Abstract

Calculations of the number of molecules in an electron beam crossed by a non-homogeneous effusion molecular beam generated directly by a cylindrical capillary are presented. The influences of geometrical parameters and the mutual configuration of an effusion capillary and an electron beam on the number of molecules in the electron beam are examined. The theoretical results are compared with results obtained for CH 4 and H 2O molecular beams ionized by an electron beam in the open ion source of a cycloidal mass spectrometer.

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