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APES: Acute Precipitating Electron Spectrometer—A high time resolution monodirectional magnetic deflection electron spectrometer
Author(s) -
Michell R. G.,
Samara M.,
Grubbs G.,
Ogasawara K.,
Miller G.,
Trevino J. A.,
Webster J.,
Stange J.
Publication year - 2016
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1002/2016ja022637
Subject(s) - sounding rocket , spectrometer , electron spectrometer , electron , microchannel plate detector , atomic physics , physics , resolution (logic) , range (aeronautics) , deflection (physics) , rocket (weapon) , optics , cathode ray , computational physics , materials science , nuclear physics , astronomy , artificial intelligence , computer science , engineering , aerospace engineering , composite material
We present a description of the Acute Precipitating Electron Spectrometer (APES) that was designed and built for the Ground‐to‐Rocket Electron Electrodynamics Correlative Experiment (GREECE) auroral sounding rocket mission. The purpose was to measure the precipitating electron spectrum with high time resolution, on the order of milliseconds. The trade‐off made in order to achieve high time resolution was to limit the aperture to only one look direction. The energy selection was done by using a permanent magnet to separate the incoming electrons, such that the different energies would fall onto different regions of the microchannel plate and therefore be detected by different anodes. A rectangular microchannel plate (MCP) was used (15 mm × 100 mm), and there was a total of 50 discrete anodes under the MCP, each one 15 mm × 1.5 mm, with a 0.5 mm spacing between anodes. The target energy range of APES was 200 eV to 30 keV.