Apparatus and process for passivating an SRF cavity

Myneni, Ganapati Rao; Wallace, John P

Title: Apparatus and process for passivating an SRF cavity

Abstract

An apparatus and process for the production of a niobium cavity exhibiting high quality factors at high gradients is provided. The apparatus comprises a first chamber positioned within a second chamber, an RF generator and vacuum pumping systems. The process comprises placing the niobium cavity in a first chamber of the apparatus; thermally treating the cavity by high temperature in the first chamber while maintaining high vacuum in the first and second chambers; and applying a passivating thin film layer to a surface of the cavity in the presence of a gaseous mixture and an RF field. Further a niobium cavity exhibiting high quality factors at high gradients produced by the method of the invention is provided.

Inventors:: Myneni, Ganapati Rao; Wallace, John P

Issue Date:: 2014-12-02

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1164667

Patent Number(s):: 8903464

Application Number:: 12/925,503

Assignee:: Jefferson Science Associates, LLC (Newport News, VA)

Patent Classifications (CPCs):: H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05H - PLASMA TECHNIQUE

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

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H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05H - PLASMA TECHNIQUE
H05H7/20 - with superconductive walls

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T29/49014 - Superconductor

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DOE Contract Number:: AC05-06OR23177

Resource Type:: Patent

Resource Relation:: Patent File Date: 2010 Oct 23

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; 36 MATERIALS SCIENCE

Citation Formats


                    Myneni, Ganapati Rao, and Wallace, John P. Apparatus and process for passivating an SRF cavity.  United States: N. p., 2014. 
        Web.

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                    Myneni, Ganapati Rao, & Wallace, John P. Apparatus and process for passivating an SRF cavity.  United States.

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                    Myneni, Ganapati Rao, and Wallace, John P. Tue .  
        "Apparatus and process for passivating an SRF cavity".  United States.  https://www.osti.gov/servlets/purl/1164667.

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@article{osti_1164667,

  title        = {Apparatus and process for passivating an SRF cavity},

  author       = {Myneni, Ganapati Rao and Wallace, John P},

  abstractNote = {An apparatus and process for the production of a niobium cavity exhibiting high quality factors at high gradients is provided. The apparatus comprises a first chamber positioned within a second chamber, an RF generator and vacuum pumping systems. The process comprises placing the niobium cavity in a first chamber of the apparatus; thermally treating the cavity by high temperature in the first chamber while maintaining high vacuum in the first and second chambers; and applying a passivating thin film layer to a surface of the cavity in the presence of a gaseous mixture and an RF field. Further a niobium cavity exhibiting high quality factors at high gradients produced by the method of the invention is provided.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2014},

  month        = {12}

}

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Works referenced in this record:

Process for the manufacture of NbN superconducting cavity resonators
patent, August 1989

Halbritter, Jürgen; Baumgärtner, Hartmut
US Patent Document 4,857,360
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4857360

Superconducting accelerating tube and a method for manufacturing the same
patent, August 1993

Sakano, Misao; Mukoyama, Shinichi; Shimano, Takeshi
US Patent Document 5,239,157
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5239157

Passivated niobium cavities
patent, December 2006

Myneni, Ganapati Rao; Hjörvarsson, Björgvin; Ciovati, Gianluigi
US Patent Document 7,151,347
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7151347

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Title: Apparatus and process for passivating an SRF cavity

Abstract

Citation Formats

Process for the manufacture of NbN superconducting cavity resonators patent, August 1989

Superconducting accelerating tube and a method for manufacturing the same patent, August 1993

Passivated niobium cavities patent, December 2006

Process for the manufacture of NbN superconducting cavity resonators
patent, August 1989

Superconducting accelerating tube and a method for manufacturing the same
patent, August 1993

Passivated niobium cavities
patent, December 2006