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首页> 外文期刊>Plasma physics and controlled fusion >3rd harmonic electron cyclotron resonant heating absorption enhancement by 2nd harmonic heating at the same frequency in a tokamak
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3rd harmonic electron cyclotron resonant heating absorption enhancement by 2nd harmonic heating at the same frequency in a tokamak

机译：托卡马克中相同频率的二次谐波加热增强三次谐波电子回旋共振加热吸收

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摘要

The fundamental mechanisms responsible for the interplay and synergy between the absorption dynamics of extraordinary-mode electron cyclotron waves at two different harmonic resonances (the 2nd and 3rd) are investigated in the TCV tokamak. An enhanced 3rd harmonic absorption in the presence of suprathermal electrons generated by 2nd harmonic heating is predicted by FokkerPlanck simulations, subject to complex alignment requirements in both physical space and momentum space. The experimental signature for the 2nd/3rd harmonic synergy is sought through the suprathermal bremsstrahlung emission in the hard x-ray range of photon energy. Using a synthetic diagnostic, the emission variation due to synergy is calculated as a function of the injected power and of the radial transport of suprathermal electrons. It is concluded that in the present experimental setup a synergy signature has not been unambiguously detected. The detectability of the synergy is then discussed with respect to variations and uncertainties in the plasma density and effective charge in view of future optimized experiments.
机译：在TCV托卡马克中，研究了在两种不同的谐波共振（第二和第三次共振）下，超模电子回旋波的吸收动力学之间相互作用和协同作用的基本机理。 FokkerPlanck仿真预测，在存在由二次谐波加热产生的超热电子的情况下，增强的三次谐波吸收能力，同时要满足物理空间和动量空间中复杂的对准要求。通过在光子能量的硬X射线范围内的超热致辐射来寻找2次/ 3次谐波协同效应的实验特征。使用合成诊断程序，可以计算由于协同作用引起的发射变化，该变化是注入功率和超热电子径向传输的函数。可以得出结论，在本实验装置中，并未明确检测到协同作用特征。鉴于未来的优化实验，然后针对血浆密度和有效电荷的变化和不确定性讨论了协同作用的可检测性。

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