Laser polishing for topography management of accelerator cavity surfaces

Journal Article · Mon Jul 20 00:00:00 EDT 2015 · Materialwissenschaft und Werkstofftechnik

DOI:https://doi.org/10.1002/mawe.201500323· OSTI ID:1211537

Zhao, Liang ^[1]; Klopf, J. Mike ^[2]; Reece, Charles E. ^[3]; Kelley, Michael J. ^[1]

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1. College of William and Mary, Williamsburg, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
2. College of William and Mary, Williamsburg, VA (United States)
3. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Improved energy efficiency and reduced cost are greatly desired for advanced particle accelerators. Progress toward both can be made by atomically-smoothing the interior surface of the niobium superconducting radiofrequency accelerator cavities at the machine's heart. Laser polishing offers a green alternative to the present aggressive chemical processes. We found parameters suitable for polishing niobium in all surface states expected for cavity production. As a result, careful measurement of the resulting surface chemistry revealed a modest thinning of the surface oxide layer, but no contamination.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1211537
• Report Number(s): JLAB-FEL-14-1878; DOE/OR/23177-3757; SC0007907
• Journal Information: Materialwissenschaft und Werkstofftechnik, Vol. 46, Issue 7; ISSN 0933-5137
• Country of Publication: United States
• Language: English

Related Subjects

laser polishing
topograpy
cavity surfaces