NDLI: High-Q niobium klyston cavities for use in gravitational wave detectors

Content Provider	IEEE Xplore Digital Library
Author	Furtado, S.R. Aguiar, O.D. Castro, P.J. Barroso, J.J.
Copyright Year	2009
Description	Author affiliation: Associated Plasma Laboratory, The National Institute for Space Research- INPE, São José dos Campos, Brazil (Castro, P.J.; Barroso, J.J.) \|\| Astrophysics Division, The National Institute for Space Research - INPE, São José dos Campos, Brazil (Furtado, S.R.; Aguiar, O.D.)
Abstract	The main purpose of this work was to measure the resonant frequency and the Q-factor for the niobium superconducting reentrant cavities to be used in parametric transducers of the gravitational wave detector Mario Schenberg. Many cavities were manufactured from niobium with high tantalum impurities (1420 ppm) and they were cryogenically tested to determine their resonance frequencies and unloaded electrical quality factors (Q0) related to the electromagnetic coupling. These cavities were closed using a niobium cover with tantalum impurities below 1000 ppm and the unloaded electrical quality factor Q0 = $2.65×10^{5}$ was obtained. Another cavity similar to the one used by the Australian detector Niobè and made of niobium with low tantalum impurities was also investigated. The unloaded quality factor measured for this cavity was Q0 = $6.35×10^{3}.$ The experimental tests were performed in the laboratories of the National Institute for Space Research (INPE) and the Institute for Advanced Studies (IEAv - CTA).
Starting Page	172
Ending Page	176
File Size	16014116
Page Count	5
File Format	PDF
ISBN	9781424453566
ISSN	16794389
DOI	10.1109/IMOC.2009.5427605
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-11-03
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Niobium Q factor Detectors Impurities Resonant frequency Testing Frequency measurement Transducers Manufacturing Resonance gravitational wave detector klystron cavity superconducting niobium parametric transducer
Content Type	Text
Resource Type	Article

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