Refining and Maintaining the Optimal Performance of the CEBAF SRF Systems

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CEBAF at Jefferson Lab is striving to achieve its maximum reliability at the maximum deliverable energy for physics experiments. The most critical part of this is the acceleration systems in the two linacs. The individual limiting characteristics of the 320 srf cavities, each with its own klystron and control system, continue to be refined as is the system for providing optimal setup tools to operations. The field-emission-stimulated discharges at the cold rf waveguide input window continue as the energy-limiting effect. In addition, operation at increased rf power levels have produced unanticipated heating in the region near the warm polymeric rf ... continued below

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24 Kilobytes pages

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Reece, C.; Benesch, J. & Preble, J. June 1, 2001.

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CEBAF at Jefferson Lab is striving to achieve its maximum reliability at the maximum deliverable energy for physics experiments. The most critical part of this is the acceleration systems in the two linacs. The individual limiting characteristics of the 320 srf cavities, each with its own klystron and control system, continue to be refined as is the system for providing optimal setup tools to operations. The field-emission-stimulated discharges at the cold rf waveguide input window continue as the energy-limiting effect. In addition, operation at increased rf power levels have produced unanticipated heating in the region near the warm polymeric rf windows. The latter has stimulated the migration to a more durable ceramic replacement window. During 2000, CEBAF encountered its first cryomodule helium leak into beam vacuum, most likely through an indium wire seal. Characterization of the leak and accommodation methods used will be described.

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24 Kilobytes pages

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  • PAC 2001, Chicago, IL (US), 06/18/2001--06/22/2001

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  • Report No.: JLAB-ACC-01-10
  • Report No.: DOE/ER/40150-1862
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 783609
  • Archival Resource Key: ark:/67531/metadc720213

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  • June 1, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 5, 2016, 8:29 p.m.

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Reece, C.; Benesch, J. & Preble, J. Refining and Maintaining the Optimal Performance of the CEBAF SRF Systems, article, June 1, 2001; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc720213/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.