Enhancement and Suppression of Density Fluctuations around Electron Drift Frequency in Heliotron E Plasmas Measured Using CO2 Laser Phase Contrast Method
Enhancement and Suppression of Density Fluctuations around Electron Drift Frequency in Heliotron E Plasmas Measured Using CO2 Laser Phase Contrast Method
复制标题
CO2激光相衬法测量的Heliotron E等离子体中电子漂移频率附近密度波动的增强和抑制
DOI：
10.1143/jpsj.65.3434
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发表时间：
1996
影响因子：
1.7
通讯作者：
T. Obiki
中科院分区：
文献类型：
--
作者：
S. Kado;H. Nakatake;K. Muraoka;K. Kondo;F. Sano;T. Mizuuchi;S. Besshou;H. Okada;K. Nagasaki;H. Funaba;T. Hamada;K. Ida;M. Wakatani;T. Obiki
在Heliotron E中观察到了电子密度在电子漂移频率附近起伏的增强和抑制。这种行为对应于密度曲线的变化。当密度分布在内部区域达到峰值时，围绕该频率的密度波动得到增强，并且抑制与密度分布的平坦化相关联。的频率，波数和碰撞制度的检查表明，最有可能的候选人负责驱动这些波动的不稳定性是无碰撞循环电子模式。
Enhancement and suppression of electron density fluctuations around the electron drift frequency was observed in Heliotron E. This behavior corresponded to changes in the density profiles. Density fluctuations around this frequency were enhanced when the density profile was peaked in the inner region, and suppression was associated with the flattening of the density profile. An examination of the frequency, wavenumber, and collisionality regimes suggested that the most likely candidate for the instability responsible for driving these fluctuations is the collisionless circulating electron mode.