Characterization of ingot material for SRF cavity production
Conference
·
OSTI ID:1115735
- BARC, Mumbai
- JLAB
- BARC-EBC, Mumbai
In recent years, large-grain/single-crystal niobium has become a viable alternative to the standard fine grain (ASTM grain size>6), high purity (RRR ) niobium for the fabrication of high-performance SRF cavities for particle accelerators. In this contribution we present the results of a systematic study of the superconducting properties of samples obtained from four Niobium ingots (from CBMM, Brazil) of different purity. Measurements of bulk magnetization, surface pinning, critical temperature and thermal conductivity have been carried out on the samples subjected to different surface treatments such as buffered chemical polishing (BCP), 6000C heat treatment, and low temperature baking (LTB). A correlation has been established between the LTB and the ratio . In addition, the phonon peak in the thermal conductivity data is suppressed by the presence of trapped magnetic vortices in the samples.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1115735
- Report Number(s):
- JLAB-ACC-09-990; DOE/OR/23177-1003
- Country of Publication:
- United States
- Language:
- English
Similar Records
Superconducting DC and RF properties of ingot Niobium used in SRF cavity fabrication
Ingot Niobium Summary
Origins of quench in buffered chemical polished and low temperature baked SRF cavities
Conference
·
Sat Dec 31 23:00:00 EST 2011
·
OSTI ID:1996013
Ingot Niobium Summary
Program Document
·
Wed Jan 13 23:00:00 EST 2016
·
OSTI ID:1329449
Origins of quench in buffered chemical polished and low temperature baked SRF cavities
Conference
·
Tue Sep 26 00:00:00 EDT 2023
· JACoW
·
OSTI ID:2479598