Transport properties of H-mode plasmas with dominant electron heating in comparison to dominant ion heating at ASDEX Upgrade
Transport properties of H-mode plasmas with dominant electron heating in comparison to dominant ion heating at ASDEX Upgrade
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DOI：
10.1088/0029-5515/55/3/033006
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发表时间：
2015-03
期刊：
影响因子：
3.3
通讯作者：
F. Sommer;J. Stober;C. Angioni;E. Fable;M. Bernert;A. Burckhart;V. Bobkov;R. Fischer;C. Fuchs;R. McDermott;W. Suttrop;E. Viezzer
中科院分区：
文献类型：
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作者：
F. Sommer;J. Stober;C. Angioni;E. Fable;M. Bernert;A. Burckhart;V. Bobkov;R. Fischer;C. Fuchs;R. McDermott;W. Suttrop;E. Viezzer
分析了电子加热与离子加热相比对等离子体性能的影响，以便对未来的设备做出有效的预测。在ASDEX升级的新升级的电子回旋共振加热系统的能力，使这种分析可行的取代中性束注入。主要是电子加热等离子体进行了分析和比较，主要是离子加热等离子体。它的研究，如果他们表现出系统的不同，或者如果加热物种的变化是完全补偿从电子到离子的热交换。Sommer等人（2012 Nucl.Fusion 52 114018）提出了在高碰撞性下的等离子体的研究。在这里，这些以前的调查扩展到较低的碰撞。的全球等离子体参数显示出轻微的减少与增加电子加热所产生的离子温度的显着降低，而电子温度分布是不变的。密度曲线显示出强烈的峰值，其在改变加热混合物时保持不变。功率平衡分析表明，电子和离子之间的热交换的重要影响。电子和离子的温度和等离子体密度与传输模型TGLF建模。验证应用的代码的实验观察。线性gyrokinetic计算与GS 2发现离子温度梯度模式是占主导地位的微观不稳定性在所有分析的情况下。
The influence of electron heating compared to ion heating on plasma performance has been analysed in order to make valid projections towards future devices. The capabilities of the newly upgraded electron cyclotron resonance heating system at ASDEX Upgrade make this analysis feasible by replacing neutral beam injection. Dominantly electron heated plasmas are analysed and compared to dominantly ion heated plasmas. It is investigated if they behave systematically different or if the change of heated species is fully compensated by heat exchange from electrons to ions. Studies of plasmas at high collisionalities are presented in Sommer et al (2012 Nucl. Fusion 52 114018). Here, these former investigations are extended towards lower collisionalities. The global plasma parameters show a slight reduction with increasing electron heating arising from a significant decrease of the ion temperature, whereas the electron temperature profile is unchanged. The density profile shows a strong peaking which remains unchanged when modifying the heating mix. The power balance analysis shows an important impact of the heat exchange between electrons and ions. The electron and ion temperatures and the plasma density are modelled with the transport model TGLF. The experimental observations are reproduced verifying the applied code. Linear gyrokinetic calculations with GS2 found the ion temperature gradient mode to be the dominant microinstability in all analysed cases.