Development of a fast ion mass spectrometer for space research

Details Development of a fast ion mass spectrometer for space research Development of a fast ion mass spectrometer for space research

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981rsci...52..247h&link_type=abstract

Review of Scientific Instruments, vol. 52, Feb. 1981, p. 247-255. Research supported by the Southwest Research Institute and U.

Physics

4

Ion Distribution, Mass Spectrometers, Optical Measuring Instruments, Space Plasmas, Angular Distribution, Calibrating, Design Analysis, Heavy Ions, Light Ions

Scientific paper

An ion mass spectrometer having a cylindrical E bar x B bar analyzer and either a cylindrical or spherical electrostatic analyzer is described. The instrument has two nested channels and a postacceleration between the electrostatic and E bar x B bar analyzers for wide ranges of energy and mass responses. It is noted that the dual-channel construction not only doubles the data acquisition rate but also permits a reversal of the electrostatic field orientation in the inner channel for lighter ions. The outer channel is then optimized for ions of medium to high mass numbers, resulting in increased mass resolution for such heavy ions. When combined with a cylindrical E bar x B bar analyzer, a 90-deg-deflection angle spherical electrostatic analyzer provides an extremely wide viewing angle. The angular distribution of ions can be derived from such geometry if a position-sensitive resistive anode or a detector array is used at the exit aperture. Details on the principles of operation, the instrument design, and calibration are presented.

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