Design of Compact Multi-Megawatt Mode Converter

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Experience gained during recent operation of high power 11.424 GHz rf sources for accelerators led to new, more strict requirements on system components. One of the basic components of such a system is a mode converter that transforms the rectangular waveguide mode into the TE{sub 01} mode in circular waveguide. With such a converter, it is possible to minimize the use of WR90 rectangular waveguide which was shown to be a weak part of the previous system at power levels higher than 100 MW and pulse lengths on the order of a microsecond. We used several methods to design a ... continued below

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8 pages

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Dolgashev, V.A.; Tantawi, S.G.; Nantista, C.D. & /SLAC March 21, 2006.

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Experience gained during recent operation of high power 11.424 GHz rf sources for accelerators led to new, more strict requirements on system components. One of the basic components of such a system is a mode converter that transforms the rectangular waveguide mode into the TE{sub 01} mode in circular waveguide. With such a converter, it is possible to minimize the use of WR90 rectangular waveguide which was shown to be a weak part of the previous system at power levels higher than 100 MW and pulse lengths on the order of a microsecond. We used several methods to design a mode converter with extremely low parasitic mode conversion and compact size. These methods employ HFSS[4] and include multi-parameter searches, concurrent optimization with a mode-matching code Cascade[2], cascading of resulting S-matrices, and tolerance analysis using perturbation techniques. This report describes the design methods and presents results.

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8 pages

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  • Prepared for 7th Workshop on High Energy Density and High Power RF, Kalamata, Greece, 13-17 Jun 2005

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  • Report No.: SLAC-PUB-11782
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 877971
  • Archival Resource Key: ark:/67531/metadc880284

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • March 21, 2006

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 9, 2016, 7:55 p.m.

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Dolgashev, V.A.; Tantawi, S.G.; Nantista, C.D. & /SLAC. Design of Compact Multi-Megawatt Mode Converter, article, March 21, 2006; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc880284/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.