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当电子回旋谐振脉塞(ECRM)工作于短毫米波和亚毫米波时,由于实验室和工厂所能获得的直流磁场所限,必须采用高次回旋谐波工作,这就使常规的ECRM产生许多困难。因而近期来出现一些研究工作,以寻求降低磁场为目的,本文建议利用轴向复合周期磁场。分析表明,可以达到上述目的,从而有可能构成一种新型的ECRM。 在本文的线性动力论分析中,阐明了周期磁场降低回旋脉塞工作磁场的机理是电子回旋波在周期磁场内退化为一系列电子回旋波的空间谐波。 文中导出了ACT—磁场ECRM的特性方程,从而可以确定器件的振荡频率、增长率和起振条件。
When ECRMs are operated in short millimeter and submillimeter waves, higher order gyration harmonics must be used because of the DC magnetic field available in laboratories and factories, which allows conventional ECRM generation Many difficulties Therefore, some researches have been carried out in the near future. In order to reduce the magnetic field, this paper proposes the use of axial composite periodic magnetic field. Analysis shows that this can be achieved, which may constitute a new type of ECRM. In the linear dynamical analysis of this paper, the mechanism that the periodic magnetic field reduces the work magnetic field of the turbulence-inducing plug is that the electron gyroscope degenerates into a series of space harmonics of the electron cyclotron in the periodic magnetic field. In this paper, we derive the characteristic equation of ACT-magnetic field ECRM, which can determine the oscillation frequency, growth rate and start-up conditions of the device.