DocumentCode
1882330
Title
Microscopic examination of defects located by thermometry in 1.5 GHz superconducting niobium cavities
Author
Knobloch, J. ; Durand, R. ; Muller, H. ; Padamsee, H.
Author_Institution
Newman Lab. of Nucl. Studies, Cornell Univ., Ithaca, NY, USA
Volume
3
fYear
1995
fDate
1-5 May 1995
Firstpage
1623
Abstract
A new high resolution, high speed thermometry system has been built at Cornell to permit the study of anomalous loss regions in 1.5 GHz superconducting Nb cavities in superfluid He. Following a cavity test, the cavity is dissected for examination of these regions in an electron microscope. Presented is a survey of the topographical and elemental characteristics of various defects found so far. Included are field emitters which were known to be active at the end of a cavity test, as well as those which processed
Keywords
accelerator cavities; crystal defects; electron microscopy; niobium; superconducting cavity resonators; temperature measurement; 1.5 GHz; cavity test; defects; electron microscopy; field emitters; high resolution thermometry; superconducting Nb cavities; Dielectric losses; Heating; Helium; Iron; Magnetic fields; Niobium; Pollution measurement; Scanning electron microscopy; Signal resolution; Testing;
fLanguage
English
Publisher
ieee
Conference_Titel
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location
Dallas, TX
Print_ISBN
0-7803-2934-1
Type
conf
DOI
10.1109/PAC.1995.505307
Filename
505307
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