skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Superconducting radio-frequency cavities made from medium and low-purity niobium ingots

Abstract

Superconducting radio-frequency cavities made of ingot niobium with residual resistivity ratio (RRR) greater than 250 have proven to have similar or better performance than fine-grain Nb cavities of the same purity, after standard processing. The high purity requirement contributes to the high cost of the material. As superconducting accelerators operating in continuous-wave typically require cavities to operate at moderate accelerating gradients, using lower purity material could be advantageous not only to reduce cost but also to achieve higher Q0-values. In this contribution we present the results from cryogenic RF tests of 1.3–1.5 GHz single-cell cavities made of ingot Nb of medium (RRR = 100–150) and low (RRR = 60) purity from different suppliers. Cavities made of medium-purity ingots routinely achieved peak surface magnetic field values greater than 70 mT with an average Q0-value of 2 × 1010 at 2 K after standard processing treatments. As a result, the performances of cavities made of low-purity ingots were affected by significant pitting of the surface after chemical etching.

Authors:
 [1];  [1];  [1]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1256296
Alternate Identifier(s):
OSTI ID: 1246474
Report Number(s):
JLAB-ACC-16-2244; DOE/OR/23177-3812
Journal ID: ISSN 0953-2048
Grant/Contract Number:  
AC05-06OR23177; CRADA JSA 2004S002
Resource Type:
Accepted Manuscript
Journal Name:
Superconductor Science and Technology
Additional Journal Information:
Journal Volume: 29; Journal Issue: 6; Journal ID: ISSN 0953-2048
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; niobium; superconducting cavities; radio-frequency devices

Citation Formats

Ciovati, Gianluigi, Dhakal, Pashupati, and Myneni, Ganapati R. Superconducting radio-frequency cavities made from medium and low-purity niobium ingots. United States: N. p., 2016. Web. https://doi.org/10.1088/0953-2048/29/6/064002.
Ciovati, Gianluigi, Dhakal, Pashupati, & Myneni, Ganapati R. Superconducting radio-frequency cavities made from medium and low-purity niobium ingots. United States. https://doi.org/10.1088/0953-2048/29/6/064002
Ciovati, Gianluigi, Dhakal, Pashupati, and Myneni, Ganapati R. Thu . "Superconducting radio-frequency cavities made from medium and low-purity niobium ingots". United States. https://doi.org/10.1088/0953-2048/29/6/064002. https://www.osti.gov/servlets/purl/1256296.
@article{osti_1256296,
title = {Superconducting radio-frequency cavities made from medium and low-purity niobium ingots},
author = {Ciovati, Gianluigi and Dhakal, Pashupati and Myneni, Ganapati R.},
abstractNote = {Superconducting radio-frequency cavities made of ingot niobium with residual resistivity ratio (RRR) greater than 250 have proven to have similar or better performance than fine-grain Nb cavities of the same purity, after standard processing. The high purity requirement contributes to the high cost of the material. As superconducting accelerators operating in continuous-wave typically require cavities to operate at moderate accelerating gradients, using lower purity material could be advantageous not only to reduce cost but also to achieve higher Q0-values. In this contribution we present the results from cryogenic RF tests of 1.3–1.5 GHz single-cell cavities made of ingot Nb of medium (RRR = 100–150) and low (RRR = 60) purity from different suppliers. Cavities made of medium-purity ingots routinely achieved peak surface magnetic field values greater than 70 mT with an average Q0-value of 2 × 1010 at 2 K after standard processing treatments. As a result, the performances of cavities made of low-purity ingots were affected by significant pitting of the surface after chemical etching.},
doi = {10.1088/0953-2048/29/6/064002},
journal = {Superconductor Science and Technology},
number = 6,
volume = 29,
place = {United States},
year = {2016},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Nitrogen and argon doping of niobium for superconducting radio frequency cavities: a pathway to highly efficient accelerating structures
journal, August 2013


Characterization of etch pits found on a large-grain bulk niobium superconducting radio-frequency resonant cavity
journal, December 2010

