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Structural Investigations of Nitrogen-Doped Niobium for Superconducting RF Cavities

Major, M. and Alff, L. and Arnold, M. and Conrad, J. and Flege, S. and Grewe, R. and Pietralla, N. and Hug, F. (2017):
Structural Investigations of Nitrogen-Doped Niobium for Superconducting RF Cavities.
In: Proceedings of IPAC 2017, Copenhagen, Denmark, pp. 996-998, [Online-Edition: http://accelconf.web.cern.ch/AccelConf/ipac2017/papers/mopva...],
[Book Section]

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.

Item Type: Book Section
Erschienen: 2017
Creators: Major, M. and Alff, L. and Arnold, M. and Conrad, J. and Flege, S. and Grewe, R. and Pietralla, N. and Hug, F.
Title: Structural Investigations of Nitrogen-Doped Niobium for Superconducting RF Cavities
Language: English
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.

Title of Book: Proceedings of IPAC 2017, Copenhagen, Denmark
ISBN: ISBN 978-3-95450-182-3
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
05 Department of Physics
05 Department of Physics > Institute of Nuclear Physics
Date Deposited: 21 Jul 2017 09:36
Official URL: http://accelconf.web.cern.ch/AccelConf/ipac2017/papers/mopva...
Funders: Work supported by the German Federal Ministry for Education and Research (BMBF) under Grant No. 05H15RDRBA
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