IPAC2018 - List of Authors (Bürger, H.)

Paper	Title	Page
WEPMF010	Laser Treatment of Niobium Surface for SRF Aplications	2387
	V. Porshyn, D. Lützenkirchen-Hecht, P. Serbun Bergische Universität Wuppertal, Wuppertal, Germany H. Bürger, S. Soykarci University of Wuppertal, Wuppertal, Germany
	Funding: The research was funded by the German Federal Ministry of Education and Research (BMBF) under project number 05H15PXRB1. We report on a laser surface treatment of high purity niobium (110) single crystals. Typical surface defects like scratches, pits, sharp rims and holes were eliminated by a focused pulsed ns-laser beam. A laser fluence of about 0.68 J/cm² and 40 - 80 pulses per spot were required to induce well detectable surface modifications. The remelted surface was sufficiently smooth, but exhibited also a number of wave structures. Thus, the surface roughness slightly increased with increasing number of pulses. Finally, boiling traces and μm-deep ablation were observed and studied as well. Local field electron emission measurements showed no emission up to 700 MV/m from a moderate remelted area below the boiling point.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPMF010
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Paper

Title

Page

Laser Treatment of Niobium Surface for SRF Aplications

2387

V. Porshyn, D. Lützenkirchen-Hecht, P. Serbun
Bergische Universität Wuppertal, Wuppertal, Germany
H. Bürger, S. Soykarci
University of Wuppertal, Wuppertal, Germany

Funding: The research was funded by the German Federal Ministry of Education and Research (BMBF) under project number 05H15PXRB1.
We report on a laser surface treatment of high purity niobium (110) single crystals. Typical surface defects like scratches, pits, sharp rims and holes were eliminated by a focused pulsed ns-laser beam. A laser fluence of about 0.68 J/cm² and 40 - 80 pulses per spot were required to induce well detectable surface modifications. The remelted surface was sufficiently smooth, but exhibited also a number of wave structures. Thus, the surface roughness slightly increased with increasing number of pulses. Finally, boiling traces and μm-deep ablation were observed and studied as well. Local field electron emission measurements showed no emission up to 700 MV/m from a moderate remelted area below the boiling point.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPMF010

Export •

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