Fredrickson E D, Gorelenkov N, Cheng C Z, Bell R, Darrow D, Johnson D, Kaye S, LeBlanc B, Menard J, Kubota S, Peebles W
Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA.
Phys Rev Lett. 2001 Oct 1;87(14):145001. doi: 10.1103/PhysRevLett.87.145001. Epub 2001 Sep 13.
Neutral-beam-driven compressional Alfvén eigenmodes at frequencies below the ion cyclotron frequency have been observed and identified for the first time in the National Spherical Torus Experiment. The modes are observed as a broad spectrum of nearly equally spaced peaks in the frequency range from approximately 0.2omega(ci) to approximately 1.2omega(ci). The frequency has a scaling with toroidal field and plasma density consistent with Alfvén waves. The modes have been observed with high bandwidth magnetic pickup coils and with a reflectometer.
在国家球形环面实验中首次观测并识别出了频率低于离子回旋频率的中性束驱动压缩阿尔文本征模。这些模式在频率范围从大约0.2ω(ci)到大约1.2ω(ci)内表现为一系列近乎等间距的宽谱峰。频率与环向场和等离子体密度的标度关系与阿尔文波一致。这些模式已通过高带宽磁拾波线圈和反射计观测到。
