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首页> 外文期刊>Technical physics letters: Letters to the Russian journal of applied physics >Features of the Microwave Radiation under the Fan Instability Development and Accelerated Electron Interaction with Magnetic Ripples in the FT- 2 Tokamak Ohmically Heated Plasma
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Features of the Microwave Radiation under the Fan Instability Development and Accelerated Electron Interaction with Magnetic Ripples in the FT- 2 Tokamak Ohmically Heated Plasma

机译：FT-2托卡马克欧姆加热等离子体中风扇不稳定性发展和加速的电子与磁波纹相互作用下的微波辐射特征

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摘要

Results of observation of anomalously intense microwave radiation (MR) in the electron plasma frequency range of 10–20 GHz that is generated continuously during ohmic heating of moderately dense plasma in the FT-2 tokamak are presented. Its appearance is associated with development of the “fan” plasma instability, and the presence of a large number of the local ripples of the toroidal magnetic field. It was found that MR is accompanied by the short gigantic and less intense flashes in the range of magnetic broadening of the first harmonic of the electron gyrofrequency (57–75 GHz). As is known, the latter occurs upon maser amplification of the synchrotron radiation of accelerated electrons interacting with the harmonics of local magnetic ripples in an autoresonance cyclotron mode. In our conditions, due to the nonlinear transformation of plasma waves into electromagnetic ones under the buildup of the fan instability, collective radiation (CR) is generated. Therefore, an abnormally high MR-intensity is probably due to CR maser amplification, whereas gigantic flashes occur during the self-excitation of maser amplifier under suitable conditions.
机译：给出了在FT-2托卡马克中中等密度等离子体的欧姆加热过程中连续产生的10-20 GHz电子等离子体频率范围内异常强微波辐射（MR）的观察结果。它的出现与“扇形”等离子体不稳定性的发展以及环形磁场的大量局部波纹的存在有关。研究发现，在电子陀螺频率（57-75 GHz）的一次谐波的磁展宽范围内，MR伴随着巨大的短闪和不那么强烈的闪光。众所周知，后者是在自激回旋加速器模式下，在加速电子的同步加速器辐射与局部磁波纹的谐波相互作用而进行的激射辐射放大之后发生的。在我们的条件下，由于在风扇不稳定的情况下将等离子体波非线性转换为电磁波，因此产生了集体辐射（CR）。因此，异常高的MR强度可能是由于CR maser放大引起的，而在适当条件下在maser放大器的自激过程中会出现巨大的闪烁。

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