Artificial Dielectric Ceramics for CEBAF's Higher-Order-Mode Loads

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The superconducting cavities of the Continuous Electron Beam Accelerator Facility (CEBAF) include 676 special loads fabricated with a new lossy ceramic material (AIN- glassy carbon) developed especially for CEBAF. The absorption of Higher-Order-Modes (HOM) RF power generated by the beam occurs inside the cavity vacuum at 2K. The cavity environment imposes strict conditions on the usable materials and the fabrication techniques. The absorbing material developed (based on the artificial dielectric model) is a ceramic with excellent vacuum, structural and thermal properties and has a complex permitivity independent of temperature between 1.5 and 700 K, making it an ideal material for ... continued below

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499 Kilobytes pages

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Campisi, Isidoro; Betto, Aldo; Branson, Ben & Summers, Lynda K. October 1, 1993.

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Description

The superconducting cavities of the Continuous Electron Beam Accelerator Facility (CEBAF) include 676 special loads fabricated with a new lossy ceramic material (AIN- glassy carbon) developed especially for CEBAF. The absorption of Higher-Order-Modes (HOM) RF power generated by the beam occurs inside the cavity vacuum at 2K. The cavity environment imposes strict conditions on the usable materials and the fabrication techniques. The absorbing material developed (based on the artificial dielectric model) is a ceramic with excellent vacuum, structural and thermal properties and has a complex permitivity independent of temperature between 1.5 and 700 K, making it an ideal material for superconducting cavity applications.

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499 Kilobytes pages

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  • 6th RF Superconductivity Workshop, Newport News, VA (US), 10/1993

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  • Report No.: CEBAF-PR-93-064
  • Report No.: DOE/ER/40150-2014
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 791940
  • Archival Resource Key: ark:/67531/metadc742590

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  • October 1, 1993

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  • Oct. 19, 2015, 7:39 p.m.

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  • Feb. 5, 2016, 7:50 p.m.

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Campisi, Isidoro; Betto, Aldo; Branson, Ben & Summers, Lynda K. Artificial Dielectric Ceramics for CEBAF's Higher-Order-Mode Loads, article, October 1, 1993; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc742590/: accessed November 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.