Spacecraft mass spectrometer ion source employing field emission cathodes

Details Spacecraft mass spectrometer ion source employing field emission cathodes Spacecraft mass spectrometer ion source employing field emission cathodes

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986rsci...57..989c&link_type=abstract

Review of Scientific Instruments (ISSN 0034-6748), vol. 57, May 1986, p. 989, 990.

Computer Science

10

Cathodes, Field Emission, Ion Sources, Mass Spectrometers, Satellite-Borne Instruments, Anodes, Electron Beams

Scientific paper

An ion source that utilizes a pair of thin-film field emission cathodes to provide current for electric impact ionization is studied. The field emission cathodes are composed of microscopically small needle tips and an extraction electrode; the cathodes generate a 200-eV, 0.1-mA electron beam. The multistep process for the manufacturing of the field emission cathodes is examined. The operation of the ion source, which ionizes atoms and molecules that enter the mass spectrometer with a ram velocity of about 80 km/sec, is described.

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