. Under otherwise equal circumstances Te and Ti were typically higher for discharges with higher , and significant scaling of Ti, Te, and total stored energy with were observed. The higher Ti led to increased ion–electron heating rates with magnitudes comparable to those computed for alpha electron heating. Rates of other heating/loss processes also had comparable magnitudes. Simulations of Te assuming the observed scaling of Ti are qualitatively consistent with the measured profiles, without invoking alpha heating