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Radiofrequency attenuator and method

United States Patent Application

20040149472
A1
View the Complete Application at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Radiofrequency attenuator and method. The attenuator includes a pair of transparent windows. A chamber between the windows is filled with molten salt. Preferred molten salts include quarternary ammonium cations and fluorine-containing anions such as tetrafluoroborate (BF.sub.4.sup.-), hexafluorophosphate (PF.sub.6.sup.-), hexafluoroarsenate (AsF.sub.6.sup.-), trifluoromethylsulfonate (CF.sub.3SO.sub.3.sup.-), bis(trifluoromethylsulfonyl)imide ((CF.sub.3SO.sub.2).sub.2N.sup.-), bis(perfluoroethylsulfonyl)imide ((CF.sub.3CF.sub.2SO.sub.2).sub.2N.sup.-- ) and tris(trifluoromethylsulfonyl)methide ((CF.sub.3SO.sub.2).sub.3C.sup.- -). Radicals or radical cations may be added to or electrochemically generated in the molten salt to enhance the RF attenuation.
Warner, Benjamin P. (Los Alamos, NM), McCleskey, T. Mark (Los Alamos, NM), Burrell, Anthony K. (Los Alamos, NM), Agrawal, Anoop (Tucson, AZ), Hall, Simon B. (Palmerston North, NZ)
10/ 357,723
February 3, 2003
[0001] This invention was made with government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy. The government has certain rights in the invention.