State of the art of multicell SC Cavities and Perspectives

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Superconducting cavity technology has made major progresses in the last decade with the introduction of high purity niobium on an industrial scale and, at the same time, by an improved understanding of the limiting processes in cavity performance, such as multipacting, field emission loading and thermal breakdown. Multicell niobium cavities for Beta=1 particle acceleration, e.g. for the TESLA project, are routinely exceeding gradients of E{sub acc}=20 MV/m after the application of surface preparation techniques such as buffered chemical polishing or electropolishing, high pressure ultrapure water rinsing, UHV heat treatment and clean-room assembly. The successes of the technology for Beta=1 accelerators ... continued below

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144 KILOBYTES pages

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Kneisel, Peter June 1, 2002.

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Description

Superconducting cavity technology has made major progresses in the last decade with the introduction of high purity niobium on an industrial scale and, at the same time, by an improved understanding of the limiting processes in cavity performance, such as multipacting, field emission loading and thermal breakdown. Multicell niobium cavities for Beta=1 particle acceleration, e.g. for the TESLA project, are routinely exceeding gradients of E{sub acc}=20 MV/m after the application of surface preparation techniques such as buffered chemical polishing or electropolishing, high pressure ultrapure water rinsing, UHV heat treatment and clean-room assembly. The successes of the technology for Beta=1 accelerators has triggered a whole set of possible future applications for Beta < 1 particle acceleration such as spallation neutron sources (SNS, ESS), transmutation of nuclear waste (TRASCO, ASH) or rare isotopes (RIA). The most advanced of these projects is SNS now under construction at Oak Ridge National Laboratory. This paper will review the technical solutions adopted to advance SRF technology and their impact on cavity performance, based on the SNS prototyping efforts. Work supported by U.S. DOE contract DE-AC05-84ER40150

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144 KILOBYTES pages

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  • EPAC 2002, Paris (FR), 06/03/2002--06/07/2002; Other Information: PBD: 1 Jun 2002

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  • Report No.: JLAB-ACT-02-03
  • Report No.: DOE/ER/40150-2087
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 795626
  • Archival Resource Key: ark:/67531/metadc742464

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  • June 1, 2002

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  • Oct. 19, 2015, 7:39 p.m.

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  • Feb. 5, 2016, 8:37 p.m.

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Kneisel, Peter. State of the art of multicell SC Cavities and Perspectives, article, June 1, 2002; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc742464/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.