Mode Identification in the Iris-Loaded Waveguide of a RF Particle Separator

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The theoretical and practical aspects of the accelerating mode (TM01) in iris-loaded waveguides have been covered extensively in many reports and publications. The pulse shortening observed in linacs and the possible application of an iris-loaded waveguides as the deflecting structure for rf particle separators stimulated the interest in the nature of higher order modes. Some experimental results on higher order modes in iris-loaded waveguides are available in references. Results of studies done at CERN are not yet published; they were however communicated to the authors and represented the basis of work done at Brookhaven. A preliminary account of BNL results … continued below

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Hahn, H. & Halama, H. J. February 18, 1963.

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The theoretical and practical aspects of the accelerating mode (TM01) in iris-loaded waveguides have been covered extensively in many reports and publications. The pulse shortening observed in linacs and the possible application of an iris-loaded waveguides as the deflecting structure for rf particle separators stimulated the interest in the nature of higher order modes. Some experimental results on higher order modes in iris-loaded waveguides are available in references. Results of studies done at CERN are not yet published; they were however communicated to the authors and represented the basis of work done at Brookhaven. A preliminary account of BNL results was given in reference. The purpose of this report is to describe the model measurements which were necessary to determine the geometry of a brazed or electroformed prototype for a deflecting waveguide. At the same time, a systematic investigation of other than the deflecting mode was done to ensure a nondegenerate field solution at the operating frequency. The measurements are compared with computational results obtained on the IBM 7090 at BNL.

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  • February 18, 1963

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  • Feb. 5, 2022, 9:56 a.m.

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  • Nov. 27, 2022, 3:07 a.m.

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Thumbnail image of item number 1 in: 'Mode Identification in the Iris-Loaded Waveguide of a RF Particle Separator'.
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Hahn, H. & Halama, H. J. Mode Identification in the Iris-Loaded Waveguide of a RF Particle Separator, report, February 18, 1963; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc1255831/: accessed December 9, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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