Q[sub 0] Degradation of LANL 700-MHZ [beta]=0.64 Elliptical Cavities and ANL 340 MHZ Spoke Cavities

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The quality factor (Q{sub 0}) of most of the six LANL {beta} = 0.64 700-MHz 5-cell elliptical cavities starts to drop at E{sub acc} = 8-10 MV/m, which may be related to multipacting. Residual resistances of these cavities were measured to be 5.0-7.6 n{Omega}. The sensitivity of surface resistance to the external magnetic field was measured to be 0.22 n{Omega}/mG. Q disease tests have shown no significant Q{sub 0} degradation for both elliptical cavities and a spoke cavity with our 100 {micro}m BCP.

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3 p.

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Tajima, T. (Tsuyoshi); Chan, K. D. (Kwok-Chi D.); Edwards, R. L. (Randall L.); Gentzlinger, R.C. (Robert C.); Kelley, J. P. (John Patrick); Krawczyk, F. L. (Frank L.) et al. January 1, 2002.

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Description

The quality factor (Q{sub 0}) of most of the six LANL {beta} = 0.64 700-MHz 5-cell elliptical cavities starts to drop at E{sub acc} = 8-10 MV/m, which may be related to multipacting. Residual resistances of these cavities were measured to be 5.0-7.6 n{Omega}. The sensitivity of surface resistance to the external magnetic field was measured to be 0.22 n{Omega}/mG. Q disease tests have shown no significant Q{sub 0} degradation for both elliptical cavities and a spoke cavity with our 100 {micro}m BCP.

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3 p.

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  • "Submitted to: Eighth European Particle Accelerator Conference, Paris, France, June 3-7, 2002"

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  • Report No.: LA-UR-02-3080
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 976183
  • Archival Resource Key: ark:/67531/metadc933006

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 2002

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 12:49 p.m.

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Tajima, T. (Tsuyoshi); Chan, K. D. (Kwok-Chi D.); Edwards, R. L. (Randall L.); Gentzlinger, R.C. (Robert C.); Kelley, J. P. (John Patrick); Krawczyk, F. L. (Frank L.) et al. Q[sub 0] Degradation of LANL 700-MHZ [beta]=0.64 Elliptical Cavities and ANL 340 MHZ Spoke Cavities, article, January 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc933006/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.