SRF2021 - List of Keywords (positron)

Paper	Title	Other Keywords	Page
TUOFDV03	Vacancy-Hydrogen Dynamics and Magnetic Impurities During Mid-T Bake	cavity, niobium, lattice, interface	342
	M. Wenskat, C. Bate, D. Reschke, J. Schaffran, L. Steder, H. Weise DESY, Hamburg, Germany C. Bate, G.D.L. Semione, A. Stierle University of Hamburg, Hamburg, Germany M. Butterling, E. Hirschmann, M.O. Liedke, A. Wagner HZDR, Dresden, Germany J. Cizek Charles University, Prague, Czech Republic W. Hillert University of Hamburg, Institut für Experimentalphysik, Hamburg, Germany
	Positron annihilation measurements allow to study the hydrogen interaction with vacancies in a crystal lattice. Furthermore, the 3/2 ratio of the positronium annihilation can be used to identify local magnetic impurities in thin layers. Dynamic studies of these properties in annealing studies up to 300°C will be presented. The discussion is accompanied by X-ray reflectivity studies performed on single crystal samples to study the niobium oxide dissolution. The dynamics of magnetic impurities during a Mid-T bake will be presented, put into the context of cavity studies and a potential link to rf properties will be discussed.
DOI •	reference for this paper ※ doi:10.18429/JACoW-SRF2021-TUOFDV03
About •	Received ※ 23 June 2021 — Revised ※ 12 July 2021 — Accepted ※ 21 August 2021 — Issue date ※ 05 December 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUOFDV03

Vacancy-Hydrogen Dynamics and Magnetic Impurities During Mid-T Bake

cavity, niobium, lattice, interface

342

M. Wenskat, C. Bate, D. Reschke, J. Schaffran, L. Steder, H. Weise
DESY, Hamburg, Germany
C. Bate, G.D.L. Semione, A. Stierle
University of Hamburg, Hamburg, Germany
M. Butterling, E. Hirschmann, M.O. Liedke, A. Wagner
HZDR, Dresden, Germany
J. Cizek
Charles University, Prague, Czech Republic
W. Hillert
University of Hamburg, Institut für Experimentalphysik, Hamburg, Germany

Positron annihilation measurements allow to study the hydrogen interaction with vacancies in a crystal lattice. Furthermore, the 3/2 ratio of the positronium annihilation can be used to identify local magnetic impurities in thin layers. Dynamic studies of these properties in annealing studies up to 300°C will be presented. The discussion is accompanied by X-ray reflectivity studies performed on single crystal samples to study the niobium oxide dissolution. The dynamics of magnetic impurities during a Mid-T bake will be presented, put into the context of cavity studies and a potential link to rf properties will be discussed.

DOI •

reference for this paper ※ doi:10.18429/JACoW-SRF2021-TUOFDV03

About •

Received ※ 23 June 2021 — Revised ※ 12 July 2021 — Accepted ※ 21 August 2021 — Issue date ※ 05 December 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)