Results of the APT RF power coupler development for superconducting linacs.

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For the new baseline APT (Accelerator Production of Tritium) linac design, the power couplers are required to transmit 420 kW of CW RF power to the superconducting cavities at 700 MHz. These couplers consist of an airside waveguide-to-coax transition, an air/vacuum break made by two planar, coaxial windows, and a vacuum-side coaxial antenna section. The coaxial antenna allows adjustability of the RF matching to the superconducting cavities. Design, fabrication, and testing of the power coupler/window occurred over the last four years, and room temperature testing of the prototype design is complete. Coupler/window assemblies have transmitted power to 1 MW, CW ... continued below

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5 p.

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Schmierer, E. N. (Eric N.); Haynes, W. B. (William B.); Krawczyk, F. L. (Frank L.); Gautier, D. C. (Donald Cort); Gioia, J. G. (Jack G.); Madrid, M. A. (Michael A.) et al. January 1, 2001.

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Description

For the new baseline APT (Accelerator Production of Tritium) linac design, the power couplers are required to transmit 420 kW of CW RF power to the superconducting cavities at 700 MHz. These couplers consist of an airside waveguide-to-coax transition, an air/vacuum break made by two planar, coaxial windows, and a vacuum-side coaxial antenna section. The coaxial antenna allows adjustability of the RF matching to the superconducting cavities. Design, fabrication, and testing of the power coupler/window occurred over the last four years, and room temperature testing of the prototype design is complete. Coupler/window assemblies have transmitted power to 1 MW, CW and have handled full reflected 850 kW, CW over a limited standing-wave phase range. Couplers were tested with a portion of the outer conductor cooled by liquid nitrogen to study the effects of condensed gases. No hard multipacting barriers were encountered during any of this room temperature testing. Final results, conclusions, and lessons learned about the coupler design, fabrication, and testing will be discussed.

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5 p.

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  • Submitted to: The 10th Workshop on RF Superconductivity, September 6-11, 2001, Tsukuba City, Japan

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  • Report No.: LA-UR-01-4890
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 974715
  • Archival Resource Key: ark:/67531/metadc929603

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 2001

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 12:59 p.m.

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Schmierer, E. N. (Eric N.); Haynes, W. B. (William B.); Krawczyk, F. L. (Frank L.); Gautier, D. C. (Donald Cort); Gioia, J. G. (Jack G.); Madrid, M. A. (Michael A.) et al. Results of the APT RF power coupler development for superconducting linacs., article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc929603/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.