Microwave longitudinal coupling impedance in ISABELLE vacuum chamber

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The purpose of this paper is to investigate the modes above the cutoff frequency of the ISABELLE vacuum chamber, and to measure some typical values of the longitudinal coupling impedance. (The investigation was limited to only those modes that have fields in the beam pipe.) Measurements show that the impedance, Z, between 2.6 and 2.8 GHz, can be as high as 10 x n ohms, where n is the ratio of the excitation frequency of the beam divided by the fundamental rotational frequency of the ISABELLE ring. Future work calls for an investigation of the coupling impedance above 2.8 GHz; … continued below

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13 pages

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Giordano, S. & Votruba, J. March 1, 1980.

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The purpose of this paper is to investigate the modes above the cutoff frequency of the ISABELLE vacuum chamber, and to measure some typical values of the longitudinal coupling impedance. (The investigation was limited to only those modes that have fields in the beam pipe.) Measurements show that the impedance, Z, between 2.6 and 2.8 GHz, can be as high as 10 x n ohms, where n is the ratio of the excitation frequency of the beam divided by the fundamental rotational frequency of the ISABELLE ring. Future work calls for an investigation of the coupling impedance above 2.8 GHz; preliminary work indicates that these impedances Z/n, can be considerably higher than 10 ohms.

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13 pages

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NTIS, PC A02/MF A01.

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  • March 1, 1980

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  • Jan. 22, 2018, 7:23 a.m.

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  • June 27, 2019, 12:43 p.m.

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Giordano, S. & Votruba, J. Microwave longitudinal coupling impedance in ISABELLE vacuum chamber, report, March 1, 1980; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc1056413/: accessed June 1, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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