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The photoelectron‐spectrometer experiment on Atmosphere Explorer

1973; Wiley; Volume: 8; Issue: 4 Linguagem: Inglês

10.1029/rs008i004p00387

1944-799X

J. P. Doering, C. O. Bostrom, Jerawan Armstrong,

Scientific Research and Discoveries

The Atmosphere Explorer (AE) photoelectron spectrometer experiment consists of electrostatic deflection‐type electron spectrometers designed to measure the low‐energy electron flux expected to be encountered along the AE orbit. The system has been designed to provide general information on the intensity, angular distribution, energy spectrum, and net flows along field lines as well as sufficient energy resolution to allow the fine details of the electron‐energy spectrum to be studied. The instrumentation consists of two separate electron‐spectrometer detector heads connected to a common electronics system for data processing and telemetry interfacing. The experiment will measure the electron‐energy spectrum from 2 to 500 ev (and possibly to less than 0.1 ev), The energy resolution (Δ E/E ) of the electron spectrometers will be approximately 2.5% full width half maximum. The geometrical factor of the analyzers will be approximately 10 −3 cm 2 ster, independent of electron energy. Placement on the spacecraft will be arranged so as to give as little interference as possible from shadowing of electron trajectories by the spacecraft and contamination of the observed spectra by locally generated photoelectrons.