Effect of conductive perturber diameter on nonresonant measurementof interaction impedance for helical slow-wave structures |
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Authors: | Sun-Shin Jung Soukhov AV Gun-Sik Park |
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Affiliation: | Vacuum Electrophys. Lab., Seoul Nat. Univ.; |
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Abstract: | The measurement accuracy of the interaction impedance for a helical slow-wave structure (SWS) using the nonresonant perturbation method has been studied using conductive wire perturbers with different diameters. Data obtained by the measurement were compared with a rigorous numerical analysis. It is shown that the measured values of the interaction impedance for the helical SWS converge to those obtained by using a three-dimensional finite-element computational method when the diameter of the perturber is reduced to less than 10% of the helix diameter |
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