http://www.cnr.it/ontology/cnr/individuo/prodotto/ID18821
Quality measurement of niobium thin films for Nb/Cu Superconducting RF cavities (Articolo in rivista)
- Type
- Label
- Quality measurement of niobium thin films for Nb/Cu Superconducting RF cavities (Articolo in rivista) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1088/0957-0233/18/8/003 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://www.scopus.com/record/display.url?eid=2-s2.0-34547490189&origin=inward (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- Google Scholar (literal)
- Scopu (literal)
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- CNR, Istituto di cibernetica \"Edoardo Caianiello\" (literal)
- Titolo
- Quality measurement of niobium thin films for Nb/Cu Superconducting RF cavities (literal)
- Abstract
- Niobium-coated copper resonator cavities are an interesting alternative to
bulk niobium ones for superconducting RF (SCRF) applications to particle
accelerators. Magnetron sputtering is the technology developed at CERN
for depositing niobium films and applied over the past 20 years.
Unfortunately, the observed degradation of the quality factor with increasing
cavity voltage, not completely understood, prevents their use in future large
accelerators designed to work at gradients higher than 30 MV m
with
quality factors in the 10
10
(or higher) region. At the beginning of the new
millennium, new deposition techniques were proposed to overcome the
difficulties encountered with magnetron sputtering. This paper presents the
main analysis applied to the niobium films to investigate their quality and
the obtained results. The correlations between the niobium film properties
and the RF performances of accelerating cavities are summarized. The
properties of niobium films obtained by magnetron sputtering and by
cathodic arc deposition in ultra-high vacuum (UHVCA) are compared. The
UHVCA-produced Nb films have structural and transport properties closer
to the bulk ones, providing a promising alternative for niobium coated, high
voltage, high Q, copper RF cavities with respect to the standard magnetron
sputtering technique. (literal)
- Prodotto di
- Autore CNR
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