Skip to Content
Find More Like This
Return to Search

Miniature quadrupole mass spectrometer having a cold cathode ionization source

United States Patent

September 17, 2002
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
Miniaturized Mass Spectrometer
An improved quadrupole mass spectrometer is described. The improvement lies in the substitution of the conventional hot filament electron source with a cold cathode field emitter array which in turn allows operating a small QMS at much high internal pressures then are currently achievable. By eliminating of the hot filament such problems as thermally "cracking" delicate analyte molecules, outgassing a "hot" filament, high power requirements, filament contamination by outgas species, and spurious em fields are avoid all together. In addition, the ability of produce FEAs using well-known and well developed photolithographic techniques, permits building a QMS having multiple redundancies of the ionization source at very low additional cost.
Felter; Thomas E. (Livermore, CA)
Sandia National Laboratories (Livermore, CA)
09/ 315,001
May 19, 1999
STATEMENT OF GOVERNMENT INTEREST This invention was made with Government support under contract DE-AC04-94AL85000 awarded by the U.S. Department of Energy to Sandia Corporation. The Government has certain rights in this invention.