  • Zhao, Xin; Ciovati, G.; Bieler, T. R.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 13, Issue 12
  • DOI: 10.1103/physrevstab.13.124701

Effect of high temperature heat treatments on the quality factor of a large-grain superconducting radio-frequency niobium cavity
journal, April 2013

  • Dhakal, P.; Ciovati, G.; Myneni, G. R.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 16, Issue 4
  • DOI: 10.1103/physrevstab.16.042001

Superconducting TESLA cavities
journal, September 2000

  • Aune, B.; Bandelmann, R.; Bloess, D.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 3, Issue 9
  • DOI: 10.1103/physrevstab.3.092001

Mechanical properties of niobium radio-frequency cavities
journal, August 2015


Summary of performance of superconducting radio-frequency cavities built from CBMM niobium ingots
conference, January 2015

  • Ciovati, Gianluigi; Dhakal, Pashupati; Kneisel, Peter
  • SCIENCE AND TECHNOLOGY OF INGOT NIOBIUM FOR SUPERCONDUCTING RADIO FREQUENCY APPLICATIONS, AIP Conference Proceedings
  • DOI: 10.1063/1.4935322

America’s Overview of Superconducting Science and Technology of Ingot Niobium
conference, January 2011

  • Ciovati, Gianluigi; Kneisel, Peter; Myneni, Ganapati R.
  • FIRST INTERNATIONAL SYMPOSIUM ON THE SUPERCONDUCTING SCIENCE AND TECHNOLOGY OF INGOT NIOBIUM, AIP Conference Proceedings
  • DOI: 10.1063/1.3579221

Development of Superconducting Cavities of Cylindrical Symmetry at Cornell
journal, August 1983

  • Kneisel, P.; Nakajima, K.; Kirchgessner, J.
  • IEEE Transactions on Nuclear Science, Vol. 30, Issue 4
  • DOI: 10.1109/tns.1983.4336653

Production of high thermal conductivity niobium on a technical scale for high-frequency superconductivity
journal, April 1988


Response of an oscillating superleak transducer to a pointlike heat source
journal, March 2012

  • Quadt, A.; Schröder, B.; Uhrmacher, M.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 15, Issue 3
  • DOI: 10.1103/physrevstab.15.031001

Effect of mild baking on superconducting niobium cavities investigated by sequential nanoremoval
journal, January 2013

  • Romanenko, A.; Grassellino, A.; Barkov, F.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 16, Issue 1
  • DOI: 10.1103/physrevstab.16.012001

Design of a high speed, high resolution thermometry system for 1.5 GHz superconducting radio frequency cavities
journal, November 1994

  • Knobloch, Jens; Muller, Henry; Padamsee, Hasan
  • Review of Scientific Instruments, Vol. 65, Issue 11
  • DOI: 10.1063/1.1144532

Development of large grain cavities
journal, January 2013

  • Singer, W.; Aderhold, S.; Ermakov, A.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 16, Issue 1
  • DOI: 10.1103/physrevstab.16.012003

Detection of surface carbon and hydrocarbons in hot spot regions of niobium superconducting rf cavities by Raman spectroscopy
journal, June 2013


Superconducting RF for energy-recovery linacs
journal, February 2006

  • Liepe, M.; Knobloch, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 557, Issue 1
  • DOI: 10.1016/j.nima.2005.10.099

Trapped magnetic flux in superconducting niobium samples
journal, June 2012

  • Aull, S.; Kugeler, O.; Knobloch, J.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 15, Issue 6
  • DOI: 10.1103/physrevstab.15.062001

Flux pinning characteristics in cylindrical niobium samples used for superconducting radio frequency cavity fabrication
journal, April 2012

  • Dhavale, Asavari S.; Dhakal, Pashupati; Polyanskii, Anatolii A.
  • Superconductor Science and Technology, Vol. 25, Issue 6
  • DOI: 10.1088/0953-2048/25/6/065014

Review of ingot niobium as a material for superconducting radiofrequency accelerating cavities
journal, February 2015

  • Kneisel, P.; Ciovati, G.; Dhakal, P.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 774
  • DOI: 10.1016/j.nima.2014.11.083

