This paper presents results of quench localization on 3.9 GHz XFEL prototype cavities tested at LASA vertical test facility. Cavities have been equipped with OST second sound detectors and thermometry sensors. A first guess for quench position has been obtained from modal analysis. Second sound sensors confirmed the quench position resolving also the symmetry degeneracy given by the RF mode pattern analysis. In a subsequent vertical test, second sound and temperature sensors have been installed nearby the suspect quench position. From Thermometry mapping, a sudden increase in cavity temperature within a small region is evident, therefore confirming that a local thermal breakdown due to defect heating occurs in the predicted quench point. The quench region deduced with the mentioned techniques is eventually compared with results of optical inspection.

Quench detection diagnostics on 3.9 GHz XFEL cavities / M. Bertucci, A. Bosotti, L. Garolfi, P. Michelato, L. Monaco, D. Sertore, C. Pagani - In: SRF2013 : Proceedings of the 16. international conference on RF superconductivity / [a cura di] C. Antoine, S. Bousson, G. Martinet. - Paris : JACoW, 2014 Feb. - ISBN 978-3-95450-143-4. - pp. 710-713 (( Intervento presentato al 16. convegno International conference on RF superconductivity tenutosi a Paris nel 2013.

Quench detection diagnostics on 3.9 GHz XFEL cavities

C. Pagani
Ultimo
2014

Abstract

This paper presents results of quench localization on 3.9 GHz XFEL prototype cavities tested at LASA vertical test facility. Cavities have been equipped with OST second sound detectors and thermometry sensors. A first guess for quench position has been obtained from modal analysis. Second sound sensors confirmed the quench position resolving also the symmetry degeneracy given by the RF mode pattern analysis. In a subsequent vertical test, second sound and temperature sensors have been installed nearby the suspect quench position. From Thermometry mapping, a sudden increase in cavity temperature within a small region is evident, therefore confirming that a local thermal breakdown due to defect heating occurs in the predicted quench point. The quench region deduced with the mentioned techniques is eventually compared with results of optical inspection.
No
English
quench localization ; modal analysis ; second sound sensors ; superconducting RF ; particle accelerators ; superconducting linacs ; superconducting linear accelerators
Settore FIS/01 - Fisica Sperimentale
Intervento a convegno
Ricerca applicata
SRF2013 : Proceedings of the 16. international conference on RF superconductivity
C. Antoine, S. Bousson, G. Martinet
Paris
JACoW
feb-2014
710
713
4
978-3-95450-143-4
Volume a diffusione internazionale
International conference on RF superconductivity
Paris
2013
16
Convegno internazionale
Intervento inviato
http://ipnweb.in2p3.fr/srf2013/papers/tup102.pdf
M. Bertucci, A. Bosotti, L. Garolfi, P. Michelato, L. Monaco, D. Sertore, C. Pagani
Book Part (author)
none
273
Quench detection diagnostics on 3.9 GHz XFEL cavities / M. Bertucci, A. Bosotti, L. Garolfi, P. Michelato, L. Monaco, D. Sertore, C. Pagani - In: SRF2013 : Proceedings of the 16. international conference on RF superconductivity / [a cura di] C. Antoine, S. Bousson, G. Martinet. - Paris : JACoW, 2014 Feb. - ISBN 978-3-95450-143-4. - pp. 710-713 (( Intervento presentato al 16. convegno International conference on RF superconductivity tenutosi a Paris nel 2013.
info:eu-repo/semantics/conferenceObject
7
Prodotti della ricerca::03 - Contributo in volume
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/233749
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