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Structural Investigations of Nitrogen-Doped Niobium for Superconducting RF Cavities

Major, M. ; Alff, L. ; Arnold, M. ; Conrad, J. ; Flege, S. ; Grewe, R. ; Pietralla, N. ; Hug, F. :
Structural Investigations of Nitrogen-Doped Niobium for Superconducting RF Cavities.

[Konferenz- oder Workshop-Beitrag], (2017)

Kurzbeschreibung (Abstract)

Niobium is the standard material for superconducting radio frequency (SRF) cavities. Superconducting materials with higher critical temperature or higher critical magnetic field allow cavities to work at higher operating temperatures or higher accelerating fields, respectively. Enhancing the surface properties of the superconducting material in the range of the penetration depth is also beneficial. One direction of search for new materials with better properties is the modification of bulk niobium by nitrogen doping. In the Nb-N phase diagram the cubic δ- phase of NbN has the highest critical temperature (16 K). Already slight nitrogen doping of the α-Nb phase results in higher quality factors. Nb samples were processed in the refurbished UHV furnace at IKP Darmstadt. The first results on the structural investigations of the processed Nb samples at the Materials Research Department of TU Darmstadt are presented.

Typ des Eintrags: Konferenz- oder Workshop-Beitrag (Keine Angabe)
Erschienen: 2017
Autor(en): Major, M. ; Alff, L. ; Arnold, M. ; Conrad, J. ; Flege, S. ; Grewe, R. ; Pietralla, N. ; Hug, F.
Titel: Structural Investigations of Nitrogen-Doped Niobium for Superconducting RF Cavities
Sprache: Englisch
Kurzbeschreibung (Abstract):

Niobium is the standard material for superconducting radio frequency (SRF) cavities. Superconducting materials with higher critical temperature or higher critical magnetic field allow cavities to work at higher operating temperatures or higher accelerating fields, respectively. Enhancing the surface properties of the superconducting material in the range of the penetration depth is also beneficial. One direction of search for new materials with better properties is the modification of bulk niobium by nitrogen doping. In the Nb-N phase diagram the cubic δ- phase of NbN has the highest critical temperature (16 K). Already slight nitrogen doping of the α-Nb phase results in higher quality factors. Nb samples were processed in the refurbished UHV furnace at IKP Darmstadt. The first results on the structural investigations of the processed Nb samples at the Materials Research Department of TU Darmstadt are presented.

Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Dünne Schichten
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 21 Jul 2017 09:36
ID-Nummer: ISBN 978-3-95450-182-3
Sponsoren: Work supported by the German Federal Ministry for Education and Research (BMBF) under Grant No. 05H15RDRBA
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