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Title: Review of ingot niobium as a material for superconducting radiofrequency accelerating cavities

Abstract

As a result of collaboration between Jefferson Lab and niobium manufacturer Companhia Brasileira de Metalurgia e Mineração (CBMM), ingot niobium was explored as a possible material for superconducting radiofrequency (SRF) cavity fabrication. The first single cell cavity from large-grain high purity niobium was fabricated and successfully tested at Jefferson Lab in 2004. This work triggered research activities in other SRF laboratories around the world. The large-grain (LG) niobium became not only an interesting alternative material for cavity builders, but also material scientists and surface scientists were eager to participate in the development of this technology. Many single cell cavities made from material of different suppliers have been tested successfully and several multi-cell cavities have shown performances comparable to the best cavities made from standard fine-grain niobium. Several 9-cell cavities fabricated by Research Instruments and tested at DESY exceeded the best performing fine grain cavities with a record accelerating gradient of Eacc=45.6 MV/m. The quality factor of those cavities was also higher than that of fine-grain (FG) cavities processed with the same methods. Such performance levels push the state-of-the art of SRF technology and are of great interest for future accelerators. This contribution reviews the development of ingot niobium technology andmore » highlights some of the differences compared to standard FG material and opportunities for further developments.« less

Authors:
 [1];  [1];  [1];  [2];  [3];  [3];  [1]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1165555
Report Number(s):
JLAB-ACC-14-1913; DOE/OR/23177-3250
Journal ID: ISSN 0168-9002
Grant/Contract Number:  
AC05-06OR23177
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 774; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SRF cavities; ingot niobium

Citation Formats

Kneisel, P., Ciovati, G., Dhakal, P., Saito, K., Singer, W., Singer, X., and Myneni, G. R. Review of ingot niobium as a material for superconducting radiofrequency accelerating cavities. United States: N. p., 2014. Web. doi:10.1016/j.nima.2014.11.083.
Kneisel, P., Ciovati, G., Dhakal, P., Saito, K., Singer, W., Singer, X., & Myneni, G. R. Review of ingot niobium as a material for superconducting radiofrequency accelerating cavities. United States. https://doi.org/10.1016/j.nima.2014.11.083
Kneisel, P., Ciovati, G., Dhakal, P., Saito, K., Singer, W., Singer, X., and Myneni, G. R. Mon . "Review of ingot niobium as a material for superconducting radiofrequency accelerating cavities". United States. https://doi.org/10.1016/j.nima.2014.11.083. https://www.osti.gov/servlets/purl/1165555.
@article{osti_1165555,
title = {Review of ingot niobium as a material for superconducting radiofrequency accelerating cavities},
author = {Kneisel, P. and Ciovati, G. and Dhakal, P. and Saito, K. and Singer, W. and Singer, X. and Myneni, G. R.},
abstractNote = {As a result of collaboration between Jefferson Lab and niobium manufacturer Companhia Brasileira de Metalurgia e Mineração (CBMM), ingot niobium was explored as a possible material for superconducting radiofrequency (SRF) cavity fabrication. The first single cell cavity from large-grain high purity niobium was fabricated and successfully tested at Jefferson Lab in 2004. This work triggered research activities in other SRF laboratories around the world. The large-grain (LG) niobium became not only an interesting alternative material for cavity builders, but also material scientists and surface scientists were eager to participate in the development of this technology. Many single cell cavities made from material of different suppliers have been tested successfully and several multi-cell cavities have shown performances comparable to the best cavities made from standard fine-grain niobium. Several 9-cell cavities fabricated by Research Instruments and tested at DESY exceeded the best performing fine grain cavities with a record accelerating gradient of Eacc=45.6 MV/m. The quality factor of those cavities was also higher than that of fine-grain (FG) cavities processed with the same methods. Such performance levels push the state-of-the art of SRF technology and are of great interest for future accelerators. This contribution reviews the development of ingot niobium technology and highlights some of the differences compared to standard FG material and opportunities for further developments.},
doi = {10.1016/j.nima.2014.11.083},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 774,
place = {United States},
year = {Mon Dec 01 00:00:00 EST 2014},
month = {Mon Dec 01 00:00:00 EST 2014}
}

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Works referencing / citing this record:

Surface processing for bulk niobium superconducting radio frequency cavities
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Evidence for preferential flux flow at the grain boundaries of superconducting RF-quality niobium
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