Accession Number : AD0679411

Title :   A TWO-STAGE DOUBLE-HEMISPHERICAL ELECTRON ENERGY SELECTOR,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF PURE CHEMISTRY

Personal Author(s) : Maeda,K. ; Semeluk,G. P. ; Lossing,F. P.

Report Date : 07 JUN 1968

Pagination or Media Count : 14

Abstract : The construction and performance of a two-stage electron energy selector of the double-hemispherical type are described. Energy half-widths of 0.06-0.12 V in the electron beam have been obtained with operating voltages of 10-30 V in the hemispherical stages. No magnetic shielding was employed. Resolved electron currents at a half-width of 0.07 V were obtained, in the form of a well-collimated beam which was passed axially through a cylindrical reaction chamber. Preliminary results without mass resolution on metastable-atom and positive-ion formation are reported, together with later results on formation of Ar(+) and Kr(+) using a quadrupole mass filter, in rare gases. (Author)

Descriptors :   (*ATOMIC ENERGY LEVELS, MEASUREMENT), (*MASS SPECTROSCOPY, INSTRUMENTATION), MOLECULAR STRUCTURE, ELECTRON BEAMS, TEST METHODS, TEST EQUIPMENT, INTERACTIONS, MAGNETIC FIELDS, ELECTRIC FIELDS, CONSTRUCTION, SELECTION, CANADA

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE