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Title: Method for determining hydrogen mobility as a function of temperature in superconducting niobium cavities

Abstract

A method for determining the mobility of hydrogen as a function of temperature in superconducting niobium cavities comprising: 1) heating a cavity under test to remove free hydrogen; 2) introducing hydrogen-3 gas into the cavity; 3) cooling the cavity to allow absorption of hydrogen-3; and 4) measuring the amount of hydrogen-3 by: a) cooling the cavity to about 4.degree. K while flowing a known and regulated amount of inert carrier gas such as argon or helium into the cavity; b) allowing the cavity to warm at a stable rate from 4.degree. K to room temperature as it leaves the chamber; and c) directing the exit gas to an ion chamber radiation detector.

Inventors:
 [1]
  1. Virginia Beach, VA
Issue Date:
Research Org.:
Jefferson Science Associates LLC (Newport News, VA)
Sponsoring Org.:
USDOE
OSTI Identifier:
970538
Patent Number(s):
7340937
Application Number:
11/270,714
Assignee:
Jefferson Science Associates LLC (Newport News, VA)
Patent Classifications (CPCs):
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
AC05-84ER 40150
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN

Citation Formats

May, Robert. Method for determining hydrogen mobility as a function of temperature in superconducting niobium cavities. United States: N. p., 2008. Web.
May, Robert. Method for determining hydrogen mobility as a function of temperature in superconducting niobium cavities. United States.
May, Robert. Tue . "Method for determining hydrogen mobility as a function of temperature in superconducting niobium cavities". United States. https://www.osti.gov/servlets/purl/970538.
@article{osti_970538,
title = {Method for determining hydrogen mobility as a function of temperature in superconducting niobium cavities},
author = {May, Robert},
abstractNote = {A method for determining the mobility of hydrogen as a function of temperature in superconducting niobium cavities comprising: 1) heating a cavity under test to remove free hydrogen; 2) introducing hydrogen-3 gas into the cavity; 3) cooling the cavity to allow absorption of hydrogen-3; and 4) measuring the amount of hydrogen-3 by: a) cooling the cavity to about 4.degree. K while flowing a known and regulated amount of inert carrier gas such as argon or helium into the cavity; b) allowing the cavity to warm at a stable rate from 4.degree. K to room temperature as it leaves the chamber; and c) directing the exit gas to an ion chamber radiation detector.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {3}
}

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Works referenced in this record:

Investigations on hydrogen contamination of superconducting cavities
conference, January 1991


The “Q disease” in Superconducting Niobium RF Cavities
conference, January 2003

  • Knobloch, J.
  • HYDROGEN IN MATERIALS & VACUUM SYSTEMS: First International Workshop on Hydrogen in Materials and Vacuum Systems, AIP Conference Proceedings
  • https://doi.org/10.1063/1.1597364