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A complete system performing data acquisition as well as process control is presented. This apparatus is based on a commercially available microcomputer coupled with a quite simple hardware environment. The high versatility of the device is obtained through a more elaborate software whose main ideas are detailed. Two typical applications in the atomic physics field are described. [ABSTRACT FROM AUTHOR]

Describes a spectrometer used for coincidence study of single ionization by electron impact. Basis used for scattered and ejected electrons; Measurement of the angular and energy distributions of the ejected electrons; Description of the design and operation of the spectrometer; Performance and calibration of spectrometer.

A new high-energy spectrometer for the coincident detection of both outgoing electrons in an electron impact ionization, or (e, 2e), experiment is described. The absolute triple differential cross section can be measured with this instrument to a precision of 10%. Selected results on rare gases are presented, demonstrating the ability of the spectrometer to either probe the target structure in impulsive or binary (e,2e) experiments, or to test the scattering mechanism in nonimpulsive conditions, both for valence or inner shells. [ABSTRACT FROM AUTHOR]