helix shaped hollow-beam klystron

• Applicant: Professor Dr.-Ing. Heino Henke
• Subject Area: Electronic Semiconductors, Components and Circuits, Integrated Systems, Sensor Technology, Theoretical Electrical Engineering
• Term: from 2012 to 2015
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 215916061

The objective of the project is the design of a hollow-beam klystron with a rotating field in themodulating resonator, such that a helix shaped beam develops. That allows for higher currents,larger resonators, a higher output efficiency and a very efficient frequency multiplication.The project is supported by the DFG since 1.9.2012. A first design of a 10GHz klystron with 50%efficiency and 49dB gain is well advanced. Also, first results for a w-band klystron were achieved.The work was performed with in-house developed codes for particle tracking and particle-in-cellsimulations.The continuation of the project shall treat the design of an x-band klystron with higher azimuthalmodes, thus creating 3 or 4 helix shaped interwoven beams suited for very high powers (MW). Atw-band and for medium power (some 100W) a frequency tripling device shall be investigated, with30GHz input and 90GHz output resonators. In addition, work on the hollow-beam cathode has to becontinued.

• DFG Programme: Research Grants
• Participating Person: Dr.-Ing. Manfred Filtz