Detailed surface analysis of incremental Centrifugal Barrel Polishing (CBP) and EP of single-crystal niobium samples.
Detailed surface analysis of incremental Centrifugal Barrel Polishing (CBP) and EP of single-crystal niobium samples. Ari Palczewski, Hui Tian, Olga Trofimova, Charles Reece Jefferson Lab, Newport News, VA 23606 We performed Centrifugal Barrel Polishing (CBP) on single crystal niobium samples housed in a stainless steel sample holder following a polishing recipe recently developed at FNAL [1]. We were able to obtain a mirror-like finish after the final stage of tumbling, although some defects and imbedded particles remain. Our presentation will discuss the initial results from the coupon study, including qualitative and quantitative analysis of the surface characteristics from each step in the CBP process, followed by HPR and well controlled incremental EP. These will include surface roughness, size and character of contaminants, surface crystal structure, and overall finish. We will discuss how the surface characteristics should guide the SRF community in exploiting or adapting the Fermi recipe; including why minimal subsequent EP is needed, and possible places for modification of the recipe to reduce polishing time. This work is authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177. [1]CA Cooper, LD Cooley , ?Mirror Smooth Superconducting RF Cavities by Mechanical Polishing with Minimal Acid Use,? http://lss.fnal.gov/archive/2011/pub/fermilab-pub-11-032-td.pdf, (May 31, 2011)
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1994857
- Report Number(s):
- JLAB-ACC-11-1536; DOE/OR/23177-6957
- Resource Relation:
- Conference: SRF 2011, Chicago, IL USA, July 21, 2011
- Country of Publication:
- United States
- Language:
- English
Similar Records
Detailed Surface Analysis Of Incremental Centrifugal Barrel Polishing (CBP) Of Single-Crystal Niobium Samples
Development of SIMS Standards for Measurement of H, C, O, N in Nb