Powerful Magnetron Design, in particular for high frequencies (sub-THz) and for continuous wave- (cw-) operation

本研究计画是关于磁控管，一种电子束管，其中结构化的电子束与电磁共振结构相互作用。因此，可以在亚毫米波范围内的频率下产生电力。该范围具有很高的实际意义，因为它提供了许多技术和科学应用。我们的研究旨在开发一种全新的磁控管物理模型，具有按照明确定义的标准实现定量设计的潜力。因此，为后续项目铺平了道路，导致一个强大的，但仍然方便的高频发生器，用于所谓的太赫兹（THz）频率范围。一方面，新模型应能够建立操作和几何参数的优化指南，另一方面，检测新的操作模式。这里最重要的是磁控管的所谓连续波（或cw）操作，其在厘米波范围之外的频率下还不能实现。然而，对于各种应用，仅仅连续波操作将使磁控管的电势倍增。新型磁控管的一个特点是广泛应用一种称为超材料的新材料来实现其谐振结构。 该模型的发展，它的验证，并详细调查的操作模式说明了实际实验与个别组件和几个磁控管原型。为此，与乌克兰哈尔科夫的一家国际知名研究所建立了密切合作关系，该研究所在短毫米波范围磁控管的开发方面处于领先地位。相应的测量在汉堡和哈尔科夫两个地点进行。

This research project deals with the magnetron, an electron beam tube, in which a structured electron beam interacts with an electro-magnetic resonance structure. Thus electric power can be generated at frequencies in the sub-millimeter wave range. This range is of high actual interest, because it offers a number of technical and scientific applications.Our investigations are aiming to develop a completely new physical model of the magnetron with the potential to realize a quantitative design following well-defined criteria. Thus the road for a follow-up project shall be paved leading to a powerful but still handy high frequency generator for the so-called terahertz (THz) frequency range. The new model shall, on one side, be able to establish optimization guidelines for the operational and geometrical parameters and, on the other side, detect new modes of operation. Of prominent importance here is the so-called continuous wave (or cw) operation of the magnetron which could not yet be realized at frequencies beyond the centimeter wave range. However, just cw operation would multiply the potentials of the magnetron for various applications. A characteristic feature of the new class of magnetrons will be an extensive application of a new material, known as meta-material, in realizing its resonance structure. The development of the model, its verification, and the detailed investigation of the operational modes is illustrated by practical experiments with both individual components and several magnetron prototypes. To this end, a close cooperation with a research institute in Kharkiv, Ukraine, of high international reputation has been established, which is leading in the development of magnetrons for the short millimeter wave range. The corresponding measurements are performed at both locations, in Hamburg and in Kharkiv.