DocumentCode
968896
Title
High fields in superconducting Nb3 Sn accelerating structures
Author
Arnolds, G. ; Blaschke, R. ; Piel, H. ; Proch, D.
Author_Institution
IEEE TMAG
Volume
15
Issue
1
fYear
1979
fDate
1/1/1979 12:00:00 AM
Firstpage
613
Lastpage
615
Abstract
Several X-band three-cell and nine-cell accelerating structures were fabricated from bulk niobium and coated with a Nb3 Sn layer by the vapour diffusion technique. To determine the quality of the Nb3 Sn layer the temperature dependent surface impedance was measured in the range 25 K 
K at low field level. From this data material parameters as Tc , Δ/kTc , λ0 and ρn were calculated. The high field behaviour of the cavities was investigated for temperatures 4.2 K K. Maximum surface fields of 45 mT were reached corresponding to an accelerating field of Eacc = 6 MV/m in the π/2-mode. The results of low and high field measurements with respect to the fabrication and treatment of the Nb3 Sn-layer are discussed.
K at low field level. From this data material parameters as T K. Maximum surface fields of 45 mT were reached corresponding to an accelerating field of EKeywords
Accelerator cavities, superconducting; Acceleration; Fabrication; Impedance measurement; Niobium; Superconducting epitaxial layers; Surface impedance; Surface treatment; Temperature dependence; Temperature distribution; Tin;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.1979.1060077
Filename
1060077
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