Ultra-high quality factors in superconducting niobium cavities in ambient magnetic fields up to 190 mG

Romanenko, A.; Grassellino, A.; Crawford, A. C.; Sergatskov, D. A.; Melnychuk, O.

doi:10.1063/1.4903808

Title: Ultra-high quality factors in superconducting niobium cavities in ambient magnetic fields up to 190 mG

Abstract

Ambient magnetic field, if trapped in the penetration depth, leads to the residual resistance and therefore sets the limit for the achievable quality factors in superconducting niobium resonators for particle accelerators. Here, we show that a complete expulsion of the magnetic flux can be performed and leads to: (1) record quality factors Q > 2 x 10¹¹ up to accelerating gradient of 22 MV/m; (2) Q ~ 3 x 10¹⁰ at 2 K and 16 MV/m in up to 190 mG magnetic fields. This is achieved by large thermal gradients at the normal/superconducting phase front during the cooldown. Our findings open up a way to ultra-high quality factors at low temperatures and show an alternative to the sophisticated magnetic shielding implemented in modern superconducting accelerators.

Authors:

Romanenko, A.; Grassellino, A.;

; Sergatskov, D. A.; Melnychuk, O.

Publication Date:: Mon Dec 08 00:00:00 EST 2014

Research Org.:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1179637

Alternate Identifier(s):: OSTI ID: 1214092; OSTI ID: 1420683

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Published Article

Journal Name:: Applied Physics Letters

Additional Journal Information:: Journal Name: Applied Physics Letters Journal Volume: 105 Journal Issue: 23; Journal ID: ISSN 0003-6951

Publisher:: American Institute of Physics

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; magnetic fields; magnetic field measurements; magnetic shielding; niobium; acceleration measurement

Citation Formats


                    Romanenko, A., Grassellino, A., Crawford, A. C., Sergatskov, D. A., and Melnychuk, O. Ultra-high quality factors in superconducting niobium cavities in ambient magnetic fields up to 190 mG.  United States: N. p., 2014. 
Web.  doi:10.1063/1.4903808.

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                    Romanenko, A., Grassellino, A., Crawford, A. C., Sergatskov, D. A., & Melnychuk, O. Ultra-high quality factors in superconducting niobium cavities in ambient magnetic fields up to 190 mG.  United States.  https://doi.org/10.1063/1.4903808

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                    Romanenko, A., Grassellino, A., Crawford, A. C., Sergatskov, D. A., and Melnychuk, O. Mon .  
"Ultra-high quality factors in superconducting niobium cavities in ambient magnetic fields up to 190 mG".  United States.  https://doi.org/10.1063/1.4903808.

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@article{osti_1179637,

  title        = {Ultra-high quality factors in superconducting niobium cavities in ambient magnetic fields up to 190 mG},

  author       = {Romanenko, A. and Grassellino, A. and Crawford, A. C. and Sergatskov, D. A. and Melnychuk, O.},

  abstractNote = {Ambient magnetic field, if trapped in the penetration depth, leads to the residual resistance and therefore sets the limit for the achievable quality factors in superconducting niobium resonators for particle accelerators. Here, we show that a complete expulsion of the magnetic flux can be performed and leads to: (1) record quality factors Q > 2 x 10¹¹ up to accelerating gradient of 22 MV/m; (2) Q ~ 3 x 10¹⁰ at 2 K and 16 MV/m in up to 190 mG magnetic fields. This is achieved by large thermal gradients at the normal/superconducting phase front during the cooldown. Our findings open up a way to ultra-high quality factors at low temperatures and show an alternative to the sophisticated magnetic shielding implemented in modern superconducting accelerators.},

  doi          = {10.1063/1.4903808},

  journal      = {Applied Physics Letters},

  number       = 23,

  volume       = 105,

  place        = {United States},

  year         = {Mon Dec 08 00:00:00 EST 2014},

  month        = {Mon Dec 08 00:00:00 EST 2014}

}

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Works referenced in this record:

Theory of the Anomalous Skin Effect in Normal and Superconducting Metals
journal, July 1958

Mattis, D. C.; Bardeen, J.
Physical Review, Vol. 111, Issue 2
DOI: 10.1103/PhysRev.111.412

Impact of cool-down conditions at $T_{c}$ on the superconducting rf cavity quality factor
journal, October 2013

Vogt, J. -M.; Kugeler, O.; Knobloch, J.
Physical Review Special Topics - Accelerators and Beams, Vol. 16, Issue 10
DOI: 10.1103/PhysRevSTAB.16.102002

Dependence of the residual surface resistance of superconducting radio frequency cavities on the cooling dynamics around T _c
journal, May 2014

Romanenko, A.; Grassellino, A.; Melnychuk, O.
Journal of Applied Physics, Vol. 115, Issue 18
DOI: 10.1063/1.4875655

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

Grassellino, A.; Romanenko, A.; Sergatskov, D.
Superconductor Science and Technology, Vol. 26, Issue 10
DOI: 10.1088/0953-2048/26/10/102001

Nernst Effect and Flux Flow in Superconductors. I. Niobium
journal, May 1969

Huebener, R. P.; Seher, A.
Physical Review, Vol. 181, Issue 2
DOI: 10.1103/PhysRev.181.701

Strong Meissner screening change in superconducting radio frequency cavities due to mild baking
journal, February 2014

Romanenko, A.; Grassellino, A.; Barkov, F.
Applied Physics Letters, Vol. 104, Issue 7
DOI: 10.1063/1.4866013

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Similar Records

Title: Ultra-high quality factors in superconducting niobium cavities in ambient magnetic fields up to 190 mG

Abstract

Citation Formats

Theory of the Anomalous Skin Effect in Normal and Superconducting Metals journal, July 1958

Impact of cool-down conditions at T c on the superconducting rf cavity quality factor journal, October 2013

Dependence of the residual surface resistance of superconducting radio frequency cavities on the cooling dynamics around T c journal, May 2014

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

Nernst Effect and Flux Flow in Superconductors. I. Niobium journal, May 1969

Strong Meissner screening change in superconducting radio frequency cavities due to mild baking journal, February 2014

Theory of the Anomalous Skin Effect in Normal and Superconducting Metals
journal, July 1958

Impact of cool-down conditions at $T_{c}$ on the superconducting rf cavity quality factor
journal, October 2013

Dependence of the residual surface resistance of superconducting radio frequency cavities on the cooling dynamics around T _c
journal, May 2014

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

Nernst Effect and Flux Flow in Superconductors. I. Niobium
journal, May 1969

Strong Meissner screening change in superconducting radio frequency cavities due to mild baking
journal, February 2014