Enhancement in Quality Factor of SRF Niobium Cavities by Material Diffusion
journal, June 2015

  • Dhakal, Pashupati; Ciovati, Gianluigi; Kneisel, Peter
  • IEEE Transactions on Applied Superconductivity, Vol. 25, Issue 3
  • DOI: 10.1109/tasc.2014.2359640

Quality requirements and control of high purity niobium for superconducting RF cavities
journal, April 2003


Development of high resolution camera for observations of superconducting cavities
journal, September 2008

  • Iwashita, Yoshihisa; Tajima, Yujiro; Hayano, Hitoshi
  • Physical Review Special Topics - Accelerators and Beams, Vol. 11, Issue 9
  • DOI: 10.1103/physrevstab.11.093501

Development of large grain cavities
journal, January 2013

  • Singer, W.; Aderhold, S.; Ermakov, A.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 16, Issue 1
  • DOI: 10.1103/PhysRevSTAB.16.012003

Quality requirements and control of high purity niobium for superconducting RF cavities
journal, April 2003


Effect of high temperature heat treatments on the quality factor of a large-grain superconducting radio-frequency niobium cavity
journal, April 2013

  • Dhakal, P.; Ciovati, G.; Myneni, G. R.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 16, Issue 4
  • DOI: 10.1103/PhysRevSTAB.16.042001

Superconducting TESLA cavities
journal, September 2000

  • Aune, B.; Bandelmann, R.; Bloess, D.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 3, Issue 9
  • DOI: 10.1103/PhysRevSTAB.3.092001

Development of Superconducting Cavities of Cylindrical Symmetry at Cornell
journal, August 1983

  • Kneisel, P.; Nakajima, K.; Kirchgessner, J.
  • IEEE Transactions on Nuclear Science, Vol. 30, Issue 4
  • DOI: 10.1109/TNS.1983.4336653

Response of an oscillating superleak transducer to a pointlike heat source
journal, March 2012

  • Quadt, A.; Schröder, B.; Uhrmacher, M.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 15, Issue 3
  • DOI: 10.1103/PhysRevSTAB.15.031001

Development of high resolution camera for observations of superconducting cavities
journal, September 2008

  • Iwashita, Yoshihisa; Tajima, Yujiro; Hayano, Hitoshi
  • Physical Review Special Topics - Accelerators and Beams, Vol. 11, Issue 9
  • DOI: 10.1103/PhysRevSTAB.11.093501

Characterization of etch pits found on a large-grain bulk niobium superconducting radio-frequency resonant cavity
journal, December 2010

  • Zhao, Xin; Ciovati, G.; Bieler, T. R.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 13, Issue 12
  • DOI: 10.1103/PhysRevSTAB.13.124701

Detection of surface carbon and hydrocarbons in hot spot regions of niobium superconducting rf cavities by Raman spectroscopy
journal, June 2013


Trapped magnetic flux in superconducting niobium samples
journal, June 2012

  • Aull, S.; Kugeler, O.; Knobloch, J.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 15, Issue 6
  • DOI: 10.1103/PhysRevSTAB.15.062001

Effect of mild baking on superconducting niobium cavities investigated by sequential nanoremoval
journal, January 2013

  • Romanenko, A.; Grassellino, A.; Barkov, F.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 16, Issue 1
  • DOI: 10.1103/PhysRevSTAB.16.012001

Enhancement in Quality Factor of SRF Niobium Cavities by Material Diffusion
journal, June 2015

  • Dhakal, Pashupati; Ciovati, Gianluigi; Kneisel, Peter
  • IEEE Transactions on Applied Superconductivity, Vol. 25, Issue 3
  • DOI: 10.1109/TASC.2014.2359640

    Works referencing / citing this record:

    Theory of RF superconductivity for resonant cavities
    journal, January 2017


    Field-dependent nonlinear surface resistance and its optimization by surface nanostructuring in superconductors
    journal, August 2019


    Nonlinear dynamics and dissipation of a curvilinear vortex driven by a strong time-dependent Meissner current
    journal, February 2020