Discussion of possible evidence for non-linear BCS resistance in SRF cavity data to model comparison

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Very powerful RF cavities are now being developed for future large-scale particle accelerators such as the International Linear Collider (ILC). The basic model for the cavity quality factor Q-slope in high gradient SRF cavities, i.e. the reduction of Q with increasing operating electric and magnetic fields, is the so-called thermal feedback model (TFBM). Most important for the agreement between the model and experimental data, however, is which different surface resistance contributions are included in the TFBM. This paper attempts to further clarify if the non-linear pair-breaking correction to the BCS resistance [1,2] is among those surface resistance contributions, through a ... continued below

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5 pages

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Bauer, P.; Solyak, N.; /Fermilab; Ciovati, G.L.; Lab, /Jefferson; Eremeev, G. et al. July 1, 2005.

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Very powerful RF cavities are now being developed for future large-scale particle accelerators such as the International Linear Collider (ILC). The basic model for the cavity quality factor Q-slope in high gradient SRF cavities, i.e. the reduction of Q with increasing operating electric and magnetic fields, is the so-called thermal feedback model (TFBM). Most important for the agreement between the model and experimental data, however, is which different surface resistance contributions are included in the TFBM. This paper attempts to further clarify if the non-linear pair-breaking correction to the BCS resistance [1,2] is among those surface resistance contributions, through a comparison of TFBM calculations with experimental data from bulk Nb cavities built and tested at several different laboratories.

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5 pages

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  • Presented at 12th International Workshop on RF Superconductivity, Ithaca, New York, 10-15 Jul 2005

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  • Report No.: FERMILAB-CONF-05-299-TD
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 875547
  • Archival Resource Key: ark:/67531/metadc875174

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  • July 1, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 23, 2016, 4:04 p.m.

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Bauer, P.; Solyak, N.; /Fermilab; Ciovati, G.L.; Lab, /Jefferson; Eremeev, G. et al. Discussion of possible evidence for non-linear BCS resistance in SRF cavity data to model comparison, article, July 1, 2005; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc875174/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.