Laser polishing of niobium for SRF applications
Abstract
Smooth interior surfaces are desired for niobium SRF cavities, now obtained by buffered chemical polish (BCP) and/or electropolish (EP). Laser polishing is a potential alternative, having advantages of speed, freedom from chemistry and in-process inspection. Here we show that laser polishing can produce smooth topography with Power Spectral Density (PSD) measurements similar to that obtained by EP. We studied the influence of the laser power density and laser beam raster rate on the surface topography. These two factors need to be combined carefully to smooth the surface without damaging it. Computational modeling was used to simulate the surface temperature and explain the mechanism of laser polishing.
- Authors:
-
- JLAB
- W&M
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1164416
- Report Number(s):
- JLAB-ACC-13-1798; DOE/OR/23177-2771
- DOE Contract Number:
- AC05-06OR23177
- Resource Type:
- Conference
- Resource Relation:
- Conference: SRF 2013, 23-27 Sept 2013. Paris, France
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Zhao, Liang, Klopf, J. Michael, Reece, Charles E., and Kelley, Michael. Laser polishing of niobium for SRF applications. United States: N. p., 2013.
Web.
Zhao, Liang, Klopf, J. Michael, Reece, Charles E., & Kelley, Michael. Laser polishing of niobium for SRF applications. United States.
Zhao, Liang, Klopf, J. Michael, Reece, Charles E., and Kelley, Michael. 2013.
"Laser polishing of niobium for SRF applications". United States. https://www.osti.gov/servlets/purl/1164416.
@article{osti_1164416,
title = {Laser polishing of niobium for SRF applications},
author = {Zhao, Liang and Klopf, J. Michael and Reece, Charles E. and Kelley, Michael},
abstractNote = {Smooth interior surfaces are desired for niobium SRF cavities, now obtained by buffered chemical polish (BCP) and/or electropolish (EP). Laser polishing is a potential alternative, having advantages of speed, freedom from chemistry and in-process inspection. Here we show that laser polishing can produce smooth topography with Power Spectral Density (PSD) measurements similar to that obtained by EP. We studied the influence of the laser power density and laser beam raster rate on the surface topography. These two factors need to be combined carefully to smooth the surface without damaging it. Computational modeling was used to simulate the surface temperature and explain the mechanism of laser polishing.},
doi = {},
url = {https://www.osti.gov/biblio/1164416},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Sep 01 00:00:00 EDT 2013},
month = {Sun Sep 01 00:00:00 EDT 2013}
}
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