Low energy muon spin rotation and point contact tunneling applied to niobium films for SRF cavities

Autor:	Junginger, Tobias, Calatroni, Sergio, Prokscha, Thomas, Proslier, Thomas, Salman, Zaher, Suter, Andreas, Terenziani, Giovanni, Zasadzinski, John
Jazyk:	angličtina
Rok vydání:	2015
Předmět:	Fundamentals SRF R&D - Other Materials Accelerators and Storage Rings Accelerator Physics
Popis:	Muon spin rotation (muSR) and point contact tunneling (PCT) are used since several years for bulk niobium studies. Here we present studies on niobium thin film samples of different deposition techniques (diode, magnetron and HIPIMS) and compare the results with RF measurements and bulk niobium results. It is consistently found from muSR and RF measurements that HIPIMS can be used to produce thin films of high RRR. Hints for magnetism are especially found on the HIPIMS samples. These could possibly contribute to the field dependent losses of superconducting cavities, which are strongly pronounced on niobium on copper cavities. Proceedings of the 17th International Conference on RF Superconductivity, SRF2015, Whistler, BC, Canada
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21ce84af47af7bd023bb945093fb19f7 http://cds.cern.ch/record/2288265 Zobrazit plný text záznamu