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@TECHREPORT{Michelato:166446,
author = {Michelato, P. and Bertucci, M. and Navitski, A. and Singer,
W. and Singer, X. and Tamashevich, Y. and Pagani, C.},
title = {{A}n x-ray fluorescence probe for defect detection in
superconducting 1.3 {GH}z cavities},
number = {TUP110},
reportid = {DESY-2014-01350, TUP110},
note = {Proceedings will be published on JACoW},
abstract = {The aim of this project is to develop a system for defect
detection by means of X-ray fluorescence (XRF) analysis. XRF
is a high sensitivity spectroscopy technique allowing the
detection of trace element content, such as the few
microgram impurities, responsible for low cavity
performances if embedded in the equatorial region during
cavity manufacturing. The proposed setup is customized on
1.3 GHz TESLA-type niobium cavities: both the detector and
the X-ray excitation source are miniaturized so to allow the
probe to enter within the 70 mm iris diameter and aside of
the HOM couplers. The detection-excitation geometry is
focused on cavity cell equator surface located at about 103
mm from the cavity axis, with an intrinsic spot-size of
about 10 mm. The measuring head will be settled on a high
angular resolution optical inspection system at DESY,
exploiting the experience of OBACHT. Defect position is
obtained by means of angular inner surface scanning.
Quantitative determination of defect content can be carried
out by means of the so called fundamental parameters
technique with a Niobium standard calibration.},
month = {Sep},
date = {2013-09-23},
organization = {16th International Conference on RF
Superconductivity, Paris (France), 23
Sep 2013 - 27 Sep 2013},
cin = {FLA / MKS3 / MIN / MPL},
cid = {I:(DE-H253)FLA-20120731 / I:(DE-H253)MKS3-20210408 /
I:(DE-H253)MIN-20120731 / I:(DE-H253)MPL-20120731},
pnm = {Facility (machine) ILC $R\&D$ (POF2-ILC-20130405)},
pid = {G:(DE-H253)POF2-ILC-20130405},
experiment = {EXP:(DE-H253)ILC(machine)-20150101},
typ = {PUB:(DE-HGF)15},
url = {https://bib-pubdb1.desy.de/record/166446},
}