Design and numerical simulation of a 3-D electron plasma analyzer that resolves both energy and elevation angle

Details Design and numerical simulation of a 3-D electron plasma analyzer that resolves both energy and elevation angle Design and numerical simulation of a 3-D electron plasma analyzer that resolves both energy and elevation angle

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989nimpa.281..628w&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 281, Issue 3, p. 628-639.

Physics

2

Scientific paper

The Comet Rendezvous and Asteroid Flyby Mission (CRAF) will include, as one of its complement of thirteen scientific instruments, a plasma electron analyzer capable of providing 3-dimensional measurements of the energy and angular distribution of electrons in the solar wind, asteroidal and cometary environments. After initial instrument selection, mission planners at JPL suggested that an instrument capable of performing angular scanning electronically rather than mechanically be investigated. This paper describes the computer design of the new CRAF plasma electron detector, consisting of an electronic scanning component, called the ``elevation analyzer'', and an energy analyzing component based on the Soft Particle Spectrometer (SPS) and its successor, the Spectrographic Particle Imager (SPI). Numerical simulation of each component's operation - consisting of ray-tracing particles through the electrostatic field of each analyzer and collecting statistics on those particles successfully transmitted - is used to determine the energy and angular response functions of each component and the design dimensions that optimize these responses.

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